YMGI WMMS-09EU-V2B Instruction Manual

Literature Part No:
Subject to Continuous Engineering Change and Product Improvement without Notice.
LIT-WMMS-(59)2-EU-DC IVTR-SERVICE MANUAL-20131130
YMGI Group
POB 1559
O'Fallon, MO 63386, USA
Tel:[phone] Fax:[phone]
Web Site: www.ymgigroup.com
Email: [email protected]
YMGI, Engineered HVAC & R Products for Maximum Green World and Better Tomorrow
LITERATURE: LIT-WMMS-(59)2-EU-DC IVTR-SERVICE MANUAL-20131130
DC INVERTER MULTIPLE ZONE (59)2
SYMPHONY CHOIR
INSTALLER'S INSTRUCTION & USER'S MANUAL
INDOOR UNIT-CEILING/FLOOR MOUNT (EU)
YMGI is the Trademark and Property of YMGI Group. Copyright of YMGI Group.
This product is designed and manufactured free from defects in material and workmanship for the normal use and
maintenance. Installation, operation, maintenance and service shall follow professional practices for regular cooling and
heating equipment, NEC, State, City or Local Codes and related manuals from YMGI. Otherwise, damage to equipment or
property even injury to people may occur.
Installer: Currently licensed HVAC technician only. Read manual before installation. Fully fill in warranty registration card.
User: Keep this manual for future maintenance and service use.
Servicer: Use this manual for service reference.
YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World !
WMMS-09EU-V2B(59) (2)
WMMS-12EU-V2B(59) (2)
WMMS-18EU-V2B(59) (2)
WMMS-24EU-V2B(59) (2)

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CONTENTS
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INTRODUCTION
UNIT SPECIFICATIONS
UNIT DIMENSIONS
INSTALLATION INSTRUCTION
PART NAMES AND THEIR FUNCTIONS
INSTALLATION OF INDOOR UNIT
REFRIGERANT PIPING WORK
DRAIN PIPING WORK
TEST RUNNING
ROUTINE CHECK AFTER INSTALLATION
MAINTENANCE
OPERATING GUIDE
TROUBLE-SHOOTING GUIDE
PRECAUTIONS
PROTECTION AND ERROR CODES
WARRANTY AND TECH. SUPPORT
LIMITED PRODUCT WARRANTY POLICIES
LIMITED PRODUCT WARRANTY REGISTRATION CARD
All Units Shall Be Installed by Experienced or Licensed Contractor Or
Technician. Read Manuals before Installation.
YMGI Group Will NOT Take Any Responsibilities for Any Damage or
Loss Due to Do-It-Yourself(DIY) self-installation and other Improper Installation or Operation or
Natural Disaster.
Connect All Wiring Securely. Loose Wire or Other Bad Contact May Cause
Arc or Overheating and Fire Hazard.
Following NEC, State and Local Codes and Installation Instructions of All
Units, Otherwise Unit Warranty Will Be Void and Serious Damage To People Or Property May Be
Caused.
Don't Supply Power until All Wiring and Tubing and Checking is
Completed. Ground the Unit Following Instructions and NEC, State and Local Codes.
YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World !YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World !
OPTIONAL WALL MOUNT CONTROL (NOT REGULAR THERMOSTAT)
REMOTE CONTROL-BUTTON NAME & FUNCTIONS
CHECKING UNITS PRIOR TO CONTACTING YOUR TECHNICIAN
USER NOTES AND INSTALLATION/SERVICE/MAINTENANCE NOTES
WIRING DIAGRAMS
WELCOME AND PLEASE READ THROUGH MANUALS
MUST READ-1
WELCOME AND PLEASE READ THROUGH MANUALS
INSTALLING TECHNICIAN/CONTRACTOR'S JOBS AND RESPONSIBILITIES
29
26
28
CUSTOMER AND TECHNICIAN MUST READ
4
2
Toll Free Number: [phone]
Email: [email protected]
If you have any questions about your unit or even doubt if the unit has any problem, you can first check against
the mannds. If you can not find answers, then you can contact your local installer or service technician to
physically inspect the unit. If at the time of inspection the installer or service technician have any questions they
can contact YMGI technical support division directly at:
Dear Customer(s)/end User(s)/unit Purchaser(s)/installer(s)/Contractor(s):
Thanks for choosing YMGI products.
The YMGI equipment you purchased is either a split-type or a self-contained cooling/heating system which
requires an installer's license, certification, knowledge, experience, carefulness and details for a successful and
good installation. This equipment is different from those window or portable air conditioners you can normally
purchase from local retail stores such as Home Depot, Lowe's, Sears, etc. which the manufacturer may not
require licensed personnel to install.
Reading and following the YMGI Group's recommendations, suggestions, and requirements, written in the
following pages and other documents, is the first step to ensuring a smooth and trouble free installation & proper
operation of your products for many years to come.
YMGI Group, POB 1559, O'Fallon, MO 63366 is the only party who holds the final explanation (in authorized
writing) about any descriptions or data in YMGI-published materials, including but not limited to
YMGI product brochures, manuals, pamphlets, catalogs, videos and any other media. YMGI's distributors,
installers, dealers, agents, customers or any other third parties shall not supersede YMGI to make any
explanation about what YMGI-published materials mean. Any uncertainty or questions, arising from YMGI
distributors, installers, dealers, agents, customers or any other third parties, should be passed directly to YMGI
for an explanation in writing.
IMPORTANT NOTE-YMGI HOLDS FINAL EXPLANATION:
The quality of the installation plays a key role in whether the units will work well and for an extended period of
time. The information we provide in our manuals is for the sole purpose of reminding you and your installer.
It is our ultimate goal to help insure that your YMGI units are installed properly and correctly from the very
beginning to the very end. This ensures that your YMGI units will work well and not only provide a comfortable
room but also peace of mind.
YMGI doesn't recommend nor allow any do-it-yourself (DIY) installation (partially or fully), since DIY will cause
problems sooner or later to your units and your upfront saving is Not saving down the road.
YMGI warranty doesn't cover any DIY units.

P4 OF 36
P3 OF 36 YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World !YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World !
MUST READ-1 MUST READ-1
1. Be sure to hire only one certified, licensed HVAC Company to complete 100% of the installation so that all
details of the installation are clear, complete and well taken care of.
2. Be sure to have ONLY the licensed HVAC professional perform all parts of the installation. Factory Warranty
will be lost if any portion of the installation is not performed by licensed HVAC contractor. DIY or partial DIY will
void ALL factory warranties. One example of partial DIY would be calling the HVAC technician to release
refrigerant or the sort while other installation has or is to be conducted by non-HVAC technician.
3. With hiring a technician that is offering their services as a "side job" and not through their licensed HVAC
company may pose a possible risk of an incomplete or unsatisfactory installation of no guaranteed
workmanship and lack of further service, if needed.
4. Have the installing technician read in full the installation manual of the product model you have. Some details
may vary and some may be the key to determine the success and quality of the installation. Experience with
certain manufacturer may not be applied fully to another manufacturer. For example, wiring, refrigerant
adjustment and trial testing procedures may differ from manufacturer to manufacturer and model to model.
Any ignoring or negligence may cause unit failure or damage which could be irrevocable and permanent.
5. All of YMGI's products are fully tested and have passed rigorous safety and performance standards and others
related to the industry, before being packed and shipped. YMGI only uses famous brands as suppliers for their
parts that are also known for their high quality and performance. The quality of the installation plays a key role
as much as up to 90% importance in your unit's overall performance and lifetime. A poor installation can result
in unit failure and inefficiency either immediately or over a period of time.
6. Some licensed contractor/technician may make a mistake some time. YMGI doesn't supervise nor is able to
control their installation.It is key that the installer take each variable into account during the initial
installation in order to ensure a complete and professional installation and properly working units.
ATTENTIONS
The following will cause damage to the unit and key components factory
warranty:
and the loss of your unit's
1. Any foreign substances introduced into the system as a result of failure of not sealing the ends of the
refrigeration piping before pulling through structures at time of installation.
2. Not installing an oil P-trap in the suction copper line where indoor unit is located 18' or more below outdoor unit.
3. Cross piping and/or cross wiring on any units including more than one single zone or a multi zone system.
4. Not conducting a positive leak check by charging the system with dry-nitrogen and soap bubble testing.
5. Not conducting a negative leak check by evacuating the copper lines for 30 minutes. Vacuum must be held at
500 micron or better for at least 5 minutes, starting from 5 minutes after the vacuum pump is shut off.
6. Not conducting a positive leak check prior to the negative leak check.
7. Not selecting the correct size of wire or circuit breaker.
8. Not answering ALL questions in the technician's checklist inside the warranty registration form.
1. Any kinks or improper bending of the copper piping.
2. Any improper flaring or not centering of the flare with the nut, or not tightening any connection.
3. Not trial testing each indoor unit individually.
4. Not reading technical data (temp/time/pressure/current) after the system is stabilized (normally compressor
needs to work at least 10 minutes). Data read too early may lead to inaccurate or false judgment or even a
false sense of security.
In an effort to protect our customers from any possible faulty installation which can lead to premature unit failure,
we like to provide the above information to you in addition to the technician. You can judge yourself and
observe while your system is being installed, though your observation may not be treated as any guarantee
whether your system would be installed properly and professionally. If at any time you feel there may be an
installation issue, please have your technician contact YMGI at [phone] x 703 to clear your questions.
The following may be overlooked, ignored, or treated as not a problem during your installer's installation,
but actually will cause your unit to underperform or even cause unit failure.
WELCOME AND PLEASE READ THROUGH MANUALS
1) Check with the customers to find out detailed information of structure to be conditioned, local weather (typical design and
extreme temperature/humidity conditions, cooling and heating hours), previous and existing HVAC equipment, usage and
dependence on the new HVAC equipment or the YMGI products.
2) Performing a cooling/heating load calculation by using commercially available professional programs/methods such as
Right-J (Manual J) for residential HVAC applications/jobs and Right-CommLoad (ASHRAE RTS/CLTD) for light commercial
and commercial HVAC applications/jobs.
3) Check with YMGI distributor/sales or contact manufacturer directly to obtain information to fully understand YMGI products,
including but not limited to product features, cooling/heating performance-at standard ratings/conditions and extreme
conditions, allowed indoor and outdoor temperature/humidity ranges, installation, operation, maintenance, service,
warranty, parts and so on.
4) Properly select correct (most suitable) YMGI product models (of units and accessories) for your HVAC applications/jobs
and list them in your proposal/quote, in writing, on your company's quote form or letter head, basing upon the information
you get from 1), 2) and 3) above.
5) List your currently valid HVAC license # and EPA # in your proposal/quote.
6) Make sure you are the only party to perform the whole installation job and you will not sub-contract any part of the
installation to any non-licensed parties/persons. You will be solely responsibile for the full installation that you have been
contracted for.
7) Check to make sure you have all the materials you need to properly and correctly finish the installation. The YMGI units
and accessories may be just a portion of what you need. YMGI employees and YMGI distributors/sales, dealers and agents
are not installers and may only be able to provide suggestions to you, but you are the only sole decision maker to
determine what other materials you must need and/or the customer may want to fulfill the installation job.
8) Check against both NEC and your local codes to make sure all the installation of YMGI units and accessories meet these
requirements.
9) Connect the unit to correct electrical power source. In the area where lightning or storm incurs frequently, a proper type/
size of power surge protector needs to be installed between the outdoor unit and power source.
10) Select proper types and sizes of HVAC circuit breakers, disconnect switch boxes, wires and conduits from circuit breaker
to disconnect box and then from disconnect box to outdoor unit.
11) Select proper location to mount indoor units and outdoor units with all factory requirements being followed (cooling/
heating/air is not blocked or restricted, mounting structure is secure, aesthetical looking, installation convenience is
considered, maintenance/service clearance is ensured and all applicable codes are met and etc.).
12) Cap/tape the two ends of every copper line before running them through structures to keep from any foreign substances
entering into pipe and causing contamination. Label them A-A, B-B, C-C, D-D, or other marks on each pair of copper
line/wiring cable set to keep from any possible cross-piping or cross-wiring in multiple zone installations or where pipes for
different single zone systems are close to one another.
13) Secure the wiring cables that connect between indoor unit and outdoor unit, following applicable NEC and local codes for
your particular installation. If there is no special NEC or local code to govern how these wires are to be installed, you can
tape/cable tie them along with insulated copper line.
14) Tighten all pipe and wire connections to keep from any possible leakage or false connection.
15) Conduct positive pressure leakage checking of inter-connecting copper lines between each indoor unit and outdoor unit by
charging dry-nitrogen at outdoor unit service port (note: don't back-seat stopping valve, at this time). Liquid soap solution
shall be applied at all pipe connections to check for leakage. A1/4-5/16" hose/valve adaptor may be needed if you have
traditional manifold of 1/4" connection hose.
16) If there is no positive leaking, then conduct negative pressure leakage checking of inter-connecting copper lines between
each indoor unit and outdoor unit by pulling vacuum at outdoor unit service port (note: don't back-seat stopping valve, at
this time) and checking if the vacuum level 500 Micron can be held for at least 20 minutes.
17) If there is no leakage found at refrigeration pipe connections, flip up the indoor unit face panel and remove filter, carefully
pour some clear water onto the up-right aluminum coil surface to test if the water can drain out of each indoor unit freely
without any leakage being found.
18) If there is water leakage found, locate the source of the leak and correct. Only after everything is clear engage the correct
electrical power to the system.
19) Then back-seat stopping valves of outdoor unit to release refrigerant from outdoor unit into inter-connecting pipes and
indoor unit.
20) Check to make sure both indoor unit and outdoor unit are powered on correctly before controlling the indoor unit to
operate in fan mode first. Then move on to test cooling, dehumidifying/drying, heating and other modes.
21) Read refrigerant pressures and pipe/valve temperatures only until the system is stabilized (normally 10 minutes after
cooling/heating mode is started successfully). Put this data into the technician checklist in the lower half section of the
Limited Product Warranty Registration Card/Form.
22) Adjust refrigerant charging level (remove refrigerant if pipe is shorter/temperature is colder; add refrigerant if pipe is
longer/temperature is warmer), following manufacturer's instructions, if average pipe length is shorter or longer than 25'
and pressure/temperature readings at outdoor unit service valves are not falling into normal ranges.
23) Explain to the user/owner(s) about proper unit operation and maintenance and leave your contact information for them to
reach you easily.
24) If the customer finds the unit doesn't work properly and cannot resolve the issue themselves, check the customer's
units/parts/accessories and correct the problem if there is any. Communicate with YMGI-technical support line (866)833-
3138 x 703, if needing help.
Following these requirements will aid in ensuring the units to be installed to the general HVAC practicing standards and
necessary factory requirements, finding any possible problems early, preventing any further damage to the unit and helping
ensure a properly working unit over its lifetime.
INSTALLING TECHNICIAN/CONTRACTOR'S JOBS AND RESPONSIBILITIES

WARRANTY POLICIES AND REGISTRATION
CARD/FORM
WARRANTY POLICIES AND REGISTRATION
CARD/FORM
P5 OF 36 P6 OF 36
YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World !YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World !
LIMITED PRODUCT WARRANTY POLICIES
The YMGI products are designed and manufactured free from defects in workmanship, and materials for normal
use. However, for any reason, including many handlings and occasions between the YMGI factories/warehouses
and where you receive the products, the unit doesn't work, YMGI Group will help to remedy the occurrence in the
following warranting ways:
Compressor: YMGI will warrant the compressor of YMGI-validated and approved warranty filing, for a period of
5 years from the date of successful installation at original location.
Parts: YMGI will warrant parts of YMGI-validated and approved warranty filing, for one year from the date of
successful installation at original location.
All warranty compressors and parts replaced will become the sole property of YMGI Group and must be returned
to YMGI Group upon request. Warranty parts may be new or refurbished. All parts are tested and approved
before shipping.
At no time does the YMGI Group warrant labor cost of any type. Warranty will start from the date of
successful installation at initial location, or 90 days as of original shipping date from YMGI Group,
whichever comes first.
This is a standard warranty of limited liability and DOES NOT cover the following:
* Any damage or repairs to properties, or persons as an incident or consequence of improper or faulty
transportation, installation, operation, maintenance or service.
* Damage caused by frozen or broken water hoses or refrigeration pipes in the event of equipment failure.
* Any damage as a result of floods, fire, wind, lightening, accidents, corrosive atmosphere or any other conditions
beyond the control of YMGI Group.
* Any damage due to interruption or inadequate electrical service to equipment.
* Any products that are installed outside the US or Canada.
* Any unit that has been moved from the original installation address.
* Any labor costs associated with the installation or service of the unit.
* Poor unit performance due to improper unit selection (SEER, Unit size).
To validate the above warranties, ALL the following conditions must all be fulfilled:
1. The unit was fully (100%) and successfully installed by licensed or certified HVAC technicians.
2. The unit was installed following all NEC, state and local codes.
3. The unit was installed following all instructions and manuals made by YMGI Group.
4. ALL fields, especially the technician-checklist, of the Limited Warranty Registration Card/Form were filled
completely by the installing technician and signed by both the installing company technician and the unit owner.
5. The Limited Warranty Registration Card/Form and a copy of the original installing company's invoice had
been received by YMGI Group-Warranty Dept., POB 1559, O'Fallon, MO 63366, within 7 days of successful
installation.
No warranty filing will be validated or approved, if any one of the above 5 conditions is not met.
Product registration doesn't guarantee the validity of this limited warranty statement.
Steps to follow for warranty part replacement:
1. Installing or service technician contacts YMGI tech support at 1-866-833-3138 ext 703 from the jobsite, to
double-check and confirm with YMGI Technical support the exact part(s) needed to fix all the problems.
2. YMGI will check the customer's warranty filing. Parts for validated and approved warranty will not be charged.
Parts of invalid warranty filing or unapproved warranty requesting, will be charged accordingly.
3. YMGI will ground ship out the parts ASAP. Expedited shipping is available at the customer's cost.
4. Replacement parts of approved warranty registration are to be warranted for the remainder of the 1 year parts
and 5 year compressor warranty. Purchasing of replacement parts of invalid warranty filing or unapproved
warranty requesting, will be as they are and bear no warranty.
YMGI keeps on improving products with various engineering changes without prior notice. Such improvements
or changes include but not limited to product specification, appearance, functions, sizes, packaging and others.
These improvements or changes will not void the limited warranty stated herein. YMGI keeps the final explanation
of this warranty policy.
LIMITED PRODUCT WARRANTY REGISTRATION CARD
LIMITED PRODUCT WARRANTY
REGISTRATION CARD / FORM
YMGI to Fill Top Portion, at Shipping, and Keep Copy A; Center Copy B for Installer to Fill and Mail back to YMGI; Bottom Copy C for Customer to Fill and Keep
Installation Finished and Unit Works Successfully.
Print Name of Installation HVAC Technician:
Signature:
Date and time:
Installation Finished and Unit Works Successfully.
Print Name of Owner:
Signature:
Date and time:
1) Are you the only one to install whole system?
If not, % of installation done by you (HVAC technician).
3) Did you read the User Manual and Installation Instruction, before you
started the installation?
5) Supply electrical power V/Ph/Hz measured at wiring terminal block of
Indoor unit: outdoor unit:
7) Wire gauge, length and terminal colors between circuit breaker/
disconnect switch to outdoor unit:
9) The size of HVAC circuit breaker/fuse or disconnect switch to the
outdoor unit:
11) What is the refrigerant pipe length between each indoor unit and the
outdoor unit? Unit A Unit B Unit C Unit D...
13) What is the elevation difference between each indoor unit and the
outdoor unit? Unit A Unit B Unit C Unit D...
(indoor unit above outdoor unit +, below -)
15) Where is the outdoor unit located?
Ground wall balcony roof other
location or pad
17) Were the refrigerant pipe ends capped or taped seal, prior to running
them through structures to keep debris from entering the copper lines?
21) Did you check if the compressor can be started and stopped in a
correct (design) manner?
25) Have you checked all unit functions, with customer's witness, and all
functions are correct?
27) Do you provide regular one-year free technical service for this
installation?
2) What had been done, prior to your arrival?
4) Who unpacked the unit and accessory boxes to check for damage?
6) Incoming electrical power V/Ph/Hz measured at terminal blocks of
indoor unit: outdoor unit:
8) Wire gauge, length and terminal colors between each indoor and
outdoor unit: Unit A Unit B Unit C Unit D...
12) Where is/are the indoor unit(s) located?
Unit A Unit B Unit C Unit D...
16) Have you checked to make sure there is no cross-piping and no
cross-wiring between any two indoor units (zones)? How did you do it,
who was with you?
22) If copper length were not made to the supplied or recommended
refrigerant pipe length, how much refrigerant added or deducted?
26) Did you show the user how to operate the unit? Did he/she understand you?
Contact Where the Units are Installed:
Name:
Address:
City: State (Province):
Contact of the Installing HVAC Contractor/Technician:
Technician Full Name (Print):
HVAC Technician's Company Name:
Address:
Currently Licensed or Certified HVAC Technician License or Certification Number:
Official Phone # to Check the License Validity:
Phone: Fax:
Email:
Country:
YMGI-Recommended Contractor/Technician:
Phone:Fax:
Email:
City:State (Province):
License Approved or Certified by:
The Company the
Unit Was Sold Though:
Did the Company
Pay to YMGI:
Installation Invoice Attached
to the Registration Card
For
YMGI
Use
Only
Unit #5
Unit #6
Unit #7
Unit #8
Outdoor Serial Number (One Outdoor
Unit, One Registration Card/Form):
Indoor
Serial
Number:
For Multi
Zone Units
Unit #1
Unit #2
Unit #3
Unit #4
Shipping Packing
List Number:
Registration Card
Serial No.
Date the Filled Registration
Card YMGI Received:
Unit(s) Work
Successfully (Yes/No):
Warranty
Approved
Warranty
Denied
18) Have you checked and run cooling or heating, one unit by one unit, all
working fine?
20) Did you vacuum correctly to check the connecting pipes and indoor unit for
leakage, what was the micron gauge reading, for how many minutes?
24) What were the measured temperatures (probe not touching any metal):
O O O
At cooling: indoor return air F, discharge air F, and outdoor F
O O O
At heating: indoor return air F, discharge air F, and outdoor F
23) Measured refrigerant pressures at outdoor service suction valve, when unit
was st. O
Heat pump (PSI): Cooling (PSI): Outdoor Ambient Temp. ( F):
HVAC Contractor/
Technician--Name
Hired YMGI-Recommended
HVAC Contractor/Technician?
List for Installating HVAC Technician to Double Check Installation Quality, and Warranty Processing Purpose (if not filled by technician, or not filled fully, warranty will void)
10) Are the inter-connecting wires and copper lines between indoor and outdoor
units installed/covered/protected by line set covers, or anything else?
14) Did you check the indoor unit for condensate leakage and refrigerant
leakage, before and after connecting them?
28) Do you list the working details in the invoice and leave a copy to the
customer?
19) Did you charge the inter-connection copper pipes and indoor unit with
nitrogen to check for positive leakage (pressures 150-200PSI), before
conducting vacuuming leakage check?
By signing above, I acknowledge the liability and responsibility for any false statement or not telling all the facts, and I authorize YMGI to check the details of the filled above, and make its
decision on warranty. I understand our filing or filling the warranty card/form DOESN'T mean automatic warranty approval, because warranty is approved only to those qualified and successful
installations by qualified HVAC technician. I know the warranty, if approved, is a standard 5-year compressor and 1-year other parts only, without any labor coverage. I agree to and will follow
all the contents contained in the Limited Product Warranty Policy that YMGI, not other entity, stated in public, including but not limited to manuals, web site, email, etc.
Important Note: A copy of the installing HVAC company's invoice to show all their work details, your payment proof, center copy B of this registration card filled after a successful
installation, all three (3) MUST be mailed together to Warranty Dept., YMGI Group, POB 1559, O'Fallon, MO 63366, for warranty processing. Customer keeps bottom copy C. YMGI
will check against copy A that was kept at YMGI.
Is the outdoor unit anchored to
ground or secured onto wall
bracket?

WARRANTY POLICIES AND REGISTRATION
CARD/FORM
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YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World !YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World !
BRIEF UNIT INFO
Apartments Office Buildings Homes
Ceiling Mount Cassette Systems are designed for high performance, easy installation and service. Each system
consists of one or several indoor units and one outdoor unit, which are connected by one set or several sets of
interconnection refrigerant pipes and electric wires.
As shown in the following sample picture, air is drawn through the center grilles/filters and then discharged at 4
vents in 4/8 directions. In cooling mode, air passing through coil is cooled; in heating mode, air passing through
coil is heated.
INTRODUCTION
Sample Split System-Indoor and Outdoor Units
(For Continuous Engineering Improvement and Various Marketing Needs and Actual Part Availability
Reason, Unit Appearance Subject to Change or Update Continuously without Prior Notice)
The electrical and thermal power for the whole system comes from the outdoor unit. In YMGI SHCR or TTWC
series of side discharge outdoor condensing unit(s), electrical and thermal components such as compressors and
motors and heat exchange coils and others, are incorporated into the cabinet in an optimized order. These
condensing units can be either hung on the wall or installed on the ground. Once stacking or bracket kit is used,
some outdoor units can be stacked 2 or 3 units high, upon unit size and applications. Air is discharged
horizontally, quietly and smoothly. These units are a perfect fit in locations where installation and applications of
general up-flow condensing units are limited, such as apartments, condos, lofts, multi-families and high-rise
buildings and others.
Indoor unit(s) delivers the thermal and acoustical comfort to the rooms. In cooling mode, air passing through coil
is cooled; in heating mode, air passing through coil is heated. Air is filtered or treated by the built-in mechanism
(washable or enzyme equipped or electrostatic powered filter, varies from model to model), before being
delivered into the room, with more than enough comfort and care, at a wide angle (swing or not, varies from
model to model).
Application Samples-Ceiling Mount Cassette
NOTES:
Since ductless system is not designed to incorporate or use with ducted return or discharge tunnels, one single-
zone unit SHALL NOT be used to take care of the cooling or heating load of more than one-story room. Several
single-zone ductless systems or multiple-zone ductless systems shall be used in this regard.
These units are designed for applications at:
* Residential * Light commercial
* Commercial * Institutional
* Industrial * Hospital
These units are designed for general T-1 weather conditions as outlined in the following table:
Outdoor unit
Air in
Air Out
Air Out
Air in
Indoor unit
WARRANTY AND TECH. SUPPORT
YMGI warrants to the purchaser/owner(s) that YMGI products be free from defects in
workmanship under the normal use and maintenance, with the standard Limited Product Warranty
Policies that comes with the unit or sales package.
material and
YMGI IS NOT RESPONSIBLE FOR
CONTACT FOR FIELD SERVICE OR REPAIR
The following people, in a prioritized sequence, will take care of your request or issue:
1) The original installer; otherwise,
2) Your current service contractor; otherwise,
3) Authorized contractor in YMGI list that is close to you; otherwise,
4) Authorized Distributor in YMGI Distributor list; otherwise,
5) Contractor/Distributor you prefer who is close to you.
CONTACT FOR GENERAL TECHNICAL QUESTIONS OR SUPPORT, IN A SEQUENCE:
1) The original installer; otherwise,
2) The current service contractor; otherwise,
3) The distributor; where the unit is purchased from otherwise,
4) YMGI Technical Support:
Tel: [phone]*703 Email: [email protected]
* Regular equipment maintenance or field service or field inspection.
* Damage or repairs required as a consequence Customer do-it-yoursely(DIY) installation and/or any other faulty
installation or improper application.
* Failure to start due to voltage conditions, blown fuses, open circuit breakers, or other damages due to the
inadequacy or interruption of electrical service.
* Damage or repairs needed as a consequence of any misapplication, abuse, improper servicing, unauthorized
alteration, or improper operation.
* Damage as a result of floods, winds, fires, lightening, accidents, corrosive atmosphere, or other conditions
beyond the control of YMGI.
* Parts not supplied or designated by YMGI.
* Products installed outside USA or Canada.
* Any damages to person or property of whatever kind, direct or indirect, special or consequential, whether
resulting from use or loss of use of the product.
The original licensed installer or current service contractor should be contacted first of all, since they installed
the unit and/or know more details than anybody else.
They will check the unit and find out the problems with the professional knowledge about HVAC and electric
product installation by using special tools or instrument.
They can contact YMGI technical support for technical help during unit installation or inspection.
Product model and serial numbers needed, which can be found on unit nameplate sticker, so that our
technician can quickly identify the unit, parts and wiring diagrams, among our many products and models.
* Any problems due to improper cooling and heating load calcuation of the room/building the air conditioner/heat
pump system is to be installed. Equipment users can get the calculation schedule from your room/building
architect or your installation or related service HVAC contractor, who should have the knowledge and the tools
to do these calculations correctly.
* Any problems due to improper sizing and selecting air conditioner/heat pump system. These equipment sizing
and selection work should be conducted by either your room/building architect or your installation or related
service HVAC contractor, who should have the knowledge and the tools to do these calculations correctly, and
get your approval, before purchasing the air conditioner or heat pump equipment.
* Any problems due to improper installing of the air conditioner/heat pump system. Installation should be
conducted by currently licensed HVAC technician, following manufacturer installation instructions, all governing
safety codes, with care and professionalism.
* Any problems due to improper operation of the air conditioner/heat pump system. Users shall keep the manual
and refer to it for the correct understanding of how the unit will work and how to operate the unit correctly.
* Any problems due to improper maintenance of the air conditioner/heat pump system. Like a car, regular
maintenance or yearly checking is necessary for the unit to work properly for you, before the season comes. For
example, air filter shall be checked for cleaness from time to time. Remote control batteries shall be checked for
enough power, before judging the unit is not working...

BRIEF UNIT INFO BRIEF UNIT INFO
P9 OF 36 P10 OF 36
YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World !YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World !
UNIT SPECIFICATIONS
Indoor side noise when blowing
60
50
40
30
20
10
0
Noise/dB(A)
Low Middle High
Indoor fan motor rotating speed
09K
12K
18K
NOISE LEVEL
GENERATION 1
UNIT SPECIFICATIONS
Indoor side noise when blowing
60
50
40
30
20
10
0
Noise/dB(A)
Low Middle High
Indoor fan motor rotating speed
09K
12K
18K
NOISE LEVEL
GENERATION 2
WMMS-18EU-V2B(59)
208-230/1/60
187-253V
22500/18000/6800
19500
16600
14200
16
8.2
1.9
360/330/312
0
54/50/47
64/60/57
FG20E
Double
1070/970/870
40
110
3
Centrifugal-2
4.9x5.3
MP35CB
2
2
NA
Blue or the Like
Yes
1/4" + 1/2"
0.67
NA
Yes
Standard-Washable
21.8 x 8.68 - 2
Yes
Yes
Yes
Yes
32.9 x 27.4 x 9.37
36.8 x 31.7 x 11.6
62
81
112/232/274
Items
Power Supply
Cooling Capacity (Btu/h)
Heating Capacity (Btu/h)
SEER
HSPF
Duhumidifying Capacity
Air Flow (CFM)
Air-throw (Ft.)
External Static Pressure
Sound Level
Fan Motor
Fan Wheel
Swing/Step Motor
Input Power of Ele. Heater
Electrical Protection Fuse
Evaporator Coil
Copper Line Connections
Drain Hose Connection
Condensate Pump
Refrigerant Environmental Friendly
Filter
Clean Coil Surface
Pre-heating Function
Memory of Previous Set-ups
Auto-Restart Function
Unit Dimensions
Unit Weight
Loading Capacity
Unit / Conditions
Voltage/Ph/Hz
Allowed Voltage Range
High/Standard/Low
ID 70/60, OD 47/43F
ID 70/60, OD 17/15F
ID 70/60, OD 17/5F
Btu/h.W
Btu/h.W
Pints/Hr.
High/Medium/Low
Horizontal Installation
Upright Installation
Water In.
Pressure dB(A) (H/M/L)
Power dB(A) (H/M/L)
Model
Shaft
Speed (RMP, H/M/L)
Output (W)
Input (W)
Capacitor (uF)
Type-Piece
Diameter x Width (In.)
Model
Piece
Output (W)
Type-W
PCB / Transformer
Type
Color
Sealed by Dry Nitrogen
Flare/Nut-Liuqid + Gas
OD (In.)
Installed-Lift (In.)
R410A
Type-Feature
Size WxH (In.) - Qty.
Anti-Mildew Function
Anti-Cold Blowing
Power is Lost/Resumed
If Power is Resumed
Net WxHxD (In.)
Package WxHxD (In.)
Net (LBs)
Packaged (LBs)
20'/40'/40'HQ
WMMS-09EU-V2B(59)
208-230/1/60
187-253V
10700/9000/4600
10000
8800
6800
16
8.2
1.5
360/330/310
35-30 Upon Mounting Height/Speed/Temp.
35-20 Upon Mounting Location/Speed/Temp.
0
45/40/32
55/50/42
FG10A
Double
790/670/550
10
55
1
Centrifugal-2
4.9 x 5.3
MP35CB
2
2
NA
T3.15A 250V / 0.2A
Alu. Fin/Inner Grooved Copper Tube
Blue or the Like
Yes
1/4" + 3/8"
0.67
NA
Yes
Standard-Washable
21.8 x 8.68 - 2
Yes
Yes
Yes
Yes
32.9 x 27.4 x 9.37
36.8 x 31.7 x 11.6
59.5
78.2
112/232/274
WMMS-12EU-V2B(59)
208-230/1/60
187-253V
14100/12000/5900
13500
11600
9200
16
8.2
1.6
410/360/340
0
46/43/36
56/53/46
FG10A
Double
790/670/550
10
55
1.5
Centrifugal-2
4.9 x 5.3
MP35CB
2
2
NA
Blue or the Like
Yes
1/4" + 3/8"
0.67
NA
Yes
Standard-Washable
21.8 x 8.68 - 2
Yes
Yes
Yes
Yes
32.9 x 27.4 x 9.38
36.8 x 31.7 x 11.7
59.5
78.2
112/232/274
WMMS-24EU-V2B(59)2
208-230/1/60
187-253V
26500/22800/9600
27400
23600
20600
16
8.2
5.28
736/530/412
0
48/46/44
58/56/54
FG50A
Double
985/800/680
40
145
2
Centrifugal-4
5.5 x 4.1
MP35CB
2
2
NA
Blue or the Like
Yes
1/4" + 5/8"
0.67
NA
Yes
Standard-Washable
21.8 x 8.68 - 2
Yes
Yes
Yes
Yes
48 x 27.6 x 8.9
52.8 x 32.3 x 11.8
99
119
66/132/132
WMMS-18EU-V2B(59)2
208-230/1/60
187-253V
21500/17000/6800
18700
16600
13800
16
8.2
3.8
559/412/294
0
45/42/40
55/52/50
FG20E
Double
985/800/680
20
110
2.5
Centrifugal-4
5.5 x 4.1
MP35CB
2
2
NA
Blue or the Like
Yes
1/4" + 1/2"
0.67
NA
Yes
Standard-Washable
21.8 x 8.68 - 2
Yes
Yes
Yes
Yes
48 x 27.6 x 8.9
52.8 x 32.3 x 11.8
88
110
66/132/132
WMMS-12EU-V2B(59)2
208-230/1/60
187-253V
14100/11900/5900
13100
11600
9100
16
8.2
2.96
383/324/265
0
40/38/36
50/48/46
FG10A
Double
690/610/480
15
55
1
Centrifugal-2
5.5 x 4.1
MP35CB
2
2
NA
Blue or the Like
Yes
1/4" + 3/8"
0.67
NA
Yes
Standard-Washable
21.8 x 8.68 - 2
Yes
Yes
Yes
Yes
48 x 27.6 x 8.9
52.8 x 32.3 x 11.8
88
110
66/132/132
WMMS-09EU-V2B(59)2
208-230/1/60
187-253V
10700/8500/4600
9500
8800
8000
16
8.2
1.7
383/324/265
35-30 Upon Mounting Height/Speed/Temp.
35-20 Upon Mounting Location/Speed/Temp.
0
40/38/36
50/48/46
FG10A
Double
690/610/480
15
55
1
Centrifugal-2
5.5 x 4.1
MP35CB
2
2
NA
T3.15A 250V / 0.2A
Alu. Fin/Inner Grooved Copper Tube
Blue or the Like
Yes
1/4" + 3/8"
0.67
NA
Yes
Standard-Washable
21.8 x 8.68 - 2
Yes
Yes
Yes
Yes
48 x 27.6 x 8.9
52.8 x 32.3 x 11.8
88
110
66/132/132
Unit / Conditions
Voltage/Ph/Hz
Allowed Voltage Range
High/Standard/Low
ID 70/60, OD 47/43F
ID 70/60, OD 17/15F
ID 70/60, OD 17/5F
Btu/h.W
Btu/h.W
Pints/Hr.
High/Medium/Low
Horizontal Installation
Upright Installation
Water In.
Pressure dB(A) (H/M/L)
Power dB(A) (H/M/L)
Model
Shaft
Speed (RMP, H/M/L)
Output (W)
Input (W)
Capacitor (uF)
Type-Piece
Diameter x Width (In.)
Model
Piece
Output (W)
Type-W
PCB/Transformer
Type
Color
Sealed by Dry Nitrogen
Flare/Nut-Liuqid + Gas
OD (In.)
Installed-Lift (In.)
R410A
Type-Feature
Size WxH (In.) - Qty.
Anti-Mildew Function
Anti-Cold Blowing
Power is Lost/Resumed
If Power is Resumed
Net WxHxD (In.)
Package WxHxD (In.)
Net (LBs)
Packaged (LBs)
20'/40'/40'HQ
Items
Power Supply
Cooling Capacity (Btu/h)
Heating Capacity (Btu/h)
SEER
HSPF
Duhumidifying Capacity
Air Flow (CFM)
Air-throw (Ft.)
External Static Pressure
Sound Level
Fan Motor
Fan Wheel
Swing/Step Motor
Input Power of Ele. Heater
Electrical Protection Fuse
Evaporator Coil
Copper Line Connections
Drain Hose Connection
Condensate Pump
Refrigerant Environmental Friendly
Filter
Clean Coil Surface
Pre-heating Function
Memory of Previous Set-ups
Auto-Restart Function
Unit Dimensions
Unit Weight
Loading Capacity
24K

BRIEF UNIT INFO
P12 OF 36P11 OF 36 YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World !YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World !
NOTE: AP2 is optional accessory. If AP2 and AP3
are connected to the unit at the same time, the
default device will be AP2
WIRING DIAGRAMS
WMMS-09EU-V2B(59)2 / WMMS-12EU-V2B(59)2 / WMMS-18EU-V2B(59)2 / WMMS-24EU-V2B(59)2
BRIEF UNIT INFO
UNIT DIMENSIONS
WIRING DIAGRAMS
H
D
W
WMMS-09EU-V2B(59) / WMMS-12EU-V2B(59) / WMMS-18EU-V2B(59)
Generation 1
Generation 2
W H D
48 27.4 9.37
33 27.4 9.37
Fuse on PCB
230V for field install
condensate pump
230V for field install
condensate pump
Fuse on PCB

INSTALLER'S
INSTRUCTION
INSTALLER'S
INSTRUCTION
P13 OF 36 P14 OF 36
YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World !YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World !
Wrapping tape
Side Panel
Refrigerant pipes
and wires
Lineset cover
PART NAMES AND THEIR FUNCTIONS
LED lights
1) POWER:
On/Off system running/stop. Flashs when
system falls in protection state.
2) COOL:
On/Off the operation of cool ON/OFF.
3) HEAT:
On/Off the operation of heat ON/OFF.
Remote Control
INSTALLATION INSTRUCTION
RECOMMENDED TOOLS FOR INSTALLATION
1) Mounting Indoor & Outdoor
Units and Running
Piping/Wiring
Ruler (Not Shown)
Stud-Finder
Dry-Wall Saw
Electric Drill
3" Hole Saw
Drill Extension
Hammer Drill and Bit (Not Shown)
Measuring Tape
Level
Flash Light
Screw Driver (Phillps and Flat)
Hammer
Knife
Scissors
Goggled Glass
Mask
Gloves
Ladder
2) Refrigeration Related Work
3) Electrical Related Installation
Flat Surface Wrentch (Two)
Flare-Nut Tool Set (Not Shown)
Hex Head Key Set
Torch for AC Application (Not Shown)
Heat Absorbtion Flux
Nitrogen (Not Shown)
Soap Bubble (Not Shown)
Vacuum Pump
Helium Leakage Check (Not Shown)
Manifold
Wire Cutter
Wire Stripper
Sharp Plier
Cable Ties
Black Tape for Electrical Use
lectrical Meter
Clamp Meter (Not Shown)
Manifold
Infra Thermometer (Not Shown)
4) Trial Running Units and
Inspection
INLTS STRT
COUP COUP-H OFST
ELBF9
ELBF4
SOFT
TEE ENDF RDER
Not to damage line sets.
LINESET COVERS

INSTALLER'S
INSTRUCTION
INSTALLER'S
INSTRUCTION
P15 OF 36 P16 OF 36
YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World !YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World !
DRAIN PIPING WORK
Drain piping
* The drain pipe connection can be either on the right
rear or right side.
* The inside diameter of the drain pipe should be
equal to or slightly bigger than the outside diameter
of the connecting pipe.
* Keep the drain pipe as short as possible and incline
downwards at a gradient of at least 1/100 to
prevent air pockets.
* Use the drain hose and clamp that come with the
indoor unit. Insert the drain hose completely into the drain connector on the indoor unit. Tighten the clamp (Fig.2, 3).
*Wrap the sealing pad over the clamp and drain hose.insulate to
* Not to fold drain hose (Fig.3).
Check for smooth drainage after the piping work is done
* Pour water into the drain pan from the air outlet to check for smooth drainage (Fig.4).
(When drain hose is connected)
Incline the drain hose
Not to be lifted
No folding
Not to be soaking in
water
Fig.1
Tighten clamp
Drain hose
Taping area
Rising
Fig.2 Fig.3 Fig.4
Air outlet
Carefully pour
water into
drain pan
REFRIGERANT PIPING WORK
3/8"
1/2"
1/2"
WMMS-12EU-V2B(59)
WMMS-18EU-V2B(59)
WMMS-09EU-V2B(59)
Connecting indoor unit
* Before connecting indoor unit, need to check if the indoor unit seals well. Dry nitrogen is loaded inside the indoor
unit before being packed at factory. If you hear the nitrogen gas blasting out of the broken seal, that means the
indoor unit is sealed. Otherwise, need to recharge with nitrogen and recheck. If you still don't hear any noise,
that means there is leaking somewhere inside the indoor unit. Could use soap bubble or helium detector to find
the leaking points. You must fix the leaking point before recycling. Only mount the indoor unit after the indoor unit
has passed a leak check. It will not be easy to fix the leaking, after the indoor unit is hung and connected. Better
to find and fix the leaking points before hanging and connecting it.
* Connect the inter connecting pipes to the indoor unit following general refrigeration piping practices.
Select copper pipes per the following table.gas and liquid
To keep dust and moisture out, both ends of copper
pipe must be fully covered, before putting insulation
on and coiling it.
In selecting pipe running path, need to avoid as many bends as possible. If it is necessary, the bending radius
must be more than 1.5" or 2".
MODEL LIQOLID PIPE GAS PIPE
1/4"
1/4"
Gas pipe and liquid pipe insulation must be no less than 3/8".
In field installation, must check and keep the two ends of each copper pipe fully covered, to protect against any
foreign substances potentially entering the pipe and contaminating the refrigerant system.
Heat insulation layer Connecting wire
Heat insulation layer
Gas pipe Liquid pipe
Pipe wrapping tape Dia. drain pipe 1/2"
INSTALLATION OF INDOOR UNIT
WARNING: The unit must be installated and maintained by licensed HVAC Technician.
SELECTION OF INSTALLATION LOCATION
* Where cool air can be distributed throughout the room.
* Where condensation water is easily drained out.
* A place that can handle the weight of indoor unit.
* Not in laundry, nor in exhaust area.
* Where access for maintenance, is not blocked.
CAUTIONS-NOT INSTALL UNIT AT
* Where there is too much of in the area.
* Where there is high levels of acid or acidity exists.
* Where there is electrical supply.
INSTALLING LOCATION OPTIONS
* Ceiling
* Floor (Against wall, or stand alone)
* Unlock the return air grille by pressing the locking
latch shown at the right. Take out optional
accessories and access to wiring terminal.
* Unscrew to take off the side panel.
Template
23.6"
or more
23.6"
or more
11.8"
or more
39.4"
or more
59.0"
or more
HANGING
In the case of ceiling hanging installation, there is no need to remove hanger bracket from the indoor unit.
Illustration as follows:
BOLT
POSITION INWARD
Celling slab Buried hanging bolt
Hanger bracket
WMMS-24EU-V2B(59)
1/4"
1/4" 5/8"

UNIT OPERATION UNIT OPERATION
P17 OF 36 P18 OF 36
YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World !YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World !
OPTIONAL WALL MOUNT CONTROL (NOT REGULAR THERMOSTAT)
1
2
3
4
5
6
7
8
9
Timer display
Fan speed display (Auto, High, Middle)
Defrosting display
Saving state display
Set temp. display
Ambient temp. display
Fresh air display
Mode (COOL, DRY, FAN, HEAT, AUTO)
Malfunction display
10
11
12
13
14
15
16
17
18
Sleep display
MODE button
Button for temp. increase
Button for temp. decrease
FAN button
SWING button
TIME button
ON/OFF button
Display of swing state
Composition of wire conrtoller
TEST RUNNING
EVALUATION OF THE
PERFORMANCE
* Check voltage.
* Use a thermometer to measure cool air both in and
out.
* The temperature difference between in-air and out-
O
air should not be less than 16 F.
Thermometer
Be sure to use the factory provided accessories list
above in the installation. or it may lead to water
leakage, electric shock, fire, etc.
ACCESSORIES (CHECK FOR ALL
ACCESSORY PARTS PRIOR TO
THE INSTALLATION)
Name Picture
Outdoor drain elbow
Outdoor drain stem
Paper pattern for installaition
Remote controller
Battery
No.
1 1
2 1
3 1
4 1
5 2
6 1
Power connection cord
Qty Specification
AAA 1.5V
H05RN-F 4G1.0
ROUTINE CHECK AFTER INSTALLATION
CHECK AFTER INSTALLATION IS COMPLETED
Items to be checked
Screws are tightened firmly?
Refrigerant leakage test?
Drainage flow is unusual?
The incoming voltage (in accordance with the rated voltage
marked on the nameplate)?
Electrical wiring and piping connection (installed correctly and
securely)?
Grounding connected well or not?
Is the Power cable the right type and size providing a good
protection and connection?
Inlet and outlet been restricted/blocked?
Length of connection pipes and the refrigerant charge adjusted,
matched?
Pipe insulation (thick enough) ?
Possible malfunction or problem
The unit may shake or make noise.
Insufficient refrigerating capacity.
Condensate dripping.
Condensate dripping.
Electric malfunction or damage to the part.
Electric malfunction or damage the part.
Electrical leakage.
Electric malfunction or damage to the part.
Insufficient cooling or heating, damage to parts/unit.
Insufficient capacity.

UNIT OPERATION UNIT OPERATION
P19 OF 36 P20 OF 36
YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World !YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World !
"LIGHT" BUTTON: This allows you to turn the indoor
unit display light on and off. If the light emitted by the
display is bothersome simply press the LIGHT button
on the remote and the display will turn off. To turn the
display back on simply press the light button once
more.
REMOTE CONTROL-BUTTON NAME & FUNCTIONS
"FAN" BUTTON: By pressing this button you can
select from fan speeds AUTO→Low→Middle→High.
When the unit is first powered on the default fan
speed setting is AUTO. When running the unit in
DRY mode the fan speed will only run in low speed.
"CLOCK" BUTTON: The time function runs on a 24
hour clock. To set the time press the clock button
once. You will see a flashing clock appear on the
remote. Press the "+" button to increase the time;
press the "-" button to decrease the time until the
desired time is set. Press the clock button once more
to set the time. You will notice then, the clock symbol
is not flashing.
Note: Under the Dry mode, the fan speed isn't
adjustable, low fan speed is imperative.
High fanHigh fanHigh fan
AUTO
"BLOW" BUTTON: When the blow function is on a symbol on the remote will appear next to left hand corner of
the temp. This feature when turned on, will allow the indoor fan to continue to blow even when the unit is turned
off by the remote. This will aid in the quick drying of the indoor coil to help prevent any kind of mold build up due
to moisture. To turn this feature off simply press the BLOW button once more till you notice the blow icon
disappear from the remote display.
"TURBO" BUTTON: When you press this button you will see a symbol of a fan appear on the remote. In either
heat or cooling mode when this button is pushed the compressor and or fan will blow at a higher speed to
achieve set temp quicker. When the indoor unit senses that the set temp is being approached the fan speed will
slow down. To turn this function off simply press the TURBO button until the fan symbol is no longer displayed on
the remote.
"+" Button: By pressing this button the set temp will increase. If this button is pushed without releasing for over
2 seconds the temperature will increase more rapidly. In AUTO mode the temperature cannot be changed. The
O O
temperature range for this remote is 61 F to 86 F.
"-" Button: By pressing this button the set temp will decrease. If this button is pushed without releasing for over
2 seconds the temperature will decrease more rapidly. In AUTO mode the temperature cannot be changed. The
O O
temperature range for this remote is 61 F to 86 F.
"TEMP" Button: When the unit is first turned on the remote will display the last set temp. When the TEMP button
is pushed twice the indoor unit will display the room temp for approximately 5 seconds before going back to the
set temp.
TO LOCK THE REMOTE: If you would like to lock the remote from anyone changing the settings simply press
the "+" and the "-" buttons simultaneously. When the remote is locked you will see an icon of a lock appear on the
remote. If while the remote is locked and someone pushes a button on the remote they will see the icon of the
remote flash three times. This indicates the remote is locked. To unlock the remote simply press the "-" and the
"+" once more. You will know the remote is unlocked once the icon of the lock disappears from the remote screen.
O O
SWITCH BETWEEN F AND C : The remote default is Fahrenheit. If you would like to switch between the remote
displaying Fahrenheit and Celsius the MODE and the "-" button simultaneously while the unit is turned off.
"TIMER ON" BUTTON: This button allows you to set a time you would like the unit to turn on. The clock is a 24
hour clock. Press the TIMER ON button once and you will see the word "on" flashing next to a time displayed. By
pressing either the + or the - button choose the time you would like the unit to turn on. Once you have the desired
time displayed on the remote press the TIMER ON button once more and the word ON will stop blinking and stay
on the remote. The time you would like the unit to turn on is now set.
"TIMER OFF" BUTTON: This allows you to set the time that you would like the unit to shut off. Simply follow the
above steps but this time press the TIMER OFF button instead of the TIMER ON button. When the word OFF is
set on the remote screen, the time you would like the unit to turn off is now set.
REMOTE CONTROL-BUTTON NAME & FUNCTIONS
LCD
Display
ON/OFF
FAN
CLOCK
BLOW
TURBO
MODE
INCREASE
(Temp.,Time)
TIMER ON
TIMER OFF
LIGHT
SLEEP
TEMP
U-TOUCH NOT USED
"ON/OFF" BUTTON: Press this button to turn the
unit on. Press once more to turn the unit off. When
turning the unit ON/OFF, the TIMER, and SLEEP
functions will be canceled. The preset time will remain.
"MODE" BUTTON: By pressing this button you can
choose what mode you would like the unit to run in.
When the remote is first turned on the mode
displayed will be the AUTO mode. The temperature
cannot be adjusted in this mode and will not display
on the indoor unit. This is a factory preset
O
temperature of 78 F. Under HEAT mode the initial set
O O
temp will be 82 F (28 C). Under other mode the
O O
initial set temp will be 77 F (25 C).
"SLEEP" BUTTON: This function will increase or
decrease the set temp depending on what mode the
unit is running in. When SLEEP mode is turned on in
cooling mode the temp will automatically increase
0.5 to 1.0 degree once every half to one hour for
several times over a period of 2 hours and remain at
that temperature until SLEEP mode is turned off.
When SLEEP mode is turned on in heating mode the
set temp will automatically decrease 0.5 to 1.0
degree once every half to one hour for several times
over a period of 2 hours and remain at that
temperature until SLEEP mode is turned off. This way
when the unit is SLEEP mode during cooling the fan
will blow at a lower speed to accommodate for the
decreased cooling load due to less activity and a
lower outdoor temp. The same principle of savings is
applied to heat mode.
To activate the sleep mode press the SLEEP button
once. You will see a picture of a moon and stars in
the lower left hand corner. To turn off the SLEEP
mode simply press the button once more and the
moon and stars will disappear from the remote screen.
SWING
DECREASE
(Temp.,Time)
IR Control Signal Transmitting
The COOL mode SLEEP profile is as follows:
Temp.
Ts+2
Ts+1
Ts+1/2
Ts
01/2 1 2
Hours since sleep set
1(hr)
SLEEP set offSLEEP set on
The HEAT mode SLEEP profile is as follows:
Temp.
Ts-3
Ts-2
Ts-1
Ts
01/2 1 2
Hours since sleep set
1(hr)
SLEEP set offSLEEP set on
1/2 1 2
NOTE1: This is a general use remote control and can be used for numerous air conditioner styles and models.
There may be some buttons on the remote that are not for use with the unit purchased. When these buttons are
pressed you may hear a beep sound emitted from the remote. This will not affect the unit staus.
NOTE2: Be sure there are no obstructions between the indoor unit and the remote control. Do not drop or allow
any liquids near the remote. Do not place the remote in direct sunlight or any place that can become very hot.

UNIT OPERATION UNIT OPERATION
P21 OF 36 P22 OF 36
YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World !YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World !
REMOTE CONTROL-BUTTON NAME & FUNCTIONS
SYMBOL DISPLAY
When power is first applied to the unit but the power has not been turned on by the remote control, then the red
power light only is displayed. When the unit has been powered on by the remote control then the running LED is
lit and the current running mode symbol is displayed at the same time.
COOLING: Running symbol and cooling symbol are lit.
HEATING: Running lamp and heating symbol are lit.
DRY: Running lamp and dry lamp are lit
FAN: Running lamp and fan lamp are lit.
AUTO: Auto lamp, running lamp and actual running mode are lit.
ALPHA NUMERIC DISPLAY
O O
* The setting temperature range for the unit is 61 to 86 F.
O O
* Under AUTO mode unit will display 77 F for cooling and 68 F for heating modes.
MAINTENANCE
AT THE START OF THE SEASON DURING THE OFF SEASON
* Check that nothing blocks the air inlet and outlet of
the indoor and outdoor units.
* Running the unit without air filters can cause
malfunctions due to dirt or dust. Always install air
filters at all times.
* Check that drainage hose is not bent or clogged.
* Check that the units are properly installed.
* Cut off the power supply main switch.
* Clean the enclosure.
* Leave the fan running for 2-3 hours to dry out the
inside of the unit.
* Do not use benzine gasoline, thinners or polishing
products for cleaning.
O
* Do not wash with hot water(above 104 F ),Some
parts of the unit may be deformed.
Before inspection and maintenance of the unit, always set the power switch to "OFF" to cut off the power supply.
CLEANING THE AIR FILTERS
The air filter must be cleaned by profressional.
CLEANING THE UNIT THE ENCLOSURE
Clean the enclosure of the air conditioner and the
remote control with dry cloth or a vacuum
cleaner. If damp cloth is used, remove molsture
by using dry cloth afterward.
Once the U-TOUCH stars appear, the remote will send a signal of the remote-local temperature to the indoor unit,
and this remote-local temperature will supersede the return air temperature as the unit's target temperature.
Every 10 minutes such signal will be sent from the remote to the indoor unit updating the remote-local
temperature. If at any time during this process no signal is received by the indoor unit from the remote, the unit
will switch back to the previously set temperature before the U-TOUCH feature is activated. To turn the U-
TOUCH feature off, simply press the U-TOUCH button until you see the symbol disappear from the remote
screen. By doing so, the return air temperature will take place of remote-local temperature as the unit's target
temperature. U-TOUCH is what YOU WANT. U-TOUCH feature brings to you a true comfort level wherever and
whenever you want.
REMOTE CONTROL-BUTTON NAME & FUNCTIONS
"SWING" BUTTON: Hold the swing button (symbol
shown above) for more than 2 seconds and the
indoor air louver will start to swing between the
highest and lowest limits. Once the swing button is
released the louver will stay in the last position where
the button was released.
If the swing button is pushed just once the swing icon
will appear on the remote and the louver will swing
up and down continuously between the highest and
lowest points. Push the swing button once more and
the icon will disappear on the remote and the louver
will remain at the last point the button was pushed.
When the unit is powered off by the remote the louver
will close on the indoor unit.
Press this button to set up the desired swing angle
which circularly changes as below.
"U-TOUCH" BUTTON: Since the indoor unit is normally mounted high up on the wall or attached to the ceiling, the
temperature at where the return air sensor is installed inside the indoor unit is higher than what it is where the
area people stand and can feel (4 to 7 feet above the floor). If the unit uses the return air temperature as its
target control, people may feel colder than what they really want (target) in both cooling mode and heating mode.
The facts of air stratification and warm air rising and cold air dropping require users to set up, by experiments or
experience, the target temperature quite few degrees higher than what you really want , in order to reach a
satisfied or more precise indoor comfort. This is a common drawback of AC/HP units made by other manufacturers.
With YMGI's U-touch feature, this can be avoided and your comfort level can be improved.
When you press the U-TOUCH button on the remote control, the unit will use the temperature where the remote
is located as its target temperature control. Once you do so, you will notice a figure of a person surrounded by
stars appear on the remote.
"SWING UP AND DOWN" BUTTON
Press this button, to set up swing angle,
circularly changes as below:
which
This is an universal use remote control. If remote
control sends the following three kinds of status
that the swing status of main unit will be:
When the guide louver start to swing up and down, if
turn off the Swing, the air guide louver will stop at
current position.
which indicates the guide louver swings up and
down between that all five positions.
H1
T
H2
Warmer
Colder
Warm air rises
Cold air drops
T+△
Temp sensor
Wall mount indoor unit
"U-Touch" Feature Is Activated:
"U-Touch" Feature Is NOT Activated:
Roof
Floor
Signal (communication)
Remete control
(Temp sensor)
T
H1
T
Roof
Floor
(Feel More
Comfortable)
(May Feel Colder than
You Want in Summer
and Winter)

UNIT OPERATION UNIT OPERATION
P23 OF 36 P24 OF 36
OPERATING GUIDE
* To distribute cool air throughout the room, adjust air
flow directions shown by the arrows (see picture)to
diffuse cool air.
* The temperature should not be set lower than what
you need. This would lead to increase energy cost.
* Close window and door while operating the unit to
prevent leakage of cooled air and save energy.
In case of ineffective ventilation, open the window to
ventilate the room air once in a while but not too long
since cooled air will be uselessly drained out.
Draw close curtains or close glass windows when
cooling to prevent heat load from sun light which may
cause more electricity cost.
YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World !YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World !
PRECAUTIONS
Do not locate a heater or any other heat source
close to the unit. The heat may deform plastic parts.
Turn off the air conditioner if, while running, electricity
interference occurs, if the unit is not to be used for a
long time, cut off the power supply main switch.
Do not locate any obstacle against the air flow
direction of indoor and outdoor unit. Inefficient
performance or malfunction may result.
Do not channel the air flow directly at people,
especially infants, aged persons, or patients.
Do not insert objects into the air inlet or outlet when
the air conditioner is running as it may cause
damage or personal injury. Also pay special attention
when children are around. The appliance should not be used by children without
supervision.

P26 OF 36
PROTECTION AND ERROR CODES
Blink once
Twice E2
Three times E3
Four times E4
Five times E5
Six times E6
Seven times E7
fifteen times C5
Three times H3
H4
H5
HC
System Unit malfunction Four times
IPM modular protection-unit stops Five times
PFC protection-unit stops Six times
Compressor malfunction Seven times
Water spill protection Eight times
Indoor ambient temp. sensor malfunction Blink once F1
Indoor pipe temp. sensor malfunction
Outdoor ambient temp. sensor malfunction Three times F3
Outdoor pipe temp. sensor malfunction Four times F4
Outdoor air exhaust temp. sensor malfunction Five times F5
E2 PROM Error Eleven times HA
Wire controller ambient temp. sensor malfunction
Twice F2
Blink once
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
Compressor high pressure protection-unit stops E1
Meaning LED
(Red)
LED
(Yellow)
LED
(Green)
Indoor unit anti-freezing protection
Low-pressure protection-unit stops
Air exhaust protection-unit stops
Over current protection-unit stops
Communication malfunction-unit stops
Unit modes conflict
Jumper malfunction
9 Defrosting /Heating oil return
Compressor overload protection-unit stops
Blink once H1
LED
( )
When the unit is controlled by cabled controller, fault indication and error displays
Fault code Meaning Error code display
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
Compressor high pressure protection unit stop
Indoor unit anti-freezing protection
Low-pressure protection unit stop
Air exhaust protection unit stop
Over current protection unit stop
Communication malfunction unit stop
Unit modes conflict
Jumper malfunction
Defrosting /Heating oil return
Compressor overload protection unit stop
System Unit malfunction
IPM modular protection unit stop
PFC protection unit stop
Compressor malfunction
Water spill protection
Indoor ambient temp. sensor malfunction
Indoor pipe temp. sensor malfunction
Outdoor ambient temp. sensor malfunction
Outdoor pipe temp. sensor malfunction
Outdoor air exhaust temp. sensor malfunction
E2 PROM Error
Wire controller ambient temp. sensor malfunction
E1
E2
E3
E4
E5
E6
E3
E3
defrost
E5
F2
E5
E5
E9
E9
F0
F1
F3
F2
F4
E3
F5
YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World !
UNIT MAINTENANCE & SERVICE GUIDE
UNIT MAINTENANCE & SERVICE GUIDE
P25 OF 36
YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World !
GENERAL PROCEDURES
1) Preparation before maintenance
Step 1: Firstly, confirm the model of the inverter A/C which needs repairing, and then find out model of main
parts that can be damaged easily and the material encode, especially the controller of outdoor unit;
Step 2: Basing on the malfunction phenomenon reflected by user, judge the parts which needs for replacing
initially, and bring those parts with you for maintenance.
Step 3: As for repairing the inverter A/C, you should not only bring the common tools, such as screwdriver,
wrench, etc, but also you should bring universal meter and ammeter with you.
2) During the maintenance, don't touch any terminals before the voltage between P and N of power module is
measured less than 50V to avoid electric shock.
3) Before or after the maintenance, you should check whether the users' power socket, terminal block on indoor/
outdoor unit and all connectors on main board (especially the main board of outdoor unit, power module and
PFC module) are loosened or not.
CHECKING UNITS PRIOR TO CONTACTING YOUR TECHNICIAN

UNIT MAINTENANCE & SERVICE GUIDE UNIT MAINTENANCE & SERVICE GUIDE
P27 OF 36 P28 OF 36
YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World !YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World !
Protection and Error Code List - Summary
When there's malfunction or protection for A/C, the display screen of indoor unit or LED will display
corresponding code and LED on main board of outdoor unit will also have warnings. Please refer to the function
parts as before for details. When protection or malfunction has been eliminated, the display will resume normal
status.
Protection and Error Code Name
Red light
(running
LED)
Yellow light
(heating
LED)
Green light
(cooling
LED)
Floor
ceiling
dual 8
Display of
wired
controller
Display of wired
controller for
duct type unit
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
High pressure protection of system
Antifreezing
Low pressure protection of system
Discharge protection
Low voltage overcurrent protection
Communication malfunction
Mode shock
Malfunction of jumper cap
Defrosting/heating oil return
Overload protection of comrpessor
System is abnormal
Module protection
PFC protection
Out-of-step malfunction of compressor
including erase malfunction
Water overflow protection
Indoor ambient temperature sensor is
open circuit or short circuit
Indoor evaporator temperature sensor is
open circuit or short circuit
Outdoor ambient temperature sensor is
open circuit or short circuit
Outdoor condenser temperature sensor
is open circuit or short circuit
Discharge temperature sensor is open
circuit or short circuit
The reserved outdoor unit displays E2
Malfunction of ambient temperature
sensor on wire controller
Blink once
Blink twice
Blink 3 times
Blink 4 times
Blink 5 times
Blink 6 times
Blink 7 times
Blink 15 times
Blink once
Blink 3 times
Blink 4 times
Blink 5 times
Blink 6 times
Blink 7 times
Blink 8 times
Blink once
Blink twice
Blink 3 times
Blink 4 times
Blink 5 times
Blink 11times
Blink 5 times
Display the malfunction of indoor ambient temperature sensor
when using this temperature sensor (Green light: blink once)
Yes
Yes
Yes
Yes
Yes
No
No
No
Yes
Yes
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
No
Yes
E1 E1
E2 E2
E3 E3
E4 E4
E5
E6
E7
C5
H1
H3
H4
H5
HC
H7
H8
F1
F2
F3
F4
F5
HA
E1
E6
E2
E3
Defrost
E5
F4
E3
E5
H8
H8
F0
F1
F3
F2
F4
No
F5
Notice:
1) As for cassette type, floor standing type indoor unit, wire controller is optional. If the unit hasn't been equipped
with the wire controller, there's no display malfunction for wire controller.
2) Cassette type unit only has 3 indicators, no dual 8 display.
3) Only the cassette type is with the malfunction of water overflow protection. Floor ceiling type and duct type
indoor fans are without this kind of malfunction.
Troubleshooting method
The jumper cap at the
place of silk screen CN1
on main board of indoor
unit has malfunction.
Please check or replace
the main board of indoor
unit.
Wire
controller
Dual 8
nixietube
Wire
controller
display
method
for duct type
unit
Dual 8 for
floor
ceiling unit
Green light
(cooling LED)
Yellow light
(heating LED)
Red light
(running LED)
Malfunction name
Indicator
No
There's connecting
problem at the place of
silk screen WATER-D on
main board or there's
problem for the water
overflow inspection
device, please check or
replace it.
The temperature sensor
at the place of silk screen
ROOM on indoor main
board has malfunction,
please check or replace
it.
The temperature sensor
at the place of silk screen
TUBE or TUBE-I or
TUBE-O on indoor main
board has malfunction,
please check or replace
it.
Replace the wire
controller.
E3C5
H8H8
Blink 8 times
F0F1
Blink once
F1F2Blink twice
F5
Display the malfunction of indoor ambient temperature
sensor when using this temperature sensor.
(Green light: blink once)
Blink 15 times
Malfunction of jumper cap
Water overflow protection
Indoor ambient
temperature sensor is
open circuit or short
circuit
2
1
3
4
5
Indoor evaporator
temperature sensor is
open circuit or short
circuit
Malfunction of ambient
temperature sensor on
wire controller
TROUBLE-SHOOTING GUIDE
PROTECTION AND ERROR CODES

MUST READ-2
P29 OF 36 P30 OF 36
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MUST READ-2
QUESTIONS ABOUT SELF-INSTALLATION VS HIRING LICENSED HVAC
TECHNICIANS
CUSTOMER AND TECHNICIAN MUST READ
1) You understand all that is written hereafter in this and other documents that we publish.
2) You will follow what is written hereafter in this and other documents that we publish.
3) You will be bound by and completely follow all policies, guidelines, instructions, warnings, attentions and other
materials, as published by YMGI Group, its subsidiaries or sister companies, in writing.
4) Only a successful installation, fully (100%) conducted by a qualified HVAC technician(s), as detailed in the
checklist of the Limited Product Warranty Policy and Limited Product Warranty Registration Card/Form,
along with a properly detailed installation invoice, is eligible for the Limited Product Warranty.
5) Failure to follow what is written hereafter may cause various equipment issues that you will take full
responsibility and liability for, including, but not limited to, losing manufacturer's warranty, unit not working
properly, unit malfunctions, under-performance, decreased safety, increased potential of various damages to
your property, body, home and/or business, etc.
6) YMGI documents and policies supersede those made or provided by the sales distributors or installing
contractors. YMGI Group maintains the final authority in explaining and resolving any and all discrepancies
that might exist between distributors/contractors' documents and ours.
YMGI STRONGLY RECOMMENDS:
* Customer hires a currently licensed/ certified HVAC technician(s) (N.A.T.E. or A.C.C.A certification is strongly
recommended) to conduct 100% of the installation, inspection of all unit functions and repair service.
* Customer signs an installation/service contract with the installation/service technician's company who has good
service references and you trust. Installation and service is very important to the life of your investment and
provide you a lifetime of comfort and peace of mind.
* Customer requests the installer to put down a1-year labor warranty coverage in the installation contract.
* Have the technician check against all the items in the checklist of the Limited Product Warranty Registration
Card/Form, sign and date it, to help ensure a proper and professional installation.
* Customer pays in full, only after all the unit functions are inspected, the unit works properly, warranty checklist
is fully filled out and signed and you are fully satisfied.
* If any unit abnormality is found, have your technician check the unit first. Have them call for manufacturer
technical assistance, if necessary, from your job site, not his office, so that we can more accurately assist him
in diagnosing the cause of the malfunction.
Does YMGI allow to do-it-yourself installations (DIY) partially or fully? NO.
Unfortunately no brand or manufacturer can take the responsibility of the equipment if it is not professionally
installed by a currently licensed HVAC technician/ contractor.
If unit is installed by non-licensed people, in part or fully, will the factory warranty be void? YES.
UPON PURCHASING, OPENING PACKING BOXES AND INSTALLATION OF
YMGI UNITS/ACCESSORIES, YOU AND TECHNICIANS YOU HIRE TO
INSTALL THEM ARE ASSUMED TO HAVE READ ALL MATERIALS AND
AGREE TO FOLLOW AND BE BONDED BY ALL WE SAY IN YMGI MANUALS.
11) If all the suggestions have been taken and all the necessary steps are followed.
12) If the contractor(s)/technician(s) are experienced with the systems/brands you purchase.
You might spend less. But remember, many times you get what you pay for.
13) Sign a contract with them. The contract should list all the detailed work they will conduct and the standards
they will follow. Some contractors are willing to include a 1-year installation/service warranty at no extra
charge. Check with them to see if that is available. If available, include that in the contract.
14) Verify and confirm the installation is done completely and all the unit functions have been checked and are
working properly, all the items in the checklist have been checked and marked well in the warranty registration
card/form, prior to paying the contractor in full.
The cost of not having your unit installed properly can be more expensive than spending little extra money
that hiring the right contractor will cost. Protect your investment and warranty eligibility by doing it right first time.
a
WHY DOES YMGI GROUP REQUIRE INSTALLATION AND SERVICE TO BE
100% PERFORMED BY LICENSED OR CERTIFIED HVAC TECHNICIAN/
CONTRACTOR?
1) They have the training and experience to accurately and safely install and service your equipment.
The equipment runs with high-pressure refrigerant and oil and line-voltage. The copper lines must be installed
properly to prevent leakage and foreign substances from contaminating the refrigerant system.
2) You will save money in the long run. If any problems occur on the unit that is fully installed by the licensed
or certified contractor, they have the training and experience to correct the problem more efficiently. A
technician(s) may be unwilling to repair an issue on a unit that they did not install. If you do find a technician
willing to perform the service, there is an increased possibility of higher service fees than normal, increased
service visits, or delayed service from that technician.
3) It's the law!
The federal, state and/or local government and authorities have various governing laws or regulations,
guidelines, ordinances, etc., requiring only licensed or certified professionals can install and service high
pressure HVAC equipment.
SUGGESTIONS, TO AID YOU IN HIRING AN HVAC CONTRACTOR:
1) Hire a currently, practicing, licensed/ certified HVAC technician/ contractor. Technicians, who are no longer
practicing (retired, etc.) in this field, may not have the updated knowledge or may lack experience on the
equipment you have purchased.
2) Hire a technician/ contractor who services customers in your local area and you are familiar with. Local
contractors have a faster response time and will be easier for you to determine if they are reputable.
3) Use only reputable licensed/ certified HVAC installation contractors/ technicians to prevent any unexpected
charges as a result from unethical business practices.
4) Check their references, to verify they are a good service provider to the general customers. N.A.T.E or A.C.C.A
certified technicians are strongly recommended.
5) Some contractors/ technicians may not feel comfortable about installing the equipment that you purchased for
them to install, and they prefer to purchase and install the equipment. You can contact YMGI directly to check
and see if there have been any contractors in your area who have installed our products or similar.
6) Ask for a detailed quote for the whole installation project. A flat rate quote is the safest contract for both you
and the contractor
7) Your local HVAC technicians may charge you on a project basis or on an hourly basis. To our general
knowledge and experience, a full single head installation may normally cost anywhere from $800 to
$1500. These costs are estimates and your actual costs may differ due to job nature and location.
8) Number of hours can vary depending upon each individual situation, some factors are, but not limited to:
9) How difficult or complex the indoor unit is to be securely installed.
10) How difficult or how long the inter-connecting pipes and wires are to be installed.
CUSTOMER AND TECHNICIAN MUST READ

MUST READ-2 MUST READ-2
F. Charges for your return:
1)A restocking charge of 25% creditable invoice value.
2)All return shipping fees.
3)Additional fees will be charged, if products are found to be damaged, missing or used.
4)YMGI will notify the distributor of the charges only after the inspection and assessment of the returned products
has been completed.
Attention:
1) Returned products must be shipped within 7 days of YMGI's releasing of RGA #.
2) All RGA shipping shall be prepaid by the customer. YMGI will not accept any COD freight.
YMGI GROUP DISCLAIMING-1:
YMGI Group will NOT accept any return, or may not honor 100% credit for any return of Product(s)/Part(s)/
Accessories, in any of the following cases:
* Return requests made 30 or more days after the date of original sales shipping from YMGI Group warehouse.
* Return shipment is initiated 8 days or more after the RGA is approved.
* Returned products received not displaying an YMGI-approved valid RGA #.
* Returned products received C.O.D.
* Returned products not received in the original packaging.
* Returned products received with non-repairable packaging, including duct tape or marks on units or carton
boxes.
* Returned products received with missing units/parts/accessories.
* Returned products received, are found to be non-functional or damaged.
YMGI GROUP DISCLAIMING-2:
* YMGI Group will not be responsible for any losses of returned unit(s)/part(s)/accessories in transition to YMGI
Group warehouse.
* YMGI Group RGA is valid for seven (7) days from the original issuing date. Returns will not be accepted, if
shipping is made 8 or more days after the YMGI Group RGA is issued.
C. YMGI must verify the following before you can pack your products:
1) No products (units, parts, accessories) are missing.
2) No damage is found.
3) The products are in the original packaging.
4) No duct tape on any product or box.
5) Pictures have been taken and sent to YMGI to verify the product and boxes are not damaged.
6) The RGA has been completed and a copy has been returned to YMGI, via email or fax.
7) YMGI has approved the request in writing.
D. Shipping Preparation:
1) Package all products in a manner in which no damage can occur to the product and secure to a pallet.
2) Take and forward pictures of packed pallets for YMGI to verify proper packaging and no existing damage.
3) Include the YMGI approved RGA# in the shipping documents.
4) YMGI reserves the right to approve or deny any shipments.
5) YMGI can arrange shipping for you, but not at YMGI's cost. If this option is chosen, a packing list and BOL will
be issued to you through YMGI.
6) If the above option is not chosen, you will be responsible for all freight charges. YMGI will not accept any
returned items COD.
7) Place the package in an area which is accessible to the shipping company for pickup and limits the possibility
of damage to the product. Customer must be present at the time of freight pick up.
After shipping, fax the BOL to YMGI Group at 1-866-377-3355 or email to [email protected],
detailing the information of the freight company and their tracking number.
E.Freight Damage:
1) YMGI Group will inspect returned items
2) Claiming of freight damage from a customer hired carrier will be the customer's responsibility.
3) Claiming of freight damage from a YMGI hired carrier will be YMGI's responsibility.
CUSTOMER AND TECHNICIAN MUST READ
P32 OF 36P31 OF 36 YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World !YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World !
Some DIY installations have been successful, but these are exceptions. Most have resulted in equipment failure,
due to lack of knowledge and experience. A few of the problems result from DIY's lack of knowledge in the
following areas:
* Sizing and selecting correct type, size and model of cooling and/or heating equipment.
* Sizing and installing correct electric circuit breakers and wires.
* Wiring the units correctly and properly.
* Taping the ends, connecting to indoor and outdoor units correctly and properly.
* Vacuuming the inter-connecting refrigerant lines.
* Checking and/or fixing the refrigerant leaks.
* Checking and/or fixing the condensate drain leaks.
* Releasing the refrigerant from outdoor unit to indoor unit.
* Running the unit to check all the unit functions.
* Conducting the installation or trouble-shooting with correct tools, experience or professional knowledge to
correct the problem.
RECEIVING AND FREIGHT DAMAGE
* Freight (package/unit) shall be checked thoroughly for damage at receiving before accepting by signing on the
carrier's delivery paperwork.
* Upon shipment being signed for acceptance, it becomes a binding document as to the condition of the products
on delivery. We cannot process any shipping damage claim, if you accept the delivery.
* If damage is found at delivery, both you and the delivery driver must make notes on the delivery receipt or other
freight paperwork detailing the damage found by marking position/parts on unit, description of damage, time/
date, your name, contact phone, etc. on the delivery documents. Make a copy of the marked delivery receipt.
CUSTOMER AND TECHNICIAN MUST READ
* If the damage is minor or partial, that you choose to accept, you can contact the distributor or YMGI to discuss
the possible replacement of the damaged part.
* If refusal of the shipment is needed due to severe freight damage, DO NOT sign the carrier's delivery receipt
document indicating that you accept the products. Mark receipt "REFUSED DUE TO FREIGHT DAMAGE."
Sign and date along with the delivery driver's signature and date.
* Take pictures showing the damage, before the delivery driver leaves.
* If you accept the delivery or fail to note damage on the driver's delivery receipt, the ability to claim freight
damage is lost and YMGI will not replace the unit on this basis.
* Contact the distributor or YMGI, report the damage by forwarding the marked delivery receipt copy and pictures.
* Only after YMGI verifies with the carrier the necessary detailed notes of received freight damage, will the
damaged products be eligible for replacement.
* If the returned products are found not damaged, YMGI will treat it as a return and will charge you 25% of
product value plus added shipping cost.
RETURN-YMGI GROUP POLICIES & RETURN GOODS AUTHORIZATION (RGA)
All sales are final. If the customer wishes to return a product, the following Return Policies apply.
A. Only those products (units, parts or accessories) under the following conditions, are eligible for return:
1) Products are returned within 30 days of their original shipment date from YMGI
2) Products have not been installed.
3) No damage exists on the products being returned.
4) No missing products.
5) Products and packages are clean.
6) No duct tape or marking on the product or box.
7) Products are still their original package, in good shape and in re-sellable condition, as YMGI determines.
B. Preapproval steps for your return request:
1) Contact your distributor or YMGI to request a return.
2) Photograph your product and box to show details
3) YMGI will review your request, along with the pictures and any other details pertaining to your request.
4) If YMGI agrees to process your return request, a form called Return Goods Authorization (RGA), along with
an assigned RGA # will be forwarded to your distributor or you.
5) Any return without YMGI Group approved RGA #, will not be accepted.

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Standard factory warranty does not cover the cost of materials and labor that are incurred at your site.
There will be no cost for the replacement unit, if YMGI determines the defect is manufacturer related.
Replacement will be made with the same model, only. Alternate units will be treated as a new order.
CUSTOMER SERVICE / TECHNICAL SUPPORT FROM YMGI GROUP
For questions or help with your unit, contact the original installer or service provider.
YMGI Group does not install nor physically service your unit. Your installer or service provider must check the
unit prior to contacting YMGI Group from your jobsite, in order to be helped in an efficient and timely manner.
* Factory customer service at [email protected] Tel: [phone]x704
* Factory technical support at [email protected] Tel: [phone]x703
* Fax: [phone]
An "YMGI Group Customer Service/Technical Support Daily Log Sheet" will be filed in writing at our office,
for effective communication between you and YMGI Group customer service, your technician and YMGI Group
technical support. Before contacting the YMGI Group locate the IP# written at the top of your warranty registration
form. Use this IP# whenever you contact the YMGI Group.
DISTRIBUTOR AND MANUFACTURER POLICIES
* All questions concerning sales or money will be directed to the sales distributor from which you purchased the
units.
* Read and follow all policies set forth from the distributor from which you purchased your unit.
* Upon purchase and installation of the unit(s), you agree to be bounded by all policies published by both
distributors and YMGI.
* YMGI Group has the final authority and supersedes other related parties (distributors, etc.) concerning all
policies regarding YMGI products.
CUSTOMER AND TECHNICIAN MUST READ
1) The YMGI Limited Product Warranty Policy, details the eligibilities, coverage's and other explanations of the
warranty terms between YMGI group and the unit owner.
2) The YMGI Limited Product Warranty Policy and the Warranty Registration Card/Form are either included
inside the user's manual and/or installation instruction manual, or come separately in the unit packaging box/
envelope. If for any reason they are not included with your shipment, contact our sales or customer service to
request a copy (electronic or printed), prior to installation.
3) The checklist, in the Warranty Registration Card/Form, is for the currently licensed/ certified HVAC technician
to fill out completely, while verifying all unit functions are operating correctly. This checklist is for the technician
to test and check all details of your unit, to verify and ensure its proper operation.
4) The technician must complete all fields in the Warranty Registration Card/Form, especially the unit model
and serial numbers and distributor information, and most importantly, the technician checklist.
5) Warranty Registration Card/Form shall be mailed, along with the original copy of the currently licensed
HVAC contractor's full installation invoice, to YMGI Group, within 7-days after original installation, in order
for YMGI to review and process your warranty registration.
6) Keep a copy of Warranty Registration Card/Form for your own use in the future, to aid in any possible future
warranty claiming, any request of parts, customer service, and/or technical support.
7) YMGI reserves the right to approve or deny the warranty status based on the information reviewed.
YMGI DISCLAIMING-3 (RE: LIMITED PRODUCT WARRANTY)
Mailing address of the Warranty Registration Card/Form: Warranty Department, YMGI Group, POB 1559,
O'Fallon, MO 63366, USA.
DEFECTIVE UNITS / PARTS / ACCESSORIES-REPAIR OR REPLACEMENT
Out of thousands of units sold every year, there may be an occasional instance your product does not operate
properly. Reasons of but are not limited to: manufacturing, installation, operation, maintenance and
knowledge of operator.
The defects might be found before/ during installation or in the operation of the unit. Defects can be in the form
of blown fuse(s), defective control board(s), damaged remote control, loose or missing screws, etc. These
defective parts can be replaced easily.
Some functions of our units are different from what are typical in traditional split type air conditioning and heat
pump systems and similar systems made by other manufacturers. These are not defects. Take some time to
learn the functions of your unit. We will be happy to assist you with any questions you may have concerning the
functions of your new unit.
1. Part repair or replacement after trouble-shooting: This is the most common and generally the easiest and
most economical way for all the needed parts since the problem and all part needs can be accurately and
completely identified.
* Your technician calls our technical support line, from your job site, after checking your units and getting all the information
ready.
* Our technical support will go through several steps, over the phone or through email, with your technician, in order to help
identify and resolve the problems. Normally wiring correction, piping correction, part repair/ replacement will resolve the
problems.
Equipment failure does not automatically denote a product defect from the factory assembly line. The defects can
be caused, during production, transportation, installation, operation, maintenance, or service. Defects may NOT
be the responsibility of the manufacturer. Nobody willfully or intentionally produces a defective product. No
determination shall be made until the technical issue(s) or the causes of the defect(s) are identified.
If a defect is found, whether at the original installation, or during normal operation, we will gladly help you in the
following steps in sequence from 1 to 3:
CUSTOMER AND TECHNICIAN MUST READ
* Your technician will then need to verify and confirm the problem(s) before YMGI can ship out the replacement part(s).
Inaccurate or incomplete troubleshooting or part replacement will delay the repair. YMGI technical support will only speak
with a licensed/certified technician in regards to the repair of your unit. In our experience this saves time and money for
all parties involved.
Your technician is the only person to perform any physical checking, trouble-shooting and replacing of any
defective part(s) for your units. Our factory technical support is just a help. YMGI provides no labor warranty
on the products.
2. Unit/part repair at our workshop(s): Due to the limitations of our technical support not being at your job site,
or your technician's limited experience with our product, the problem may not be resolved as quickly as would
be desired. If the problem is still not resolved after attempts between your technician and our technical support,
you can elect to have the unit repaired at our facility. If this step is chosen:
1) YMGI will send to you the Customer Request to Ship Products to YMGI Service Center for Inspection and Repair,
and Authorization to Charge form.
2) You will review the form and fill all fields appropriately, sign and send back to the YMGI Group.
3) Once the form has been completed and sent back to YMGI, remove the units and ship back to YMGI.
Please make a note describing the problem and communication history, if possible. Our technicians will check the
units and find the problem(s), repair the issue(s), and ship the unit back to you following the conditions set forth in
the signed repair agreement. All unit removal and re-installation is done at your cost and must be done by a
currently valid licensed HVAC technician.
3. Unit replacement: Only applies to those defects reported within 30 days of original purchase date and if all
necessary warranty paperwork had been received and approved. This option applies only if the above steps
cannot resolve the problem(s). Either indoor or outdoor unit replacement is available, based on the actual need,
at YMGI's determination. This option shall be the last resort, due to refrigerant and wiring considerations. All
unit removal, re-installation and shipping cost are the responsibility of the customer. YMGI maintains the final
authority as to unit replacement. Replacement will be made with the same model only. Alternate units will be
treated as a new order.
Returning Replaced Defective Units/Parts/Accessories After Unit Repair: (Only applies to steps 1&3 above)
1) Repack the replaced unit/ part /accessory in the box which contained the replacement part.
2) Parts can be boxed for UPS, FedEx or equivalent ground service. Units shall be secured onto the skid on which the
replacement was shipped after placing into the package from the replacement product.
3) Ship all replaced products, to YMGI-designated location. You will be charged if YMGI does not receive the replaced parts.
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Put down whatever questions you have or problems you have seen as a unit history:
No. Date
USER NOTES
Put down whatever questions you have or problems you have seen as a unit history:
No. Date
USER NOTES AND INSTALLATION/SERVICE/MAINTENANCE NOTES
Notes Asked for Your Technician for Help? Did You Ask YMGI Tech. for Help?
INSTALLATION NOTES
Original Installation Company
Name, Technician Name,
Phone & HVAC License #
Job Not Performed
by Technician
Technician Checklist
Completed Fully?
SERVICE / MAINTENANCE NOTES
No. Date Contents of Service / Maintenance Technician's Company Name, Technician
Name, Phone & HVAC License #