Coast-Air CEPH-121B Service manual

Installation and Operation
Instruction Manual
Portable Room Air Conditioner
CEPH-121B
www.coastair-ac.com

CEPH-121B
Installation and Operation Instruction Manual
2
www.coastair-ac.com
2
Safety Precautions . ...........................................................................................................................................................
Safety Precautions
Installation Instructions
Operating Instructions
Maintenance
Table of Contents
Control Panel Features......................................................................................................................................................
Operation Instructions......................................................................................................................................................
Other features......................................................................................................................................................................
Safety Precautions..............................................................................................................................................................
Air Filter Cleaning ..............................................................................................................................................................
Troubleshooting Tips .......................................................................................................................................................
Unit Cleaning ......................................................................................................................................................................
Store the unit when not in use .....................................................................................................................................
Preparation............................................................................................................................................................................
Design Notice.......................................................................................................................................................................
Energy Rating Information .............................................................................................................................................
Ambient Temperature Range For Unit Operating..................................................................................................
Exhaust Hose Installation.................................................................................................................................................
Choosing The Right Location..........................................................................................................................................
Tools Needed........................................................................................................................................................................
Accessories.............................................................................................................................................................................
Window Installation Kit.....................................................................................................................................................
Installation..............................................................................................................................................................................
Troubleshooting Tips
03
11
11
12
12
12
12
13
13
14
16
18
19
20
22
22
22
22
23

CEPH-121B
Installation and Operation Instruction Manual
3www.coastair-ac.com
3
Safety Precautions
Safety
Read Safety Precautions Before Operation and Installation
To prevent death or injury to the user or other people and property damage, the
following instructions must be followed. Incorrect operation due to ignoring of
instructions may cause death, harm or damage.
WARNING
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Safety Precautions
 Page 3
WARNING CAUTION
This symbol indicates the possibility of
property damage or serious consequences.
Installation must be performed according to the installation instructions. Improper installation
can cause water leakage, electrical shock, or fire.
Use only the included accessories and parts, and specified tools for the installation. Using non-
standard parts can cause water leakage, electrical shock, fire, and injury or property damage.
Make sure that the outlet you are using is grounded and has the appropriate voltage.
The power cord is equipped with a three-prong grounding plug to protect against shock.
Voltage information can be found on the nameplate of the unit.
Your unit must be used in a properly grounded wall receptacle. If the wall receptacle you
intend to use is not adequately grounded or protected by a time delay fuse or circuit breaker
(the fuse or circuit breaker needed is determined by the maximum current of the unit. The
maximum current is indicated on the nameplate located on unit), have a qualified electrician
install the proper receptacle.
Install the unit on a flat, sturdy surface. Failure to do so could result in damage or excessive
noise and vibration.
The unit must be kept free from obstruction to ensure proper function and to mitigate safety
hazards.
Do not modify the length of the power cord or use an extension cord to power the unit.
Do not share a single outlet with other electrical appliances. Improper power supply can
cause fire or electrical shock.
Do not install your air conditioner in a wet room such as a bathroom or laundry room. Too
much exposure to water can cause electrical components to short circuit.
Do not install the unit in a location that may be exposed to combustible gas, as this could
cause fire.
The unit has wheels to facilitate moving. Make sure not to use the wheels on thick carpet or to
roll over objects, as these could cause tipping.
Do not operate a unit that has been dropped or damaged.
The appliance with electric heater shall have at least 3 feet space to the combustible
materials.
Do not touch the unit with wet or damp hands or when barefoot.
If the air conditioner is knocked over during use, turn off the unit and unplug it from the main
power supply immediately. Visually inspect the unit to ensure there is no damage. If you
suspect the unit has been damaged, contact a technician or customer service for assistance.
This symbol indicates the possibility of
personnel injury or loss of life.

CEPH-121B
Installation and Operation Instruction Manual
4
www.coastair-ac.com
4
Safety Precautions
 Page 4
•
•
•
•
In a thunderstorm, the power must be cut off to avoid damage to the machine due to lightning.
Your air conditioner should be used in such a way that it is protected from moisture.
e.g. condensation, splashed water, etc. Do not place or store your air conditioner where it can
fall or be pulled into water or any other liquid. Unplug immediately if it occurs.
All wiring must be performed strictly in accordance with the wiring diagram located inside of
the unit.
The unit's circuit board(PCB) is designed with a fuse to provide overcurrent protection. The
specifications of the fuse are printed on the circuit board, such as: T 3.15A/250V, etc.
•
•
•
•
•
•
•
•
•
•
•
•
•
•
CAUTION
•
•
•
This appliance can be used by children aged from 8 years and above and person with reduced
physical, sensory or mental capabilities or lack of experience and knowledge if they have been
given supervision or instruction concerning use of the appliance in a safe way and understand
the hazards involved. Children shall not play with the appliance. Cleaning and user maintenance
shall not be made by children without supervision. (be applicable for the European Countries)
This appliance is not intended for use by persons (including childern) with reduced physical,
sensory or mental capabilities or lack of experience and knowledge, unless they have been
given supervision or instruction concerning use of the appliance by a person responsible for
their safety. Children should be supervised to ensure that they do not play with the appliance.
Children must be supervised around the unit at all times.(be applicable for other countries
except the European Countries )
If the supply power
cord is damaged, it must be replaced by the manufacturer,its service agent
or similarly qualified persons in order to avoid a hazard.
Prior to cleaning or other maintenance, the appliance must be disconnected from the supply mains.
Do not remove any fixed covers. Never use this appliance if it is not working properly, or if it has
been dropped or damaged.
Do not run power
cord under carpeting. Do not cover power cord with throw rugs, runners, or
similar coverings. Do not route power
cord under furniture or appliances. Arrange power cord
away from traffic area and where it will not be tripped over.
Do not operate unit with a damaged power
cord, plug, power fuse or circuit breaker. Discard
unit or return to an authorized service facility for examination and/or repair.
To reduce the risk of fire or electric shock, do not use this fan with any solid-state speed control device.
The appliance shall be installed in accordance with national wiring regulations.
Contact the authorized service technician for repair or maintenance of this unit.
Contact the authorized installer for installation of this unit.
Do not cover or obstruct the inlet or outlet grilles.
Do not use this product for functions other than those described in this instruction manual.
Before cleaning, turn off the power and unplug the unit.
Disconnect the power if strange sounds, smell, or smoke comes from it.
Do not press the buttons on the control panel with anything other than your fingers.
Do not operate or stop the unit by inserting or pulling out the power cord plug.

CEPH-121B
Installation and Operation Instruction Manual
5www.coastair-ac.com
5
Safety Precautions
 Page 5
Note about Fluorinated Gasses(Not applicable to the unit using R290 Refrigerant)
1.
Fluorinated greenhouse gases are contained in hermetically sealed equipment. For specific
information on the type, the amount and the CO2 equivalent in tons of the fluorinated
greenhouse gas(on some models), please refer to the relevant label on the unit itself.
2. Installation, service, maintenance and repair of this unit must be performed by a certified
technician.
3. Product un-installation and recycling must be performed by a certified technician.
•
•
•
•
•
Do not use hazardous chemicals to clean or come into contact with the unit. Do not use the unit
in the presence of flammable substances or vapor such as alcohol, insecticides, petrol,etc.
Always transport your air conditioner in a vertical position and stand on a stable, level surface
during use.
Always contact a qualified person to carry out repairs. If the damaged power supply cord must
be replaced with a new power supply cord obtained from the product manufacturer and not
repaired.
Hold the plug by the head of the power plug when taking it out.
Turn off the product when not in use.
WARNING for Using R32/R290 Refrigerant
Do not use means to accelerate the defrosting process or to clean, other than those recommended by
the manufacturer.
The appliance shall be stored in a room without continuously operating ignition sources (for example:
open flames, an operating gas appliance or an operating electric heater).
Do not pierce or burn.
Be aware that the refrigerants may not contain an odor.
Appliance should be installed, operated and stored in a room with a floor area according to the amount
of refrigerant to be charged. For specific information on the type of gas and the amount, please refer to
the relevant label on the unit itself. When there are differences between the label and the manual on
the Min. room area description, the description on label shall prevail.

CEPH-121B
Installation and Operation Instruction Manual
6
www.coastair-ac.com
6
Safety Precautions
Page 6 
Compliance with national gas regulations shall be observed.
Keep ventilation openings clear of obstruction.
The appliance shall be stored so as to prevent mechanical damage from occurring.
A warning that the appliance shall be stored in a well-ventilated area where the room size corresponds
to the room area as specified for operation.
Any person who is involved with working on or breaking into a refrigerant circuit should hold a current
valid certificate from an industry-accredited assessment authority, which authorizes their competence
to handle refrigerants safely in accordance with an industry recognized assessment specification.
Servicing shall only be performed as recommended by the equipment manufacturer. Maintenance and
repair requiring the assistance of other skilled personnel shall be carried out under the supervision of
the person competent in the use of flammable refrigerants.
Please follow the instructionscarefully to handle, install, clear, and service the air conditioner to avoid
any damage or hazard. Flammable Refrigerant R32 is used within the air conditioner.When
maintaining or disposing of the air conditioner,the refrigerant (R32) shall be recovered properly,shall
not discharge into the air directly.
No open fire or device like switch which may generate a spark/arcing shall be around the air
conditioner to avoid causing ignition of the flammable refrigerant used.
Please follow the instructionscarefully to store or maintain the air conditioner to prevent mechanical
damage from occurring.
Flammable refrigerant -R32 is used in the air conditioner. Please follow the instructionscarefully to
avoid any hazard. For specific information on the type of gas and the amount, please see the relevant
label on the unit itself.

CEPH-121B
Installation and Operation Instruction Manual
7www.coastair-ac.com
7
Safety Precautions
Page 7 
1.Transport of equipment containing flammable refrigerants:
See transport regulations.
2.Marking of equipment using signs:
See local regulations.
3.Disposal of equipment using flammable refrigerants:
See national regulations.
4.Storage of equipment/appliances:
The storage of equipment should be in accordance with the manufacturer's instructions.
5.Storage of packed (unsold) equipment:
Storage package protection should be constructed such that mechanical damage to the equipment
inside the package will not cause a leak of the refrigerant charge. The maximum number of pieces of
equipment permitted to be stored together will be determined by local regulations.
6.Information on servicing:
1)Checks to the area:
Prior to beginning work on systems containing flammable refrigerants, safety checks are necessary to
ensure that the risk of ignition is minimized. For repair to the refrigerating system, the following
precautions shall be complied with prior to conducting work on the system.
2)Work procedure:
Work shall be undertaken under a controlled procedure so as to minimize the risk of a flammable gas
or vapor being present while the work is being performed.
3)General work area:
All maintenance staff and others working in the local area shall be instructed on the nature of work
being carried out. Work in confined spaces shall be avoided. The area around the workspace shall be
sectioned off. Ensure that the conditions within the area have been made safe by control of flammable
material.
4)Checking for presence of refrigerant:
Explanation of symbols displayed on the unit(For the unit adopts R32 Refrigerant only):
WARNING
CAUTION
CAUTION
CAUTION
This symbol shows that this appliance used a flammable refrigerant. If the refrigerant
is leaked and exposed to an external ignition source, there is a risk of fire.
This symbol shows that the operation manual should be read carefully.
This symbol shows that service personnel should be handling this equipment
with reference to the installation manual.
This symbol shows that information is available such as the operating manual or
installation manual.
Caution: Risk of fire/
flammable materials
(Required for R32 units only)

CEPH-121B
Installation and Operation Instruction Manual
8
www.coastair-ac.com
8
Safety Precautions
Page 8 
7.Repairs to sealed components:
1)During repairs to sealed components, all electrical supplies shall be disconnected from the equipment
The area shall be checked with an appropriate refrigerant detector prior to and during work, to ensure
the technician is aware of potentially flammable atmospheres. Ensure that the leak detection
equipment being used is suitable for use with flammable refrigerants, i.e. non-sparking, adequately
sealed or intrinsically safe.
5)Presence of fire extinguisher:
If any hot work is to be conducted on the refrigeration equipment or any associated parts, appropriate fire
extinguishing equipment shall be available to hand. Have a dry powder or CO2 fire extinguisher adjacent
to the charging area.
6)No ignition sources:
No person carrying out work in relation to a refrigeration system which involves exposing any pipe
work that contains or has contained flammable refrigerant shall use any sources of ignition in such a
manner that it may lead to the risk of fire or explosion. All possible ignition sources, including cigarette
smoking, should be kept sufficiently far away from the site of installation, repairing, removing and
disposal, during which flammable refrigerant can possibly be released to the surrounding space. Prior
to work taking place, the area around the equipment is to be surveyed to make sure that there are no
flammable hazards or ignition risks. No Smoking signs shall be displayed.
7)Ventilated area:
Ensure that the area is in the open or that it is adequately ventilated before breaking into the system or
conducting any hot work. A degree of ventilation shall continue during the period that the work is carried
out. The ventilation should safely disperse any released refrigerant and preferably expel it externally into
the atmosphere.
8)Checks to the refrigeration equipment:
Where electrical components are being changed, they shall be fit for the purpose and to the correct
specification. At all times the manufacturer's maintenance and service guidelines shall be followed. If in
doubt consult the manufacturer's technical department for assistance. The following checks shall be
applied to installations using flammable refrigerants:
The charge size is in accordance with the room size within which the refrigerant containing parts are
installed;
The ventilation machinery and outlets are operating adequately and are not obstructed;
If an indirect refrigerating circuit is being used, the secondary circuit shall be checked for the presence of
refrigerant; Marking on the equipment continues to be visible and legible. Markings and signs that are
illegible shall be corrected;
Refrigeration pipe or components are installed in a position where they are unlikely to be exposed
to any substance which may corrode refrigerant containing components, unless the components are
constructed of materials which are inherently resistant to being corroded or are suitably protected
against being so corroded.
9)Checks to electrical devices:
Repair and maintenance to electrical components shall include initial safety checks and component
inspection procedures. If a fault exists that could compromise safety, then no electrical supply shall be
connected to the circuit until it is satisfactorily dealt with. If the fault cannot be corrected immediately but
it is necessary to continue operation, an adequate temporary solution shall be used. This shall be reported
to the owner of the equipment so all parties are advised.
Initial safety checks shall include:
That capacitors are discharged: this shall be done in a safe manner to avoid possibility of sparking;
That there no live electrical components and wiring are exposed while charging, recovering or purging
the system; That there is continuity of earth bonding.

CEPH-121B
Installation and Operation Instruction Manual
9www.coastair-ac.com
9
Safety Precautions
Page 9 
8. Repair to intrinsically safe components:
Do not apply any permanent inductive or capacitance loads to the circuit without ensuring that this will
not exceed the permissible voltage and current permitted for the equipment in use. Intrinsically safe
components are the only types that can be worked on while live in the presence of a flammable
atmosphere. The test apparatus shall be at the correct rating. Replace components only with parts
specified by the manufacturer. Other parts may result in the ignition of refrigerant in the atmosphere
from a leak.
9. Cabling:
Check that cabling will not be subject to wear, corrosion, excessive pressure, vibration, sharp edges or
any other adverse environmental effects. The check shall also take into account the effects of aging or
continual vibration from sources such as compressors or fans.
10. Detection of flammable refrigerants:
Under no circumstances shall potential sources of ignition be used in the searching for or detection
of refrigerant leaks. A halide torch (or any other detector using a naked flame) shall not be used.
11. Leak detection methods:
The following leak detection methods are deemed acceptable for systems containing flammable
refrigerants. Electronic leak detectors shall be used to detect flammable refrigerants, but the sensitivity
may not be adequate, or may need re-calibration. (Detection equipment shall be calibrated in a
refrigerant-free area.) Ensure that the detector is not a potential source of ignition and is suitable for the
refrigerant used. Leak detection equipment shall be set at a percentage of the LFL of the refrigerant
and
shall be calibrated to the refrigerant employed and the appropriate percentage of gas (25 %maximum) is
confirmed. Leak detection fluids are suitable for use with most refrigerants but the use of detergents
containing chlorine shall be avoided as the chlorine may react with the refrigerant and corrode the
copper pipe-work. If a leak is suspected, all naked flames shall be removed/ extinguished. If a leakage of
refrigerant is found which requires brazing, all of the refrigerant shall be recovered from the system, or
isolated (by means of shut off valves) in a part of the system remote from the leak. Oxygen free nitrogen
(OFN) shall then be purged through the system both before and during the brazing process.
12. Removal and evacuation:
When breaking into the refrigerant circuit to make repairs or for any other purpose conventional
procedures shall be used. However, it is important that best practice is followed since flammability is a
consideration. The following procedure shall be adhered to:
Remove refrigerant; Purge the circuit with inert gas; Evacuate; Purge again with inert gas; Open the
circuit by cutting or brazing.
The refrigerant charge shall be recovered into the correct recovery cylinders. The system shall be flushed
with OFN to render the unit safe. This process may need to be repeated several times. Compressed air or
being worked upon prior to any removal of sealed covers, etc. If it is absolutely necessary to have an
electrical supply to equipment during servicing, then a permanently operating form of leak detection
shall be located at the most critical point to warn of a potentially hazardous situation.
2)Particular attention shall be paid to the following to ensure that by working on electrical components,
the casing is not altered in such a way that the level of protection is affected. This shall include damage
to cables, excessive number of connections, terminals not made to original specification, damage to
seals, incorrect fitting of glands, etc. Ensure that apparatus is mounted securely. Ensure that seals or
sealing materials have not degraded such that they no longer serve the purpose of preventing the
ingress of flammable atmospheres. Replacement parts shall be in accordance with the manufacturer's
specifications.
NOTE: The use of silicon sealant may inhibit the effectiveness of some types of leak detection
equipment. Intrinsically safe components do not have to be isolated prior to working on them.

CEPH-121B
Installation and Operation Instruction Manual
10
www.coastair-ac.com
10
Safety Precautions
Page 10 
15.Labeling:
Equipment shall be labeled stating that it has been de-commissioned and emptied of refrigerant. The
label shall be dated and signed. Ensure that there are labels on the equipment stating the equipment
contains flammable refrigerant.
16.Recovery:
When removing refrigerant from a system, either for servicing or decommissioning, it is recommended
good practice that all refrigerants are removed safely. When transferring refrigerant into cylinders,
ensure that only appropriate refrigerant recovery cylinders are employed. Ensure that the correct
number of cylinders for holding the total system charge is available. All cylinders to be used are
designated for the recovered refrigerant and labeled for that refrigerant (i.e. special cylinders for the
recovery of refrigerant). Cylinders shall be complete with pressure relief valve and associated shut-off
valves in good working order. Empty recovery cylinders are evacuated and, if possible, cooled before
13.Charging procedures:
In addition to conventional charging procedures, the following requirements shall be followed. Ensure
that contamination of different refrigerants does not occur when using charging equipment. Hoses or
lines shall be as short as possible to minimize the amount of refrigerant contained in them.
Cylinders shall be kept upright.
Ensure that the refrigeration system is earthed prior to charging the system with refrigerant.
Label the system when charging is complete (if not already).
Extreme care shall be taken not to overfill the refrigeration system. Prior to recharging the system it
shall be pressure tested with OFN. The system shall be leak tested on completion of charging but prior
to commissioning. A follow up leak test shall be carried out prior to leaving the site.
14.Decommissioning:
Before carrying out this procedure, it is essential that the technician is completely familiar with the
equipment and all its detail. It is recommended good practice that all refrigerants are recovered safely.
Prior to the task being carried out, an oil and refrigerant sample shall be taken in case analysis is
required prior to re-use of reclaimed refrigerant. It is essential that electrical power is available before
the task is commenced.
15.Become familiar with the equipment and its operation. b) Isolate system electrically. c) Before
attempting the procedure ensure that: Mechanical handling equipment is available, if required, for
handling refrigerant cylinders;All personal protective equipment is available and being used correctly;
The recovery process is supervised at all times by a competent person; Recovery equipment and
cylinders conform to the appropriate standards. d) Pump down refrigerant system, if possible. e) If a
vacuum is not possible, make a manifold so that refrigerant can be removed from various parts of the
system. f) Make sure that cylinder is situated on the scales before recovery takes place. g) Start the
recovery machine and operate in accordance with manufacturer's instructions. h) Do not overfill
cylinders. (No more than 80 % volume liquid charge). i) Do not exceed the maximum working
pressure of the cylinder, even temporarily. j) When the cylinders have been filled correctly and the
process completed, make sure that the cylinders and the equipment are removed from site promptly
and all isolation valves on the equipment are closed off. k) Recovered refrigerant shall not be charged
into another refrigeration system unless it has been cleaned and checked.
oxygen shall not be used for this task. Flushing shall be achieved by breaking the vacuum in the system
with OFN and continuing to fill until the working pressure is achieved, then venting to atmosphere, and
finally pulling down to a vacuum. This process shall be repeated until no refrigerant is within the system.
When the final OFN charge is used, the system shall be vented down to atmospheric pressure to enable
work to take place. This operation is absolutely vital if brazing operations on the pipe-work are to take
place. Ensure that the outlet for the vacuum pump is not close to any ignition sources and there is
ventilation available.

CEPH-121B
Installation and Operation Instruction Manual
11 www.coastair-ac.com
11
Page 11 
Installation
Instructions
recovery occurs. The recovery equipment shall be in good working order with a set of instructions
concerning the equipment that is at hand and shall be suitable for the recovery of flammable refrigerants.
In addition, a set of calibrated weighing scales shall be available and in good working order. Hoses shall
be complete with leak-free disconnect couplings and in good condition. Before using the recovery
machine, check that it is in satisfactory working order, has been properly maintained and that any
associated electrical components are sealed to prevent ignition in the event of a refrigerant release.
Consult manufacturer if in doubt. The recovered refrigerant shall be returned to the refrigerant supplier
in the correct recovery cylinder, and the relevant Waste Transfer Note arranged. Do not mix refrigerants
in recovery units and especially not in cylinders. If compressors or compressor oils are to be removed,
ensure that they have been evacuated to an acceptable level to make certain that flammable refrigerant
does not remain within the lubricant. The evacuation process shall be carried out prior to returning the
compressor to the suppliers. Only electric heating to the compressor body shall be employed to
accelerate this process. When oil is drained from a system, it shall be carried out safely.
Installation Instructions
Preparation
NOTE:
All the illustrations in the manual are for explanation purpose only. Your machine may be slightly different.
The actual shape shall prevail. The unit can be controlled by the unit control panel alone or with the remote
controller. This manual does not include Remote Controller Operations, see the <<Remote Controller
Instruction>> packed with the unit for details.
Design Notice
In order to ensure the optimal performance of our products, the design specifications of the unit and
remote control are subject to change without prior notice.
front
control panel
handle
(both sides)
horizontal louver blade
(swing automatically)
Caster
Panel
MODEL A
air outlet
lower air filter
lower air intake
drain outlet
power cord buckle
bottom tray
drain outlet
power cord outlet
MODEL C
rear
upper air filter
upper air intake

CEPH-121B
Installation and Operation Instruction Manual
12
www.coastair-ac.com
12
Page 12 
Installation
Instructions
MODE Temperature Range MODE Temperature Range
Ambient Temperature Range For Unit Operating
Cool 62-95°F
Dry
Heat(pump heat mode)
Heat(electrical heat mode) 55-95°F
41-86°F
Exhaust Hose Installation
The exhaust hose and adapter must be installed or removed in accordance with the usage mode.
For COOL,HEAT(heat pump type) or AUTO mode exhaust hose
must be installed. For FAN, DRY or
HEAT (electrical heat type) mode
exhaust hose must be removed.
86°F
Choosing The Right Location
Recommend Installation
Your installation location should meet the following requirements:
-Make sure that you install your unit on an even surface to minimize noise and
vibration.
-The unit must be installed near a grounded plug, and the Collection Tray Drain
(found on the back of the unit) must be accessible.
-The unit should be located at least 12” from the nearest wall to ensure proper
air conditioning. The horizontal louver blade should be at least 19.7” away from
obstacles.
-DO NOT cover the Intakes, Outlets or Remote Signal Receptor of the unit, as this
could cause damage to the unit.
50cm
19.7 inch
30cm
30cm
12inch
12inch
50cm
19.7inch
Energy Rating Information
The energy rating and noise information for this unit is based on the standard installation using an un-extended
exhaust duct (Diameter: 6 in., Length: 60 in.) without window slider adapter or wall exhaust adapter A.
The unit with 10 feet extended exhaust duct is running by using 2 exhaust ducts (Diameter: 6 in., Length: 60 in.
+ Diameter: 6 in., Length: 60 in.). The Energy rating and noise information for unit with 10 feet extended
exhaust duct is not assessed. (For some models)
NOTE：
We recommend that operating the unit at room temperature below 95
°F . Since there is a risk that the unit with 10
feet extended exhaust duct would not work at room temperature above 95
°F under some extreme conditions,
such as the lower air intake be blocked for 50%.
How to Stay Cool with a New Portable Air Conditioner(For the models comply with the
requirements of Department Of Energy in US)
Because of a new federal test procedure for Portable Air Conditioners, you may notice that the
cooling capacity claims on portable air conditioner packaging are significantly lower than that of
models produced prior to 2017. This is due to changes in the test procedure, not to the portable
air conditioners themselves.

CEPH-121B
Installation and Operation Instruction Manual
13 www.coastair-ac.com
13
Page 13 
Tools Needed
-Medium Philips screwdriver; -Tape measure or ruler; -Knife or scissors;
-Saw (On some models, to shorten window adaptor for narrow windows)
Installation
Instructions
Accessories
North America
Name ofAccessories Qty.
MODEL A MODEL B
Shape Name ofAccessories Qty. Shape
1 pcWindow Slider A(*)
Bolt
1 pc
1 set
Unit Adaptor
Security Bracket and 2 Screws
1 pc
1 pc
Exhaust Hose
Drain Hose
1 pc
1 pc
2 pc
2 pc
2 pc
1 pc
Window Slider Adaptor(*)
Power Cord Buckle
ON /OF F
TEMP
SHORT CUT
TIM E R
ON TIM E R
O FF
MODE
FAN
SLEEP SW IN G LED
1 set(*)
1 pc(*)Window Slider B Remote Controller and Battery
(only for remote control models)
2 pc/4 pc(*)
1 pc/2 pc(*)
Foam Seal A (Adhesive)
2 pcFoam Seal B (Adhesive)
1 pc/2 pc/3 pc(*)
Foam Seal C (Non-adhesive)
1 pc(*)
Drain Hose Adaptor
(only for heat pump mode)
NOTE: Items with (*) are on some models. Slight variations in design may occur.
What should I look for first when purchasing a portable air conditioner?
The right air conditioner helps you cool a room efficiently. An undersized unit won't cool adequately
while one that's too large will not remove enough humidity, leaving the air feeling damp. To find
the proper air conditioner, determine the square footage of the room you want to cool by
multiplying the room length by its width. You also need to know the air conditioner's BTU (British
Thermal Unit) rating, which indicates the amount of heat it can remove from a room. A higher
Why is the cooling capacity lower on newer models than on older units?
number means more cooling power for a larger room. (Be sure you are comparing only newer
models to each other- older models may appear to have a higher capacity, but are actually the
same). Be sure to “size up” if your portable air conditioner will be placed in a very sunny room, in a
kitchen, or in a room with high ceilings. After you’ve found the right cooling capacity or your
room, you can look at other features.
Federal regulations require manufacturers to calculate cooling capacity based on a specific test
procedure, which was changed just this year. Models manufactured before 2017 were tested under
a different procedure and cooling capacity is measured differently than in prior years’models. So,
while the BTUs may be lower, the actual cooling capacity of the air conditioners has not changed.
What is SACC ?
SACC is the representative value of Seasonally Adjusted Cooling Capacity, in Btu/h, as determined
in accordance with the DOE test procedure at title 10 Code of Federal Regulations (CFR) 430,
subpart B, appendix CC and applicable sampling plans.

CEPH-121B
Installation and Operation Instruction Manual
14
www.coastair-ac.com
14
Page 14 
Installation
Instructions
Window Installation Kit
Unit adaptor
Exhaust hose
Window slider
adaptor
Type window installation:
Press the exhaust hose(or extended exhaust hose)
into the window slider adaptor(or wall exhaust
adaptor) and unit adaptor, clamp automatically by
elastic buckles of the adaptors.
Step One: Preparing the Exhaust Hose assembly
Other Regions
Name ofAccessories Qty.
Shape Name ofAccessories Qty. Shape
1 pc(*)Window Slider A Bolt
1 pc 1 set(*)Unit Adaptor Security Bracket and 2 Screws
1 pc 1 pcExhaust Hose Drain Hose
1 pc(*) 1 pcWindow Slider Adaptor Power Cord Buckle
ON /OF F
TEMP
SHORT CUT
TIM E R
ON TIM E R
O FF
MODE
FAN
SLEEP SW IN G LED
1 set(*)1 pc(*)Window Slider B Remote Controller and Battery
(only for remote control models)
2 pc(*)Foam Seal A (Adhesive)
2 pc(*)Foam Seal B (Adhesive)
4 set(*)
Screw and anchor
(only for wall installation models)
1 pc(*)Foam Seal C (Non-adhesive)
1 pc(*)
Drain Hose Adaptor
(only for heat pump mode)
1 pc(*)
Model A

CEPH-121B
Installation and Operation Instruction Manual
15 www.coastair-ac.com
15
Page 15 
Installation
Instructions
Hook Hole Seat
Lower groove
adaptor Make sure the adaptor
is inserted into the lower
groove of the air outlet.
Step Two: Install the Exhaust hose assembly to
the unit
Insert unit adaptor of the Exhaust hose assembly
into the lower groove of the air outlet of the unit
while the hook of the adaptor is aligned with the
hole seat of the air outlet and slide down the
Exhaust hose assembly along the arrow direction
for installation.
Step Three: Preparing the Adjustable Window
Slider
Window slider A
MODEL A
Window slider B
Bolt
1.
2.
Choose the window sliders according to the size
of your window. Sometimes, it needs to be cut
short to meet the window size, please take extra
care to cut it properly.
Use bolts to fasten the window sliders once they
are adjusted to the Proper length.

CEPH-121B
Installation and Operation Instruction Manual
16
www.coastair-ac.com
16
Page 16 
Installation
Instructions
Or
Or
Window slider A
Window slider B
(if required)
Foam seal C
(Non-adhesive type)
Installation
NOTE: Once the Exhaust Hose assembly and Adjustable Window Slider are prepared, choose from one of
the following two installation methods.
Type 1: Hung Window or Sliding Window Installation(For some models)
1. Cut the adhesive foam seal A and B strips to the proper lengths, and attach them to the window sash
and frame as shown.
2. Insert the window slider assembly into the window opening.
Or
Foam seal B
(Adhesive type-shorter)
Foam seal A
(Adhesive type)
Foam seal B
(Adhesive type-shorter)
Foam seal A
(Adhesive type)
Window slider A
Window slider B
(if required)
Foam seal C
(Non-adhesive type)
Or
2 Screws
Security Bracket
3. Cut the non-adhesive foam seal C strip to match the width(or height) of the window. Insert the seal
between the glass and the window frame to prevent air and insects from getting into the room.
4. If desired, install the security bracket with 2 screws as shown.
2 Screws
Security
Bracket

CEPH-121B
Installation and Operation Instruction Manual
17 www.coastair-ac.com
17
Page 17 
Installation
Instructions
Or
5. Insert the window slider adaptor into the hole of the window slider.
NOTE: To ensure proper function, DO NOT overextend
around the air outlet of the exhaust hose (in the range
or bend the hose. Make sure that there is no obstacle
of 20 in.) in order to the exhaust system works
properly. All the illustrations in this manual are for explanation purpose only. Your air conditioner may be
slightly different. The actual shape shall prevail.

CEPH-121B
Installation and Operation Instruction Manual
18
www.coastair-ac.com
18
Page 18 
Operating Instructions
Control Panel Features
NOTE: The following control panels are for explanation purpose only. The control panel of the unit you
purchased may be slightly different according to the models. Your machine may not contain some indicators or
buttons. The actual shape shall prevail.
Indicator Function Indicator Function
HIGH fan speed light
AUTO fan speed light(all illuminate/all dark)
MED fan speed light
LOW fan speed light
ION light
SLEEP light
Degrees Celsius
LED display
COOL mode light
FAN mode light
DRY mode light
AUTO mode light
Degrees Fahrenheit
Timer on light;
Timer off light;
Heat mode light;
Power management light
Power light
Operating
Instructions
NOTE: On some models is instead of °F. On some models (power light) is instead of (WIRELESS light).
FOLLOW ME light Wireless light
within 8 minutes, the unit will exit Wireless
connection mode automatically and the
Wireless indicator illuminates. If connection has
failed within 8 minutes, the unit exits Wireless
connection mode automatically. After Wireless
connection is successful, you can press and
hold SWING and DOWN (-) buttons at the same
time for 3 seconds to turn off Wireless function
and the LED DISPLAY shows 'OF' for 3 seconds,
press SWING and UP(+) buttons at the same
Swing/Wireless (On some models) button
Used to initiate the Auto swing feature. When the
operation is ON, pressing the SWING button can
stop the louver at the desired angle.
Used to initiate the Wireless function. For the first
time using the Wireless function, press and hold
the swing button for 3 seconds to initiate the
Wireless connection mode. The LED DISPLAY
shows 'AP' to indicate you can set Wireless
connection. If connection(router) is successful
CONSTANTFAN(Press 3s)
CONSTANTFAN(Press 3s) CONSTANTFAN(Press 3s)
CONSTANTFAN(Press 3s)
Constant Fan light

CEPH-121B
Installation and Operation Instruction Manual
19 www.coastair-ac.com
19
Page 19 
Operation Instructions
Operating
Instructions
time to turn on Wireless function and the LED
DISPLAY shows 'ON' for 3 seconds.
NOTE: When you restart the Wireless function,
it may take a period of time to connect to the
network automatically.
Timer button
Used to initiate the AUTO ON start time and
AUTO OFF stop time program, in conjuction
with the + & - buttons. The timer on/off
indicator light illuminates under the timer on/
off settings.
Mode button
Selects the appropriate operating mode. Each
time you press the button, a mode is selected
in a sequence that goes from AUTO), COOL,
DRY, FAN and HEAT (cooling only models
without). The mode indicator light illuminates
under the different mode settings.
Up (+) and Down (-) buttons
Used to adjust (increasing/decreasing)
temperature settings in 1°F (or 2 °F) increments
in a range of 62°F to 86°F (or 88°F) or the TIMER
setting in a range of 0~ 24hrs.
NOTE: The control is capable of displaying
temperature in degrees Fahrenheit or degrees
Celsius. To convert from one to the other, press
and hold the Up and Down buttons at the same
time for 3 seconds.
Fan/Constant fan(On some models) button
Control the fan speed. Press to select the fan
speed in four steps-LOW, MED, HIGH and AUTO.
The fan speed indicator light illuminates under
different fan settings. When select AUTO fan
speed, all the fan indicator lights turn dark. On
some models, when you select AUTO fan
speed, all the fan indicator lights illuminate.
NOTE: In cooling or Dry mode, press the button
for 3 seconds to turn on or off the constant fan
function. When the function is turned on, the
constant fan light will illuminate, identifying
the fan continuous run for cooling. When the
function is turned off, the constant fan light
will go out, identifying the fan cycle run with
compressor stop.
Sleep(Eco) button
Used to initiate the SLEEP/ECO operation.
Power button
Power switch on/off.
LED display
Shows the set temperature in °C or °F("°F" no
display for some models) and the Auto-timer
settings. While on DRY and FAN modes, it
shows the room temperature.
Shows Error codes and protection code:
E1-Room temperature sensor error.
E2-Evaporator temperature sensor error.
E3-Condenser temperature sensor error
(On some models).
E4-Display panel communication error.
EC-Refrigerant leakage detection malfunction
(On some models).
P1-Bottom tray is full--Connect the drain hose
and drain the collected water away.If protection
repeats,call for service.
Note: When one of the above malfunctions
occurs, turn off the unit, and check for any
obstructions. Restart the unit, if the malfunction
is still present, turn off the unit and unplug the
power cord. Contact the manufacturer or its
service agents or a similar qualified person for
service.
COOL operation
· Press the "MODE" button until the "COOL" indicator
light comes on.
· Press the ADJUST buttons "+" or "-" to select your
desired room temperature. The temperature can be
set within a range of 62°F~86°F(or 88°F).
· Press the "FAN SPEED" button to choose the fan
speed.
HEAT operation(cooling only models without)
· Press the "MODE" button until the "HEAT" indicator
light comes on.
· Press the ADJUST buttons "+" or " - " to select your
desired room temperature. The temperature can be
set within a range of 62°F~86°F(or 88°F).
· Press the "FAN SPEED" button to choose the fan
speed.
CONSTANT FAN(Press 3s)

CEPH-121B
Installation and Operation Instruction Manual
20
www.coastair-ac.com
20
Page 20 
Operating
Instructions
Other features
Note: For some models, the fan speed can not be
adjusted under HEAT mode.
AUTO operation
· When you set the air conditioner in AUTO mode, it
will automatically select cooling, heating(cooling only
models without), or fan only operation depending on
what temperature you have selected and the room
temperature.
· The air conditioner will control room temperature
automatically around the temperature point set by you.
· Under AUTO mode, you can not select the fan speed.
NOTE: Under AUTO mode, both the AUTO mode and
the actual operation mode indicator lights illuminate
for some models.
FAN operation
· Press the "MODE" button until the"FAN " indicator
light comes on.
· Press the "FAN SPEED" button to choose the fan
speed. The temperature can not be adjusted.
· Do not put the duct to window.
DRY operation
· Press the "MODE" button until the "DRY" indicator
light comes on.
· Under this mode, you cannot select a fan speed or
adjust the temperature. The fan motor operates at
LOW speed.
· Keep windows and doors closed for the best
dehumidifying effect.
· Do not put the duct to window.
TIMER operation
· When the unit is on, pressing the Timer button will
initiate the Auto-off stop program, the TIMER OFF
indicator light illuminates. Press the UP or DOWN
button to select the desired time. Press the TIMER
button again within 5 seconds, the Auto-on start
program is initiated. And the TIMER ON indicator
light illuminates. Press the up or down button to
select the desired Auto-on start time.
· When the unit is off, press the Timer button to initiate
the Auto-on start program, press it again within 5
seconds will initiate the Auto-off stop program.
· Press or hold the UP or DOWN button to change the
Auto time by 0.5 hour increments, up to 10 hours,
then at 1 hour increments up to 24 hours. The
control will count down the time remaining until
start.
· The system will automatically revert back to display
the previous temperature setting if there is no
operation in a 5 seconds period.
· Turning the unit ON or OFF at any time or adjusting
the timer setting to 0.0 will cancel the Auto Start/
Stop timer program.
SLEEP(ECO) operation
· Press this button, the selected temperature will
increase(cooling) or decrease(heating) by 2°F(or 1°F)
30 minutes. The temperature will then increase
(cooling) or decrease (heating) by another 2°F(or 1°F)
after an additional 30 minutes. This new temperature
will be maintained for 7 hours before it returns to the
originally selected temperature. This ends the Sleep/
Eco mode and the unit will continue to operate as
originally programmed.
NOTE: This feature is unavailabe under FAN or DRY
mode.
FOLLOW ME/TEMP SENSING feature(On some models)
NOTE:This feature can be activated from the remote
control ONLY. The remote control serves as a remote
thermostat allowing for the precise temperature
control at its location.
To activate the Follow Me/Temp Sensing feature, point
the remote control towards the unit and press the
Follow Me/Temp Sensing button. The remote control
will send this signal to the air conditioner until press
the Follow Me/Temp Sensing button again. If the unit
does not receive the Follow Me/Temp Sensing signal
during any 7 minutes interval, the unit will exit the
Follow Me/Temp Sensing mode.
NOTE: This feature is unavailable under FAN or DRY
mode.
AUTO-RESTART
If the unit breaks off unexpectedly due to the power
being cut, it will restart with the previous function
setting automatically when the power resumes.