Panasonic WH-MXC09J3E8 User manual

© Panasonic Corporation 2021.
Order No: PAPAMY2110029CE
Air-to-Water Heatpump
Mono Bloc Unit
WH-MXC09J3E8
WH-MXC12J9E8
Destination
Europe
Turkey
WARNING
This service information is designed for experienced repair technicians only and is not designed for use by the general public.
It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product.
Products powered by electricity should be serviced or repaired only by experienced professional technicians. Any attempt to service
or repair the products dealt with in this service information by anyone else could result in serious injury or death.
CAUTION
R32 REFRIGERANT – This Air Conditioner contains and operates with refrigerant R32.
THIS PRODUCT MUST ONLY BE INSTALLED OR SERVICED BY QUALIFIED PERSONNEL.
Refer to National, State, Territory and local legislation, regulations, codes, installation & operation manuals, before the installation,
maintenance and/or service of this product.
In order to avoid frostbite, be assured of no refrigerant leakage during the installation or repairing of refrigerant circuit.
PRECAUTION OF LOW TEMPERATURE

2
TABLE OF CONTENTS
PAGE PAGE
1.Safety Precautions ............................................. 4
2.Precaution for Using R32 Refrigerant .............. 6
3.Specifications ................................................... 11
3.1WH-MXC09J3E8 .......................................... 11
3.2WH-MXC12J9E8 .......................................... 14
4.Features ............................................................. 17
5.Location of Controls and Components .......... 18
5.1Indoor Unit ................................................... 18
6.Dimensions ....................................................... 37
6.1Mono Bloc Unit ............................................. 37
7.Refrigeration and Water Cycle Diagram ........ 38
7.1Standard System (Optional PCB not
connected) ................................................... 39
7.2Advance System (Optional PCB connected) ...
.................................................................... 39
8.Block Diagram .................................................. 40
8.1WH-MXC09J3E8 .......................................... 40
8.2WH-MXC12J9E8 .......................................... 41
9.Wiring Connection Diagram ............................ 42
9.1Water System .............................................. 42
9.2Refrigerant System ...................................... 44
10.Electronic Circuit Diagram .............................. 45
10.1Water System .............................................. 45
10.2Refrigerant System ...................................... 47
11.Printed Circuit Board ....................................... 48
11.1Water System .............................................. 48
11.2Refrigerant System ...................................... 50
12.Installation Instruction ..................................... 52
12.1Mono Bloc Unit ............................................. 52
12.2Variation of System ...................................... 65
12.3How to Fix External Device .......................... 72
12.4System Installation ....................................... 75
12.5Service and Maintenance ............................ 87
13.Operation and Control ..................................... 88
13.1Basic Function ............................................. 88
13.2Water Pump ...............................................100
13.3Indoor Unit Safety ......................................104
13.4Auto Restart Control ..................................104
13.5Indication Panel .........................................104
13.6Indoor Back-Up Heater Control .................105
13.7Tank Heater Control ...................................106
13.8Base Pan Heater Control (Optional) ..........108
13.9Heater Turn ON/OFF priority Control .........109
13.10Force Heater Mode ....................................109
13.11Powerful Operation ....................................111
13.12Quiet Operation ..........................................111
13.13Sterilization Mode ......................................112
13.14Outdoor Ambient Thermo OFF Control .....112
13.15Alternative Outdoor Ambient Sensor Control ..
................................................................. 113
13.16Force DHW mode ..................................... 113
13.17SMART DHW mode .................................. 114
13.18DHW Capacity Setting .............................. 114
13.19Anti Freeze Control ................................... 115
13.20Solar Operation (Optional) ........................ 116
13.21Boiler Bivalent Control .............................. 117
13.22External Room Thermostat Control (Optional)
................................................................. 119
13.23Three Ways Valve Control ........................ 120
13.24Two Ways Valve Control........................... 121
13.25External OFF/ON Control ......................... 121
13.26External Compressor Switch (Optional PCB) ..
................................................................. 122
13.27Heat/Cool Switch (Optional PCB) ............. 123
13.28SG Ready Control (Optional PCB) ........... 124
13.29Demand Control (Optional PCB) .............. 126
13.30Holiday Mode ............................................ 126
13.31Dry Concrete ............................................. 127
13.32Flow Sensor .............................................. 127
14.Protection Control ......................................... 128
14.1Protection Control for All Operations ........ 128
14.2Protection Control for Heating Operation.........
................................................................. 130
14.3Protection Control for Cooling Operation .........
................................................................. 132
15.Servicing Mode .............................................. 133
15.1Expansion Vessel ⑦ Pre Pressure Checking .
................................................................. 133
15.2Maintenance ............................................. 133
15.3Pump Down Procedures ........................... 134
15.4How To Adjust Pump Speed ..................... 135
15.5How To Unlock Cool Mode ....................... 136
15.6EEPROM Factory Default Data Setup
Procedure ................................................. 137
15.7Dry Concrete Setup .................................. 138
16.Maintenance Guide........................................ 140
16.1Maintenance Menu ................................... 142
17.Troubleshooting Guide ................................. 144
17.1Refrigeration Cycle System ...................... 144
17.2Relationship between the Condition of the Air-
to-Water Heatpump Indoor and Outdoor Units
and Pressure and Electric Current ............ 145
17.3Breakdown Self Diagnosis Function ......... 146
17.4Error Codes Table ..................................... 148
17.5Self-diagnosis Method .............................. 150
18.Disassembly and Assembly Instructions ... 196
18.1To Remove The Cabinet Front Plate ........ 196
18.2To Remove The Cabinet Top Plate .......... 196
18.3To Remove The Cabinet Rear Plate ......... 197
18.4To Remove Pressure Gauge .................... 197
18.5To Remove Water System Electronic
Controller Board ........................................ 198
18.6To Remove Air Purge Valve ..................... 199

3
18.7To Remove Flow Sensor ........................... 199
18.8To Remove Water Pump ........................... 200
18.9To Remove Heater .................................... 201
18.10To Remove Filter ....................................... 202
19.Technical Data ................................................ 203
19.1Operation Characteristics .......................... 203
19.2Heating Capacity Table ............................. 211
19.3Cooling Capacity Table ............................. 213
20.Exploded View and Replacement Parts List .....
......................................................................... 214
20.1Water System ............................................ 214
20.2Refrigerant System .................................... 215
 Specifications, designs and contents in this Service Manual are subject to change without notice.

4
1. Safety Precautions
 Read the following “SAFETY PRECAUTIONS” carefully before installation of (Mono bloc) Air-to-Water Heatpump
system (hereafter referred to as “Mono bloc unit”).
 Electrical works and water installation works must be done by licensed electrician and licensed water system
installer respectively. Be sure to use the correct rating and main circuit for the model to be installed.
 The caution items stated here must be followed because these important contents are related to safety. The
meaning of each indication used is as below.
Incorrect installation due to ignorance or negligence of the instructions will cause harm or damage, and the
seriousness is classified by the following indications.
WARNING This indication shows the possibility of causing death or serious injury.
CAUTION This indication shows the possibility of causing injury or damage to properties only.
The items to be followed are classified by the symbols:
Symbol with white background denotes item that is PROHIBITED.
Symbol with dark background denotes item that must be carried out.
 Carry out test run to confirm that no abnormality occurs after the installation. Then, explain to user the operation,
care and maintenance as stated in instructions. Please remind the customer to keep the operating instructions for
future reference.
 If there is any doubt about the installation procedure or operation, always contact the authorized dealer for advice
and information.
 This appliance is not intended for accessibility by the general public.
 Please leave this installation manual to the user after installation.
WARNING
1. Do not use means to accelerate the defrosting process or to clean, other than those recommended by the manufacturer. Any unfit
method or using incompatible material may cause product damage, burst and serious injury.
2. Do not install Mono bloc unit near handrail of veranda. When installing Mono bloc unit at veranda of high rise building, child may climb
up to Mono bloc unit and cross over the handrail and causing accident.
3. Do not use unspecified cord, modified cord, join cord or extension cord for power supply cord. Do not share the single outlet with other
electrical appliances. Poor contact, poo
r
insulation or over current will cause electrical shock or fire.
4. Do not tie up the power supply cord into a bundle by band. Abnormal temperature rise on power supply cord may happen.
5. Do not insert your fingers or other objects into the unit, high speed rotating fan may cause injury.
6. Do not sit or step on the unit, you may fall down accidentally.
7. Keep plastic bag (packaging material) away from small children, it may cling to nose and mouth and prevent breathing.
8. Do not purchase unauthorized electrical parts for installation, service, maintenance and etc.. They might cause electrical shock or fire.
9. Do not pierce or burn as the appliance is pressurized. Do not expose the appliance to heat, flame, sparks, or other sources of ignition.
Else, it may explode and cause injury or death.
10. Do not modify the wiring of Mono bloc unit for installation of other components (i.e. heater, etc). Overloaded wiring or wire connection
points may cause electrical shock or fire.
11. Do not add or replace refrigerant other than specified type. It may cause product damage, burst and injury etc.
12. This Mono bloc unit is a multi supply appliance. All circuits must be disconnected before accessing the unit terminals.
13. For electrical work, follow the national regulation, legislation and this installation instructions. An independent circuit and single outlet
must be used. If electrical circuit capacity is not enough or defect found in the electrical work, it will cause electrical shock or fire.
14. For water circuit installation work, follow to relevant European and national regulations (including EN61770) and local plumbing and
building regulation codes.
15. Engage authorized dealer or specialist for installation. If installation done by the user is incorrect, it will cause water leakage, electrical
shock or fire.
16. Install according to this installation instructions strictly. If installation is defective, it will cause water leakage, electrical shock or fire.

5
WARNING
17. Only use the supplied or specified installation parts. Else, it may causes Mono bloc unit vibrate, fall, water leakage, electrical shock or
fire.
18. Install at a flat, strong and firm location which is able to withstand the Mono bloc unit’s weight. If the location is slanting, or strength is
not enough the set will fall and cause injury.
19. Wire routing must be properly arranged so that control board cover is fixed properly. If control board cover is not fixed perfectly, it will
cause fire or electrical shock.
20. This equipment is strongly recommended to be installed with Residual Current Device (RCD) on-site according to the respective
national wiring rules or country-specific safety measures in terms of residual current.
21. The unit is only for use in a closed water system. Utilization in an open water system may lead to excessive corrosion of the water
piping and risk of incubating bacteria colonies, particularly Legionella, in water.
22. If there is any doubt about the installation procedure or operation, always contact the authorized dealer for advice and information.
23. Select a location where in case of water leakage, the leakage will not cause damage to other properties.
24. When installing electrical equipment at wooden building of metal lath or wire lath, in accordance with electrical facility standard, no
electrical contact between equipment and building is allowed. Insulator must be installed in between.
25. This installation may be subjected to building regulation approval applicable to respective country that may require to notify the local
authority before installation.
26. Any work carried out on the Mono bloc unit after removing any panel which is secured by screws, must be carried out under the
supervision of authorized dealer and licensed installation contractor.
27. Be aware that refrigerants may not contain an odour.
28. This equipment must be properly earthed. Earth line must not be connected to gas pipe, water pipe, earth of lightning rod and
telephone. Otherwise, it may cause electrical shock in case of equipment breakdown or insulation breakdown.
CAUTION
1. Do not install the Mono bloc unit at place where leakage of flammable gas may occur. In case gas leaks and accumulates at
surrounding of the Mono bloc unit, it may cause fire.
2. Do not release refrigerant during piping work for installation, re-installation and during repairing a refrigeration parts. Take care of the
liquid refrigerant, it may cause frostbite.
3. Make sure the insulation of power supply cord does not contact hot part (i.e. refrigerant piping, water piping) to prevent from insulation
failure (melt).
4. Do not touch the sharp aluminium fin, sharp parts may cause injury.
5. Do not apply excessive force to water pipes that may damage the pipes. If water leakage occurs, it will cause flooding and damage to
other properties.
6. Carry out drainage piping as mentioned in installation instructions. If drainage is not perfect, water leakage may happen and may
cause damage to properties of the user.
7. The piping installation work must be flushed before the Mono bloc unit is connected to remove contaminants. Contaminants may
damage the Mono bloc unit components.
8. Select an installation location which is easy for maintenance. Incorrect installation, service or repair of this Mono bloc unit may
increase the risk of rupture and this may result in loss damage or injury and/or property.
9. Ensure the correct polarity is maintained throughout all wiring. Otherwise, it will cause electrical shock or fire.
10.
Power supply connection to Mono bloc unit.
 Power supply point should be in easily accessible place for power disconnection in case of emergency.
 Must follow local national wiring standard, regulation and this installation instruction.
 Strongly recommended to make permanent connection to a circuit breaker. It must be a double pole switch with a minimum
3.0 mm gap.
- Power Supply 1: Use approved 20A 4-poles circuit breaker with a minimum contact gap of 3.0mm.
- Power Supply 2: Use approved 15/16A 2-poles circuit breaker with a minimum contact gap of 3.0mm. (Only applicable for
WH-MXC09J3E8) or
Use approved 20A 4-poles circuit breaker with a minimum contact gap of 3.0mm. (Only applicable for WH-MXC12J9E8,
WH-MXC16J9E8)
11. Ensure the correct polarity is maintained throughout all wiring. Otherwise, it will cause electrical shock or fire.
12. After installation, the installer is obliged to verify correct operation of the Mono bloc unit. Check the connection point for water leakage
during test run. If leakage occurs, it will cause damage to other properties.
13. Keep any required ventilation openings clear of obstruction.
14.
Installation work.
Four or more people are required to carry out the installation work. The weight of Mono bloc unit might cause injury if carried by less
than four people.

6
2. Precaution for Using R32 Refrigerant
 The basic installation work procedures are the same as conventional refrigerant (R410A, R22) models.
However, pay careful attention to the following points:
WARNING
1.
Since the working pressure is higher than that of refrigerant R22 models, some of the piping and installation and service tools are
special.
Especially, when replacing a refrigerant R22 model with a new refrigerant R32 model, always replace the conventional piping with the
R32 and R410A piping on the outdoor unit side.
For R32 and R410A, the same pipe can be used.
2.
The mixing of different refrigerants within a system is prohibited. Models that use refrigerant R32 and R410A have a different charging
port thread diameter to prevent erroneous charging with refrigerant R22 and for safety.
Therefore, check beforehand. [The charging port thread diameter for R32 and R410A is 12.7 mm (1/2 inch).]
3. Ensure that foreign matter (oil, water, etc.) does not enter the piping.
4.
Operation, maintenance, repairing and refrigerant recovery should be carried out by trained and certified personnel in the use of
flammable refrigerants and as recommended by the manufacturer. Any personnel conducting an operation, servicing or maintenance
on a system or associated parts of the equipment should be trained and certified.
5. Any part of refrigerating circuit (evaporators, air coolers, AHU, condensers or liquid receivers) or piping should not be located in the
proximity of heat sources, open flames, operating gas appliance or an operating electric heater.
6. The user/owner or their authorized representative shall regularly check the alarms, mechanical ventilation and detectors, at least once
a year, where as required by national regulations, to ensure their correct functioning.
7. A logbook shall be maintained. The results of these checks shall be recorded in the logbook.
8. In case of ventilations in occupied spaces shall be checked to confirm no obstruction.
9.
Before a new refrigerating system is put into service, the person responsible for placing the system in operation should ensure that
trained and certified operating personnel are instructed on the basis of the instruction manual about the construction, supervision,
operation and maintenance of the refrigerating system, as well as the safety measures to be observed, and the properties and
handling of the refrigerant used.
10.
The general requirement of trained and certified personnel are indicated as below:
a) Knowledge of legislation, regulations and standards relating to flammable refrigerants; and,
b) Detailed knowledge of and skills in handling flammable refrigerants, personal protective equipment, refrigerant leakage prevention,
handling of cylinders, charging, leak detection, recovery and disposal; and,
c) Able to understand and to apply in practice the requirements in the national legislation, regulations and Standards; and,
d) Continuously undergo regular and further training to maintain this expertise.
11. Protect the refrigerating system from accidental rupture due to moving furniture or reconstruction activities.
12.
To ensure no leaking, refrigerant joints shall be tightness tested. The test method shall have a sensitivity of 5 grams per year of
refrigerant or better under a pressure of at least 0,25 times the maximum allowable pressure (>1.04MPa, max 4.3MPa). No leak shall
be detected.

7
CAUTION
1.
Installation (Space)
 Must comply with national gas regulations, state municipal rules and legislation. Notify relevant authorities in accordance with all
applicable regulations.
 Must ensure mechanical connections be accessible for maintenance purposes.
 In cases that require mechanical ventilation, ventilation openings shall be kept clear of obstruction.
 When disposal of the product, do follow to the precautions in #12 and comply with national regulations.
 Always contact to local municipal offices for proper handling.
2.
Servicing
2-1. Service personnel
 Any qualified 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.
 Servicing shall be performed only as recommended by the manufacturer.
 The system is inspected, regularly supervised and maintained by a trained and certified service personnel who is employed by
the person user or party responsible.
 Ensure refrigerant charge not to leak.
2-2. Work
 Prior to beginning work on systems containing flammable refrigerants, safety checks are necessary to ensure that the risk of
ignition is minimised.
For repair to the refrigerating system, the precautions in #2-2 to #2-8 must be followed before conducting work on the system.
 Work shall be undertaken under a controlled procedure so as to minimize the risk of a flammable gas or vapour being present
while the work is being performed.
 All maintenance staff and others working in the local area shall be instructed and supervised on the nature of work being carried
out.
 Avoid working in confined spaces. Always ensure away from source, at least 2 meter of safety distance, or zoning of free space
area of at least 2 meter in radius.
 Wear appropriate protective equipment, including respiratory protection, as conditions warrant.
 Keep all sources of ignition and hot metal surfaces away.
2-3. Checking for presence of refrigerant
 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.
 In case of leakage/spillage happened, immediately ventilate area and stay upwind and away from spill/release.
 In case of leakage/spillage happened, do notify persons down wind of the leaking/spill, isolate immediate hazard area and keep
unauthorized personnel out.
2-4. Presence of fire extinguisher
 If any hot work is to be conducted on the refrigerating equipment or any associated parts, appropriate fire extinguishing
equipment shall be available at hand.
 Have a dry powder or CO2 fire extinguisher adjacent to the charging area.
2-5. No ignition sources
 No person carrying out work in relation to a refrigerating 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.
He/She must not be smoking when carrying out such work.
 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.
2-6. 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.
2-7. Checks to the refrigerating 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 ventilation machinery and outlets are operating adequately and are not obstructed.
- Marking to the equipment continues to be visible and legible. Markings and signs that are illegible shall be corrected.

8
CAUTION
2.
2-8. Checks to electrical devices
 Repair and maintenance to electrical components shall include initial safety checks and component inspection procedures.
 Initial safety checks shall include but not limit to:-
- That capacitors are discharged: this shall be done in a safe manner to avoid possibility of sparking.
- That there is no live electrical components and wiring are exposed while charging, recovering or purging the system.
- That there is continuity of earth bonding.
 At all times the manufacturer’s maintenance and service guidelines shall be followed.
 If in doubt consult the manufacturer’s technical department for assistance.
 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.
 The owner of the equipment must be informed or reported so all parties are advised thereinafter.
3.
Repairs to sealed components
 During repairs to sealed components, all electrical supplies shall be disconnected from the equipment 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.
 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.
4.
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. Unspecified parts by manufacturer may result ignition of
refrigerant in the atmosphere from a leak.
5.
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 sou
r
ces such as compressors or fans.
6.
Detection of flammable refrigerants
 Under no circumstances shall potential sources of ignition be used in the searching or detection of refrigerant leaks.
 A halide torch (or any other detector using a naked flame) shall not be used.
7.
The following leak detection methods are deemed acceptable for all refrigerant systems.
 No leaks shall be detected when using detection equipment with a sensitivity of 5 grams per year of refrigerant or better under a
pressure of at least 0,25 times the maximum allowable pressure (>1.04MPa, max 4.3MPa). For example, a universal sniffer.
 Electronic leak detectors may 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 also suitable for use with most refrigerants, for example, bubble method and fluorescent method agents.
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.
The precautions in #8 must be followed to remove the refrigerant.

9
CAUTION
8.
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 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 purged with OFN to render the appliance safe. (remark: OFN = oxygen free nitrogen, type of inert gas)
 This process may need to be repeated several times.
 Compressed air or oxygen shall not be used for this task.
 Purging 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 potential ignition sources and there is ventilation available.
9.
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 in an appropriate position according to the instructions.
- Ensure that the refrigerating 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 over fill the refrigerating system.
 Prior to recharging the system it shall be pressure tested with OFN (refer to #7).
 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.
 Electrostatic charge may accumulate and create a hazardous condition when charging and discharging the refrigerant.
To avoid fire or explosion, dissipate static electricity during transfer by grounding and bonding containers and equipment before
charging/discharging.
10.
Decommissioning
 Before carrying out this procedure, it is essential that the technician is completely familiar with the equipment and all its details.
 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
recovered refrigerant.
 It is essential that electrical power is available before the task is commenced.
a) 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 instructions.
h) Do not over fill 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 refrigerating system unless it has been cleaned and checked.
 Electrostatic charge may accumulate and create a hazardous condition when charging or discharging the refrigerant.
To avoid fire or explosion, dissipate static electricity during transfer by grounding and bonding containers and equipment before
charging/discharging.
11.
Labelling
 Equipment shall be labelled 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.

10
CAUTION
12.
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 are available.
 All cylinders to be used are designated for the recovered refrigerant and labelled 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.
 Recovery cylinders are evacuated and, if possible, cooled before 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.

11
3. Specifications
3.1 WH-MXC09J3E8
Item Unit Refrigerant System
Performance Test Condition EN 14511 / EN 14825
POS (EAN) 5025232910748
Cooling Capacity
Condition
(Ambient/Water) A35W7
kW 9.00
BTU/h 30700
kcal/h 7740
Cooling EER
W/W 3.09
kcal/hW 2.66
Heating Capacity
Condition
(Ambient/Water) A7W35 A2W35
kW 9.00 9.00
BTU/h 30700 30700
kcal/h 7740 7740
Heating COP
W/W 5.08 3.81
kcal/hW 4.37 3.28
Heating ErP
Low temperature Application (W35)
Warmer Average Colder
Application Climate
Pdesign kW 9.0 9.0 11.0
Tbivalent / TOL °C 2 / 2 -10 / -10 -15 / -22
SCOP / ns (W/W) / % 6.47 / 256 4.96 / 195 4.31 / 169
Annual Consumption kWh 1859 3747 6289
Class A+++ A+++ A++
Medium temperature Application (W55)
Warmer Average Colder
Application Climate
Pdesign kW 9.0 9.0 11.0
Tbivalent / TOL °C 2 / 2 -10 / -10 -15 / -22
SCOP / ns (W/W) / % 4.34 / 171 3.57 / 140 3.26 / 127
Annual Consumption kWh 2772 5208 8327
Class A+++ A++ A++
Air Flow m³/min (ft³/min) Cooling: 95.1 (3360)
Heating: 69.2 (2440)
Refrigerant Control Device Expansion Valve
Refrigerant Oil cm³ FW50S (1200)
Refrigerant (R32) kg (oz) 1.60 (56.4)
F-GAS
GWP 675
CO2eq (ton) (Precharged / Maximum) 1.080 / -
Compressor
Type Hermetic Motor
Motor Type Brushless (4-poles)
Rated Output kW 3.0

12
Item Unit Refrigerant System
Fan
Type Propeller Fan
Material PP
Motor Type DC (8-poles)
Output Power W 60
Fan Speed rpm Cooling: 630 (Top), 670 (Bottom)
Heating: 440 (Top), 480 (Bottom)
Heat Exchanger
Fin Material Aluminium (Pre Coat)
Fin Type Corrugated Fin
Row x Stage x FPI 2 x 51 x 19
Size (W x H X L) mm 38.1 x 1259.4 x 903.7:873.8
Item Unit Mono bloc Unit
Dimension
Height mm (inch) 1410 (55-17/32)
Width mm (inch) 1283 (50-17/32)
Depth mm (inch) 320 (12-5/8)
Net Weight kg (lbs) 140 (309)
Noise Level
Condition
(Ambient/Water) A35W7 A7W35 A2W35
dB(A) Cooling: 50 Heating: 51 -
Power level dB Cooling: 68 Heating: 68
Heating: 65 -
Power Source (Phase, Voltage, Cycle)
Ø Three
V 400
Hz 50
Input Power
Condition
(Ambient/Water) A35W7 A7W35 A2W35
kW Cooling: 2.91 Heating: 1.77 Heating: 2.36
Maximum Input Power for Heatpump System kW 6.99k
Power Supply 1 : Phase (Ø) / Max. Current (A) / Max. Input Power (W) 3Ø / 14.7 / 9.99k
Power Supply 2 : Phase (Ø) / Max. Current (A) / Max. Input Power (W) 1Ø / 13.0 / 3.00k
Power Supply 3 : Phase (Ø) / Max. Current (A) / Max. Input Power (W) - / - / -
Starting current A 4.3
Running Current
Condition
(Ambient/Water) A35W7 A7W35 A2W35
A Cooling: 4.3 Heating: 2.6 Heating: 3.5
Maximum Current for Heatpump System A 10.4
Power Factor
Power factor means total figure of compressor and
outdoor fan motor.
Condition
(Ambient/Water) A35W7 A7W35 A2W35
% Cooling: 97 Heating: 97 Heating: 97
Power Cord
Number of core -
Length m (ft) -
Thermostat Electronic Control
Protection Device Electronic Control

13
Item Unit Water System
Performance Test Condition EN 14511 / EN 14825
POS (EAN) 5025232910748
Operation Range
Outdoor Ambient °C (min. / max.) Cooling: 10 / 43
Heating: -20 / 35
Water Outlet °C (min. / max.)
Cooling: 5 / 20
Heating (Circuit): 20 / 55 (Below Ambient -20°C) *3
20 / 60 (Ambient -15 ~ 0°C or
Above Ambient 25°C) *3
20 / 65 (Ambient 5 ~ 20°C) *3*4
Internal Pressure Differential kPa Cooling: 35.0
Heating: 35.0
Water Pipe Diameter
Inlet inch 1-1/4
Outlet inch 1-1/4
Water Drain Hose Inner Diameter mm (inch) 15.00 (19/32)
Pump
Motor Type DC Motor
Input Power W 173
Hot Water Coil
Type Brazed Plate
No. of Plates 38
Size (H x W x L) mm 71.4 x 121 x 333
Water Flow Rate l/min (m³/h) Cooling: 25.8 (1.5)
Heating: 25.8 (1.5)
Pressure Relief Valve Water Circuit kPa Open: 300, Close: 266 and below
Flow Switch Type Electronic Sensor
Protection Device A Residual Current Circuit Breaker (25)
Residual Current Circuit Breaker (40)
Expansion Vessel
Volume l 10
MWP bar 3
Capacity of Integrated Electric Heater kW / °C 3.00
Note:
 Cooling capacities are based on outdoor air temperature of 35°C Dry Bulb with controlled indoor water inlet
temperature of 12°C and water outlet temperature of 7°C.
 Heating capacities are based on outdoor air temperature of 7°C Dry Bulb (44.6°F Dry Bulb), 6°C Wet Bulb
(42.8°F Wet Bulb) with controlled indoor water inlet temperature of 30°C and water outlet temperature of 35°C.
 Specification are subjected to change without prior notice for further improvement.
 Flow rate indicated are based on nominal capacity adjustment of leaving water temperature (LWT) 35°C and
ΔT 5°C
 The unit will restart automatically after the outdoor temperature returns to the specified range.
 *
3 Between outdoor ambient -15°C and -20°C, the water outlet temperature gradually decreases from 60°C to
55°C.
 *
3 Between outdoor ambient 5°C and 0°C, the water outlet temperature gradually decreases from 65°C to 60°C.
 *
3 Between outdoor ambient 20°C and 25°C, the water outlet temperature gradually decreases from 65°C to
60°C.
 *
4 Only when ΔT is set to 15°C, the set temperature above 60°C will take effect.

14
3.2 WH-MXC12J9E8
Item Unit Refrigerant System
Performance Test Condition EN 14511 / EN 14825
POS (EAN) 5025232910700
Cooling Capacity
Condition
(Ambient/Water) A35W7
kW 12.00
BTU/h 41000
kcal/h 10320
Cooling EER
W/W 2.84
kcal/hW 2.44
Heating Capacity
Condition
(Ambient/Water) A7W35 A2W35
kW 12.00 12.00
BTU/h 41000 41000
kcal/h 10320 10320
Heating COP
W/W 4.80 3.53
kcal/hW 4.13 3.04
Heating ErP
Low temperature Application (W35)
Warmer Average Colder
Application Climate
Pdesign kW 9.0 9.0 11.0
Tbivalent / TOL °C 2 / 2 -10 / -10 -15 / -22
SCOP / ns (W/W) / % 6.47 / 256 4.96 / 195 4.31 / 169
Annual Consumption kWh 1859 3747 6289
Class A+++ A+++ A++
Medium temperature Application (W55)
Warmer Average Colder
Application Climate
Pdesign kW 9.0 9.0 11.0
Tbivalent / TOL °C 2 / 2 -10 / -10 -15 / -22
SCOP / ns (W/W) / % 4.34 / 171 3.57 / 140 3.26 / 127
Annual Consumption kWh 2772 5208 8327
Class A+++ A++ A++
Air Flow m³/min (ft³/min) Cooling: 102.4 (3620)
Heating: 76.8 (2710)
Refrigerant Control Device Expansion Valve
Refrigerant Oil cm³ FW50S (1200)
Refrigerant (R32) kg (oz) 1.60 (56.4)
F-GAS
GWP 675
CO2eq (ton) (Precharged / Maximum) 1.080 / -
Compressor
Type Hermetic Motor
Motor Type Brushless (4-poles)
Rated Output kW 3.0

15
Item Unit Refrigerant System
Fan
Type Propeller Fan
Material PP
Motor Type DC (8-poles)
Output Power W 60
Fan Speed rpm Cooling: 680 (Top), 720 (Bottom)
Heating: 490 (Top), 530 (Bottom)
Heat Exchanger
Fin Material Aluminium (Pre Coat)
Fin Type Corrugated Fin
Row x Stage x FPI 2 x 51 x 19
Size (W x H X L) mm 38.1 x 1259.4 x 903.7:873.8
Item Unit Mono bloc Unit
Dimension
Height mm (inch) 1410 (55-17/32)
Width mm (inch) 1283 (50-17/32)
Depth mm (inch) 320 (12-5/8)
Net Weight kg (lbs) 140 (309)
Noise Level
Condition
(Ambient/Water) A35W7 A7W35 A2W35
dB(A) Cooling: 52 Heating: 52 Heating: 52
Power level dB Cooling: 69 Heating: 69
Heating: 65
Heating: 69
Heating: 65
Power Source (Phase, Voltage, Cycle)
Ø Three
V 400
Hz 50
Input Power
Condition
(Ambient/Water) A35W7 A7W35 A2W35
kW Cooling: 4.23 Heating: 2.50 Heating: 3.40
Maximum Input Power for Heatpump System kW 7.93k
Power Supply 1 : Phase (Ø) / Max. Current (A) / Max. Input Power (W) 3Ø / 11.8 / 7.93k
Power Supply 2 : Phase (Ø) / Max. Current (A) / Max. Input Power (W) 3Ø / 13.0 / 9.00k
Power Supply 3 : Phase (Ø) / Max. Current (A) / Max. Input Power (W) - / - / -
Starting current A 6.3
Running Current
Condition
(Ambient/Water) A35W7 A7W35 A2W35
A Cooling: 6.3 Heating: 3.7 Heating: 5.1
Maximum Current for Heatpump System A 11.8
Power Factor
Power factor means total figure of compressor and
outdoor fan motor.
Condition
(Ambient/Water) A35W7 A7W35 A2W35
% Cooling: 97 Heating: 97 Heating: 97
Power Cord
Number of core -
Length m (ft) -
Thermostat Electronic Control
Protection Device Electronic Control

16
Item Unit Water System
Performance Test Condition EN 14511 / EN 14825
POS (EAN) 5025232910700
Operation Range
Outdoor Ambient °C (min. / max.) Cooling: 10 / 43
Heating: -20 / 35
Water Outlet °C (min. / max.)
Cooling: 5 / 20
Heating (Circuit): 20 / 55 (Below Ambient -20°C) *3
20 / 60 (Ambient -15 ~ 0°C or
Above Ambient 25°C) *3
20 / 65 (Ambient 5 ~ 20°C) *3*4
Internal Pressure Differential kPa Cooling: 55
Heating: 55
Water Pipe Diameter
Inlet inch 1-1/4
Outlet inch 1-1/4
Water Drain Hose Inner Diameter mm (inch) 15.00 (19/32)
Pump
Motor Type DC Motor
Input Power W 173
Hot Water Coil
Type Brazed Plate
No. of Plates 38
Size (H x W x L) mm 71.4 x 121 x 333
Water Flow Rate l/min (m³/h) Cooling: 34.4 (2.1)
Heating: 34.4 (2.1)
Pressure Relief Valve Water Circuit kPa Open: 300, Close: 266 and below
Flow Switch Type Electronic Sensor
Protection Device A Residual Current Circuit Breaker (25)
Residual Current Circuit Breaker (25)
Expansion Vessel
Volume l 10
MWP bar 3
Capacity of Integrated Electric Heater kW / °C 9.00
Note:
 Cooling capacities are based on outdoor air temperature of 35°C Dry Bulb with controlled indoor water inlet
temperature of 12°C and water outlet temperature of 7°C.
 Heating capacities are based on outdoor air temperature of 7°C Dry Bulb (44.6°F Dry Bulb), 6°C Wet Bulb
(42.8°F Wet Bulb) with controlled indoor water inlet temperature of 30°C and water outlet temperature of 35°C.
 Specification are subjected to change without prior notice for further improvement.
 Flow rate indicated are based on nominal capacity adjustment of leaving water temperature (LWT) 35°C and
ΔT 5°C
 The unit will restart automatically after the outdoor temperature returns to the specified range.
 *
3 Between outdoor ambient -15°C and -20°C, the water outlet temperature gradually decreases from 60°C to
55°C.
 *
3 Between outdoor ambient 5°C and 0°C, the water outlet temperature gradually decreases from 65°C to 60°C.
 *
3 Between outdoor ambient 20°C and 25°C, the water outlet temperature gradually decreases from 65°C to
60°C.
 *
4 Only when ΔT is set to 15°C, the set temperature above 60°C will take effect.

17
4. Features
 Inverter Technology
- Energy saving
 High Efficiency
 Compact Design
 Environment Protection
- Non-ozone depletion substances refrigerant (R32)
 Easy to use control panel
 Weekly Timer setting
 Quality Improvement
- Random auto restart after power failure for safety restart operation
- Gas leakage protection
- Prevent compressor reverse cycle
- Inner protector to protect compressor
 Serviceability Improvement
- Breakdown Self Diagnosis function
- System Status Check Buttons for servicing purpose
- System Pumpdown Button for servicing purpose
- Front maintenance design for outdoor unit
 Operation Condition
HEATING (CIRCUIT) *1, *2 COOLING (CIRCUIT)
Water outlet temperature (°C)
(Min. / Max.)
20 / 55 (Below Ambient -20°C) *3
20 / 60 (Ambient -15 ~ 0°C or
Above Ambient 25°C) *3
20 / 65 (Ambient 5 ~ 20°C) *3 *4
5 / 20
Outdoor ambient temperature (°C)
(Min. / Max.) -20 / 35 10 / 43
When the outdoor temperature is out of the range in the table, the heating capacity will drop significantly and the
mono bloc unit may stop operating for its protection.
The unit will restart automatically after the outdoor temperature returns to the specified range.
*3 Between outdoor ambient -15°C and -20°C, the water outlet temperature gradually decreases from 60°C to 55°C.
*3 Between outdoor ambient 5°C and 0°C, the water outlet temperature gradually decreases from 65°C to 60°C.
*3 Between outdoor ambient 20°C and 25°C, the water outlet temperature gradually decreases from 65°C to 60°C.
*4 Only when ΔT is set to 15°C, the set temperature above 60°C will take effect.

18
5. Location of Controls and Components
5.1 Indoor Unit
5.1.1 Remote Controller buttons and display
Buttons / Indicator
1
Quick Menu button
(For more details, refer to the separate
Quick Menu Guide.)
2Back button
Returns to the previous screen
3LCD Display
4Main Menu button
For function setup
5ON/OFF button
Starts/Stops operation
6
Operation indicator
Illuminates during operation, blinks during
alarm.
Press centre
No glove
No pen
2
1
4
5
6
3
Cross key buttons
Selects an item.
Enter button
Fixes the selected content.
Up
Down
RightLeft

19
Display
1Mode selection
*
1,
*
2
AUTO • Depending on the preset outdoor
temperature, the system selects
HEAT or *
1,
*
2
COOL operation
mode.
Auto Heat Auto Cool
*
1,
*
2
COOL • COOL operation is either turned
ON or OFF.
• The unit provides cooling to the
system.
*
1,
*
2
AUTO
+ TANK
• Depending on the preset outdoor
temperature, the system selects
HEAT + TANK or *
1,
*
2
COOL +
TANK operation mode.
Auto Heat Auto Cool
*
1,
*
2
COOL
+ TANK
• The unit provides cooling to the
system.
• The unit provides heating when
boiling tank.
HEAT • HEAT operation is either turned
ON or OFF.
• The unit provides heat to the
system.
TANK • TANK operation is either turned
ON or OFF.
• The unit provides heat to the
water tank.
HEAT
+ TANK
• The unit provides heat to the
water tank and the system.
• This mode can be selected only
when the water tank is installed.
* The direction icons point to the currently
active mode.
• Room operation / Tank operation.
• Deice operation.
2Operation icons
The status of operation is displayed.
Icon will not display (under operation OFF screen) whenever operation is OFF except weekly timer.
Holiday operation status Weekly Timer operation status Quiet operation status
Zone: Room Thermostat
→Internal sensor status Powerful operation status Demand Control or SG ready or SHP status
Room Heater status Tank Heater status Solar status
Bivalent status
(Boiler)
*
1
The system is locked to operate without COOL mode. It can be unlocked only by authorised installers or our authorised service partners.
*
2
Only displayed when COOL mode is unlocked (This means when COOL mode is available).
2 43
1
5
6
7
3Temperature of each zone
4Time and day
5Water Tank temperature
6Outdoor temperature
7Sensor type/Set temperature type icons
Water Temperature
→Compensation curve
Water Temperature
→Direct Pool only
Room Thermostat
→External
Room Thermostat
→Internal Room Thermistor

20
5.1.2 Initialization
Before starting to install the various menu settings, please initiate the Remote Controller by selecting the language of
operation and installing the date and time correctly.
setting of the menu.
Selecting the language LCD blinking
Wait while the display is initializing.
When initializing screen ends, it turns to
normal screen.
When any button is pressed, language
setting screen appears.
1Scroll with and to select the language.
2Press
Setting the clock
1Select with or how to display the time,
either 24h or am/pm format (for example, 15:00
or 3:00 pm).
2Press to confirm the selection.
3Use and to select year, month, day, hour
and minutes. (Select and move with and
press to confirm.)
4Once the time is set, time and day will appear
on the display even if the Remote Controller is
turned OFF.
When power is turned on for the first time, it becomes the setting screen automatically. It can also be set from personal
to confirm the selection.
5.1.3 Quick Menu
After the initial settings have been completed, you can select a quick menu from the following options and edit the setting.
1Press to display the quick menu.
Force DHW Powerful Quiet Force Heater
Weekly Timer Force Defrost Error Reset R/C Lock
2Use to select menu.
3Press to turn on/off the select menu.