Panasonic WH-MDF12C6E5 Service Manual
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Panasonic WH-MDF12C6E5 Service Manual

(mono bloc) air-to-water heatpump system
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See also: Installation Manual
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 product or products dealt with in this service information by anyone else could result in serious injury or death.
In order to avoid frostbite, be assured of no refrigerant leakage during the installation or repairing of refrigerant circuit.
Mono Bloc Unit
WH-MDF12C6E5
WH-MDF14C6E5
WH-MDF16C6E5
(WH-MDF12C6E5-1)
(WH-MDF14C6E5-1)
(WH-MDF16C6E5-1)
WARNING
PRECAUTION OF LOW TEMPERATURE
© Panasonic Appliances Air-Conditioning (M) Sdn. Bhd. 2012.
Unauthorized copying and distribution is a violation of law.
Order No. PAPAMY1205131CE

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Summary of Contents for Panasonic WH-MDF12C6E5

  • Page 1 PRECAUTION OF LOW TEMPERATURE In order to avoid frostbite, be assured of no refrigerant leakage during the installation or repairing of refrigerant circuit. © Panasonic Appliances Air-Conditioning (M) Sdn. Bhd. 2012. Unauthorized copying and distribution is a violation of law.

  • Page 2: Table Of Contents

    1. Safety Precautions ..........3 14.4 Expansion Vessel Pre Pressure 2. Specifications .............5 Checking ............. 64 15. Maintenance Guide.......... 65 WH-MDF12C6E5 (WH-MDF12C6E5-1) ..5 WH-MDF14C6E5 (WH-MDF14C6E5-1) ..7 16. Troubleshooting Guide........67 WH-MDF16C6E5 (WH-MDF16C6E5-1) ..9 16.1 Refrigeration Cycle System ......67 3. Features.............11 16.2 Relationship Between The Condition Of...

  • Page 3: Safety Precautions

    1. Safety Precautions Read the following “SAFETY PRECAUTIONS” carefully before perform any servicing. Electrical work and water installation work must be installed or serviced by a licensed electrician and licensed water system installer respectively. Be sure to use the correct rating and main circuit for the model installed. The caution items stated here must be followed because these important contents are related to safety.
  • Page 4 19. 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. 20. 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.

  • Page 5: Specifications

    2. Specifications WH-MDF12C6E5 (WH-MDF12C6E5-1) Item Unit Refrigerant System Performance Test Condition EN 14511 Condition (Ambient/Water) A7W35 A2W35 Heating Capacity 12.00 11.40 BTU/h 41000 38900 kcal/h 10320 9800 4.67 3.41 kcal/hW 4.02 2.94 Air Flow /min (ft /min) 80.0 (2830) Refrigeration Control Device...
  • Page 6 Item Unit Mono bloc Unit Maximum Current For Internal Heater 26 (39) (Back-up Heater + Tank Heater) Power Factor Power factor means total figure of compressor and outdoor fan motor. Power Cord Number of core Length m (ft) Thermostat Electronic Control Protection Device Electronic Control Item...

  • Page 7: Wh-Mdf14C6E5 (Wh-Mdf14C6E5-1)

    WH-MDF14C6E5 (WH-MDF14C6E5-1) Item Unit Refrigerant System Performance Test Condition EN 14511 Condition (Ambient/Water) A7W35 A2W35 Heating Capacity 14.00 12.40 BTU/h 47800 42300 kcal/h 12040 10660 4.50 3.32 kcal/hW 3.87 2.86 Air Flow /min (ft /min) 84.0 (2970) Refrigeration Control Device Expansion Valve Refrigeration Oil FV50S (1200)
  • Page 8 Item Unit Mono bloc Unit Power Factor Power factor means total figure of compressor and outdoor fan motor. Power Cord Number of core Length m (ft) Thermostat Electronic Control Protection Device Electronic Control Item Unit Water System Performance Test Condition EN 14511 Operation Range Outdoor Ambient...

  • Page 9: Wh-Mdf16C6E5 (Wh-Mdf16C6E5-1)

    WH-MDF16C6E5 (WH-MDF16C6E5-1) Item Unit Refrigerant System Performance Test Condition EN 14511 Condition (Ambient/Water) A7W35 A2W35 Heating Capacity 16.00 13.00 BTU/h 54600 44300 kcal/h 13760 11180 4.23 3.25 kcal/hW 3.64 2.80 Air Flow /min (ft /min) 90.0 (3180) Refrigeration Control Device Expansion Valve Refrigeration Oil FV50S (1200)
  • Page 10 Item Unit Mono bloc Unit Power Factor Power factor means total figure of compressor and outdoor fan motor. Power Cord Number of core Length m (ft) Thermostat Electronic Control Protection Device Electronic Control Item Unit Water System Performance Test Condition EN 14511 Operation Range Outdoor Ambient...

  • Page 11: Features

    3. Features Inverter Technology - Energy saving High Efficiency Compact Design Environment Protection - Non-ozone depletion substances refrigerant (R410A) Easy to use remote control 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...

  • Page 12: Location Of Controls And Components

    4. Location of Controls and Components Mono bloc Unit...
  • Page 13 4.1.1 Main Components...
  • Page 14 4.1.2 Location of Control 4.1.2.1 Remote Control The user interface allows the installer and user to setup, use and maintain the unit.
  • Page 17 4.1.3 Weekly Timer Setting...
  • Page 18 4.1.4 Setting Up The Special Functions...

  • Page 19: Dimensions

    5. Dimensions Mono bloc Unit...

  • Page 20: Refrigeration And Water Cycle Diagram

    6. Refrigeration and Water Cycle Diagram...

  • Page 22: Block Diagram

    7. Block Diagram...

  • Page 23: Wiring Connection Diagram

    8. Wiring Connection Diagram...

  • Page 25: Electronic Circuit Diagram

    9. Electronic Circuit Diagram...

  • Page 27: Printed Circuit Board

    10. Printed Circuit Board 10.1 Water System 10.1.1 Main Printed Circuit Board...
  • Page 28 10.1.2 Solar Printed Circuit Board (Optional)

  • Page 29: Refrigerant System

    10.2 Refrigerant System 10.2.1 Main Printed Circuit Board...
  • Page 30 10.2.2 Capacitor Printed Circuit Board 10.2.3 Noise Filter Printed Circuit Board...

  • Page 31: Installation Instruction Mono Bloc Unit

    11. Installation Instruction Mono Bloc Unit Dimension Diagram...
  • Page 32 Main Components...

  • Page 33: Select The Best Location

    11.1 Select the Best Location 11.2 Mono Bloc Unit Installation Mono bloc unit will become heavy when filled with Install the Mono bloc unit in outdoor locations only. water. Please install the unit on a strong concrete floor Avoid installations in areas where the ambient and consider the weight of the unit and water.

  • Page 34: Piping Installation

    11.3 Piping Installation WARNING This section is for authorized and licensed electrician / water system installer only. Work behind the front plate secured by screws must only be carried out under supervision of qualified contractor, installation engineer or service person. Please engage a licensed water circuit installer to install this water circuit.

  • Page 35: Connect The Cord And Cable To Mono Bloc Unit

    11.4 Connect The Cord And Cable To Mono Bloc Unit (REFER TO WIRING DIAGRAM AT UNIT FOR DETAIL) An isolating device must be connected to the power supply cable. Isolating device (Disconnecting means) should have minimum 3.0 mm contact gap. Connect the approved polychloroprene sheathed power supply 1 cord (3 x 4.0 or 6.0 mm ) and power supply 2 cord (3 x 4.0 mm...
  • Page 36 Connecting with external device (optional) All connections shall follow to the local national wiring standard. It is strongly recommended to use manufacturer-recommended parts and accessories for installation. Maximum output power of booster heater shall be ≤ 3 kW. Booster Heater cord must be (3 x min 1.5 mm ), of type designation 60245 IEC 57 or heavier.
  • Page 37 11.4.1 Wire Stripping And Connecting Requirement 11.4.2 Connecting Requirement The equipment’s power supply 1 complies with IEC/EN 61000-3-12 provided that the short-circuit power S greater than or equal to (Refer below table) at the interface point between the user’s supply and the public system.
  • Page 38 A. If Remote Control Cable Is Embedded Embed an outlet box (JIS C 8336) into the wall. Outlet box may be purchased separately. Medium-sized square outlet box (obtain locally) Part No. DS3744 (Panasonic Co., Ltd.) or equivalent. 11.4.3.2 Installing The Remote Control...
  • Page 39 Insert firmly the connector of remote control 11.4.3.3 Connecting The Remote cable (2) to connector (CON1) in the upper Control Cable To Mono Bloc case circuit board. [Refer to the illustration at Unit below.] Secure the remote control upper case to the CAUTION lower case with the tabs provided.

  • Page 40: Operation And Control

    12. Operation and Control 12.1 Basic Function Inverter control, which equipped with a microcomputer in determining the most suitable operating mode as time passes, automatically adjusts output power for maximum comfort always. In order to achieve the suitable operating mode, the microcomputer maintains the set temperature by measuring the temperature of the environment and performing temperature shifting.
  • Page 41 Booster heater control - Booster heater turn On and Off follow normal operation. - Booster heater turn ON condition: During startup time (initialization), Booster heater turn ON after DELAY TIMER. When tank temperature lower than HEATER ON TEMP 20 minutes from previous heater off. - Booster heater turn OFF condition: When tank temperature higher than tank set temperature for continuous 15 secs.
  • Page 43 12.1.4 Heat + Tank Mode Operation Setting 1: When Heating priority is set by remote control: 3 ways valve control: 3 ways valve switch to room side during External Room Thermo ON OR Solar 3 ways valve ON OR Tank Thermo OFF time, and switch to tank side at External Room Thermo OFF AND Solar 3 ways valve Heat pump operation control:- During External Room Thermo ON time: (When room thermo ON, heat pump must operate to room side)
  • Page 44 Switch back 3 ways valve to room side, Heat pump and water pump turn OFF, IF External Room Thermo ON back OR Under Solar Priority Set condition: Tank temperature > Tank THERMO OFF TEMP. for continuous 3 minutes OR Solar Valve Under Solar Priority Not Set condition: Tank temperature >...
  • Page 45 Solar 3 way valve: Solar 3 way valve operates follow solar operation specification. * Under solar priority is set condition, when solar 3WV turn ON, booster heater will turn OFF and 3 ways valve switch to room side. * Under solar priority is not set condition, solar 3WV will OFF when heat pump operate to tank side. 2 way valve opens.
  • Page 46 Setting 2: When heating priority is not set by remote control: When Solar Priority is set / not set by remote control: 3 ways valve control: 3 ways valve switch to room side during heating heat-up interval, and switch to tank side during tank heat-up interval.
  • Page 47 - Tank interval will end and start heating interval timer, IF When this condition happen at tank side before case 1 thermo-off. 3WV switch to room side compulsory and continue until complete room interval. Tank interval timer finish AND External Room Thermo ON OR Fulfill above Case 1 of thermo off condition.
  • Page 50 12.1.5 Setting Water Outlet Temperature for Heat Mode The set temperature define the parameters for the outdoor ambient temperature dependent operation of the unit. Where by the internal water setting temperature is determined automatically depending on the outdoor temperature. The colder outdoor temperatures will result in warmer water and vice versa. The user has the possibility to shift up or down the target water temperature by remote control setting.

  • Page 51: Water Pump

    12.1.7 Fan Motor Operation Fan motor is adjusted according to operation condition. It starts when compressor starts operation and it stops 30 seconds after compressor stops operation. 12.2 Water Pump 12.2.1 Water Pump Control Once the indoor unit is ON, the water pump will be ON immediately and no error judgement for 9 minutes. However, during this 9 minutes operation, if there is any abnormality cause at outdoor or malfunction, the compressor should be OFF immediately and restart delay after 3 minutes.

  • Page 52: Pump Down Operation

    12.3 Pump Down Operation Purpose Ensure the pump down operation when relocating or disposing of the unit. The pump down operation will extract all refrigerant from the piping into the mono bloc unit. Pump down operation control: Press the SERVICE S/W for continuous 5 secs to enter Service mode. In service mode, select Sr:01 and press SET S/W to start Pump Down operation.

  • Page 53: Mono Bloc Unit Safety

    12.6 Mono Bloc Unit Safety 12.6.1 Mono Bloc Unit Safety Control When water pump is ON, the system will start checking flow switch status (ON/OFF). If the flow switch ON for 10 seconds, the system will check on the water inlet temperature for 10 seconds. If the water inlet temperature not exceeds 80°C, the water pump shall be continuously running with normal mode.

  • Page 54: Back-Up Heater Control

    12.9 Back-Up Heater Control 12.9.1 Electric Heater Control Normal Heating Mode Heater On condition: a. Heater switch is ON b. After Heatpump thermo ON for [30] mins c. After water pump operate [9] mins d. Outdoor air temperature < Outdoor set temperature for heater e.

  • Page 55: Base Pan Heater Control (Optional)

    Booster heater Turn Off condition: Tank temperature > Tank set temperature + [0°C] for continuous 15 secs When BOOSTER HEATER DELAY TIMER start count after switch from heating heat-up interval to tank heat-up interval * DELAY TIMER can be set by remote control. 12.11 Base Pan Heater Control (Optional) To enable the base pan heater function, pin 3 of SW2 of water system PCB has to be switched from OFF to ON position.

  • Page 56: Sterilization Mode

    12.13 Sterilization Mode Purpose: Boil tank temperature to customer set boiling temperature to operate sterilization. Control start condition: Tank connection set to YES by remote controller Sterilization function selection is YES Sterilization signal received from remote controller by timer. Control stop condition: After boiling timer completed.

  • Page 57: Solar Operation (Optional)

    2. Backup heater anti freeze control: Backup heater turns ON when ALL the below conditions are fulfilled: Water inlet/outlet temp. < 6°C Water pump circulation anti freeze control activated, and water pump ON for 4 minutes Backup heater turns OFF when ANY of the below conditions is fulfilled: Water inlet/outlet temp.
  • Page 58 Stop condition: 3 way valve stops operating when: No power supply to unit OR There is NO operation request from solar pump station OR Tank hot water temp is above solar off upper limit temp 80°C. Heat pump thermo ON and operate to tank side. (during operation ON and tank mode selected).

  • Page 60: External Room Thermostat Control (Optional)

    12.17 External Room Thermostat Control (Optional) Purpose: Better room temperature control to fulfill different temperature request by external room thermostat. Recommended external room thermostat: Maker Characteristic Siemen (REV200) Touch panel Siemen (RAA20) Analog Connection external room thermostat: Wire Connection and thermo characteristic of Siemen REV200: Setting L/L1 (H) Heat Thermo...

  • Page 61: Protection Control

    13. Protection Control 13.1 Protection Control For All Operations 13.1.1 Time Delay Safety Control The compressor will not start for three minutes after stop of operation. 13.1.2 30 Seconds Forced Operation Once the compressor starts operation, it will not stop its operation for 30 seconds. However, it can be stopped using remote control.

  • Page 62: Low Pressure Protection Control

    13.1.6 Low Pressure Protection Control Purpose: To protect the system operation. Detection period: After compressor on for 5 minutes. Detection conditions: When detection of Tem above 30°C. Calculation of average evaporation temperature (Tem). Use outdoor low pressure sensor. Tem use the value calculated for discharge temperature setting value. After detection: Compressor stops restart again after 3 mins.

  • Page 63: Protection Control For Heating Operation

    13.1.10 Crank Case Heater Control Purpose: - For compressor protection during low outdoor ambient operation (during heating low temperature operation). Control content: a. Trigger heater START condition When the outdoor air temperature is 4°C or below, and discharge temperature is 12°C or below. b.

  • Page 64: Servicing Mode

    14. Servicing Mode 14.1 Test Run Fill up the Tank Unit with water. For details refer to Tank Unit installation instruction and operation instruction. Antifreeze agent must be added into water circuit to prevent freezing of water when outdoor ambient temperatures is low.

  • Page 65: Maintenance Guide

    15. Maintenance Guide In order to ensure optimal performance of the unit, seasonal inspections on the unit, external filter and field wiring have to be carried out at regular intervals. This maintenance should be carried out by authorized dealer. Water pressure Water pressure should not lower than 0.05 MPa (with inspects the pressure gauge).
  • Page 66 Reset overload protector Overload Protector serves the safety purpose to prevent the water over heating. When the Overload Protector trip at high water temperature, take below steps to reset it. Take out OLP Cover. Use a test pen to push the centre button gently in order to reset the Overload protector. Fix the OLP Cover to the original fixing condition.

  • Page 67: Troubleshooting Guide

    16. Troubleshooting Guide 16.1 Refrigeration Cycle System In order to diagnose malfunctions, make sure that there are no electrical problems before inspecting the refrigeration cycle. Such problems include insufficient insulation, problem with the power source, malfunction of a compressor and a fan.

  • Page 68: Relationship Between The Condition Of The Mono Bloc Unit And Pressure And Electric Current

    16.2 Relationship Between The Condition Of The Mono bloc Unit And Pressure And Electric Current Heating Mode Condition of the Mono bloc Unit Low Pressure High Pressure Electric current during operation Water leakage or insufficient water flow rate in the system Excessive amount of refrigerant Inefficient compression Insufficient refrigerant...

  • Page 69: Breakdown Self Diagnosis Function

    16.3 Breakdown Self Diagnosis Function 16.3.1 Self Diagnosis Function (Three Digits Alphanumeric Code) When abnormality occur during operation, the system will stop operation, and OFF/ON remote control LED will blink and error code will display on the remote control Timer display LCD. Even error code is reset by turning OFF power supply or by pressing ERROR RESET button, if the system abnormality is still un-repaired, system will again stop operation, and OFF/ON remote control LED will again blink.

  • Page 70: Error Codes Table

    16.4 Error Codes Table Diagnosis display Abnormality/Protection control Abnormality Judgement Primary location to verify No abnormality detected — — Indoor/Outdoor capacity unmatched 90s after power supply Indoor/outdoor connection wire Indoor/outdoor PCB Specification and combination table in catalogue Outdoor compressor temperature sensor Continue for 5 sec.
  • Page 71 Diagnosis display Abnormality/Protection control Abnormality Judgement Primary location to verify Outdoor heat exchanger temperature Continue for 5 sec. Outdoor heat exchanger temperature sensor abnormality sensor (defective or disconnected) Outdoor defrost sensor abnormality Continue for 5 sec. Outdoor defrost sensor (defective or disconnected) Indoor water outlet temperature sensor Continue for 5 sec.

  • Page 72: Self-Diagnosis Method

    16.5 Self-diagnosis Method 16.5.1 Connection Capability Rank Abnormality (H12) Malfunction Decision Conditions: During startup operation of heating, the capability rank of indoor checked by the outdoor is used to determine connection capability rank abnormality. Malfunction Caused: Wrong model interconnected. Wrong indoor unit or outdoor unit PCB (main) used. Faulty indoor unit or outdoor unit PCB (main).
  • Page 73 16.5.2 Compressor Tank Temperature Sensor Abnormality (H15) Malfunction Decision Conditions: During startup and operation of heating, the temperatures detected by the compressor tank temperature sensor are used to determine sensor error. Malfunction Caused: Faulty connector connection. Faulty sensor. Faulty outdoor unit PCB (main). Abnormality Judgment: Continue for 5 seconds.
  • Page 74 16.5.3 Indoor Refrigerant Liquid Temperature Sensor Abnormality (H23) Malfunction Decision Conditions: During startup and operation of heating, the temperatures detected by the indoor refrigerant liquid temperature sensor are used to determine sensor error. Malfunction Caused: Faulty connector connection. Faulty sensor. Faulty indoor unit PCB (main).
  • Page 75 16.5.4 Compressor Low Pressure Protection (H42) Malfunction Decision Conditions: During operation of heating and after 5 minutes compressor ON, when outdoor pipe temperature below -29°C or above 26°C is detected by the outdoor pipe temperature sensor. Malfunction Caused: Dust accumulation on the outdoor unit heat exchanger. Air short circuit at outdoor unit.
  • Page 76 16.5.5 Water Flow Switch Abnormality (H62) Malfunction Decision Conditions: During operation of heating, the water flow detected by the indoor water flow switch is used to determine water flow error. Malfunction Caused: Faulty water pump. Water leak in system. Faulty connector connection. Faulty water flow switch.
  • Page 77 16.5.6 Outdoor Low Pressure Abnormality (H63) Malfunction Decision Conditions: During operation of heating, when the outdoor low pressure sensor output signal is 0Vdc or 5Vdc. Malfunction Caused: Faulty connector connection. Faulty sensor. Faulty outdoor unit PCB (main). Abnormality Judgment: Continue 4 times in 20 minutes.
  • Page 78 16.5.7 Outdoor High Pressure Abnormality (H64) Malfunction Decision Conditions: During operation of heating, when the outdoor high pressure sensor output signal is 0Vdc or 5Vdc. Malfunction Caused: Faulty connector connection. Faulty sensor. Faulty outdoor unit PCB (main). Abnormality Judgment: Continue 4 times in 20 minutes.
  • Page 79 16.5.8 Indoor Backup Heater OLP Abnormality (H70) Malfunction Decision Conditions: During operation of indoor backup heater, when no power supplies to indoor backup heater or OLP open circuit. Malfunction Caused: Faulty power supply connector connection. Faulty connector connection. Faulty indoor backup heater overload protector (OLP). Faulty indoor unit PCB (main).
  • Page 80 16.5.9 Tank Temperature Sensor Abnormality (H72) Malfunction Decision Conditions: When tank connection is set to ON, the temperatures detected by the tank temperature sensor are used to determine sensor error. Malfunction Caused: Faulty connector connection. Faulty sensor. Faulty indoor unit PCB (main). Abnormality Judgment: Continue for 5 seconds.
  • Page 81 16.5.10 Indoor-Control Panel Communication Abnormality (H76) Malfunction Decision Conditions: During standby and operation of heating, indoor-remote control error occur. Malfunction Caused: Faulty connector connection. Faulty remote control. Faulty indoor unit PCB (main).
  • Page 82 16.5.11 Indoor/Outdoor Abnormal Communication (H90) Malfunction Decision Conditions: During operation of heating, the data received from outdoor unit in indoor unit signal transmission is checked whether it is normal. Malfunction Caused: Faulty outdoor unit PCB (main). Faulty indoor unit PCB (main). Indoor-outdoor signal transmission error due to wrong wiring.
  • Page 83 16.5.12 Tank Booster Heater OLP Abnormality (H91) Malfunction Decision Conditions: During operation of tank booster heater, and tank booster heater OLP open circuit. Malfunction Caused: Faulty connector connection. Faulty tank booster heater overload protector (OLP). Faulty indoor unit PCB (main). Abnormality Judgment: Continue for 60 seconds.
  • Page 84 16.5.13 Unspecified Voltage between Indoor and Outdoor (H95) Malfunction Decision Conditions: The supply power is detected for its requirement by the indoor/outdoor transmission. Malfunction Caused: Insufficient power supply. Faulty outdoor unit PCB (noise filter/main).
  • Page 85 16.5.14 Outdoor High Pressure Protection (H98) Malfunction Decision Conditions: During operation of heating, when pressure 4.0 MPa and above is detected by outdoor high pressure sensor. Malfunction Caused: Faulty water pump. Insufficient water flow rate in system. Water leak in system. 2/3 way closed.
  • Page 86 16.5.15 Indoor Freeze-up Protection (H99) Malfunction Decision Conditions: During anti-freezing control in cooling operation, when the indoor refrigerant liquid temperature < 0°C. Malfunction Caused: Faulty water pump. Insufficient water flow rate in system. Water leak in system. 2 way valve partially closed. Clogged expansion valve or strainer.
  • Page 87 16.5.16 Outdoor High Pressure Switch Activate (F12) Malfunction Decision Conditions: During operation of heating, when pressure 4.5MPa and above is detected by outdoor high pressure switch. Malfunction Caused: Dust accumulation on the outdoor unit heat exchanger. Air short circuit at outdoor unit. Faulty water pump.
  • Page 88 16.5.17 Compressor Rotation Failure (F14) Malfunction Decision Conditions: A compressor rotation failure is detected by checking the compressor running condition through the position detection circuit. Malfunction Caused: Compressor terminal disconnect. Faulty outdoor unit PCB (main). Faulty compressor. Abnormality Judgment: Continue 4 times in 20 minutes.
  • Page 89 16.5.18 Outdoor Fan Motor (DC Motor) Mechanism Locked (F15) Malfunction Decision Conditions: The rotation speed detected by the Hall IC of the fan motor during fan motor operation is used to determine abnormal fan motor (feedback of rotation > 2550rpm or < 50rpm). Malfunction Caused: Operation stop due to short circuit inside the fan motor winding.
  • Page 90 16.5.19 Input Over Current Detection (F16) Malfunction Decision Conditions: During operation of heating, when outdoor current above 27.9A is detected by the current transformer (CT) in the outdoor unit PCB. Malfunction Caused: Excessive refrigerant. Faulty outdoor unit PCB (main). Abnormality Judgment: Continue 3 times in 20 minutes.
  • Page 91 16.5.20 Compressor Overheating (F20) Malfunction Decision Conditions: During operation of heating, when temperature above 112°C is detected by the compressor tank temperature sensor. Malfunction Caused: Faulty compressor tank temperature sensor. 2/3 way valve closed. Refrigerant shortage (refrigerant leakage). Clogged expansion valve or strainer. Faulty outdoor unit PCB (main).
  • Page 92 16.5.21 IPM Overheating (F22) Malfunction Decision Conditions: During operation of heating, when temperature 95°C is detected by the outdoor IPM temperature sensor. Malfunction Caused: Faulty outdoor unit fan motor. Faulty outdoor unit PCB (main). Abnormality Judgment: Continue 3 times in 30 minutes.
  • Page 93 16.5.22 Output Over Current Detection (F23) Malfunction Decision Conditions: During operation of heating, when outdoor DC current is above 40.1 ± 5.0A (for: UD07~09CE) OR 44.7 ± 5.0A (for: UD12~16CE) is detected by the IPM DC Peak sensing circuitry in the outdoor unit PCB (main). Malfunction Caused: Faulty outdoor unit PCB (main).
  • Page 94 16.5.23 Refrigeration Cycle Abnormality (F24) Malfunction Decision Conditions: During operation of heating, compressor frequency > Frated. During operation of heating, running current: 0.65A < I < 1.65A. During operation of heating, indoor refrigerant liquid temperature - water inlet temperature < 5°C. Malfunction Caused: Faulty water inlet or indoor refrigerant liquid temperature sensors.
  • Page 95 16.5.24 Four Way Valve Abnormality (F25) Malfunction Decision Conditions: During heating operation, when the indoor pipe temperature of thermostat ON indoor unit < 0°C. Malfunction Caused: Faulty sensor. Faulty connector connection. Faulty outdoor unit PCB (noise filter/main). Faulty four way valve. Abnormality Judgment: Continue 4 times in 30 minutes.
  • Page 96 16.5.25 Outdoor High Pressure Switch Abnormal (F27) Malfunction Decision Conditions: During compressor stop, and outdoor high pressure switch is remain opened. Malfunction Caused: Faulty connector connection. Faulty switch. Faulty outdoor unit PCB (main). Abnormality Judgment: Continue for 1 minute.
  • Page 97 16.5.26 Outdoor Air Temperature Sensor Abnormality (F36) Malfunction Decision Conditions: During startup and operation of heating, the temperatures detected by the outdoor air temperature sensor are used to determine sensor error. Malfunction Caused: Faulty connector connection. Faulty sensor. Faulty outdoor unit PCB (main). Abnormality Judgment: Continue for 5 seconds.
  • Page 98 16.5.27 Indoor Water Inlet Temperature Sensor Abnormality (F37) Malfunction Decision Conditions: During startup and operation of heating, the temperatures detected by the indoor water inlet temperature sensor are used to determine sensor error. Malfunction Caused: Faulty connector connection. Faulty sensor. Faulty indoor unit PCB (main).
  • Page 99 16.5.28 Outdoor Discharge Pipe Temperature Sensor Abnormality (F40) Malfunction Decision Conditions: During startup and operation of heating, the temperatures detected by the outdoor discharge pipe temperature sensor are used to determine sensor error. Malfunction Caused: Faulty connector connection. Faulty sensor. Faulty outdoor unit PCB (main).
  • Page 100 16.5.29 Power Factor Correction (PFC) Abnormality (F41) Malfunction Decision Conditions: During operation of heating, when the PFC protection circuitry in the outdoor unit PCB (main) senses abnormal high DC voltage level. Malfunction Caused: Power supply surge. Compressor windings not uniform. Faulty outdoor unit PCB (main).
  • Page 101 16.5.30 Outdoor Pipe Temperature Sensor Abnormality (F42) Malfunction Decision Conditions: During startup and operation of heating, the temperatures detected by the outdoor pipe temperature sensor are used to determine sensor error. Malfunction Caused: Faulty connector connection. Faulty sensor. Faulty outdoor unit PCB (main). Abnormality Judgment: Continue for 5 seconds.
  • Page 102 16.5.31 Outdoor Defrost Temperature Sensor Abnormality (F43) Malfunction Decision Conditions: During startup and operation of heating, the temperatures detected by the outdoor defrost temperature sensor are used to determine sensor error. Malfunction Caused: Faulty connector connection. Faulty sensor. Faulty outdoor unit PCB (main). Abnormality Judgment: Continue for 5 seconds.
  • Page 103 16.5.32 Indoor Water Outlet Temperature Sensor Abnormality (F45) Malfunction Decision Conditions: During startup and operation of heating, the temperatures detected by the indoor water outlet temperature sensor are used to determine sensor errors. Malfunction Caused: Faulty connector connection. Faulty sensor. Faulty indoor unit PCB (main).
  • Page 104 16.5.33 Outdoor Current Transformer Open Circuit (F46) Malfunction Decision Conditions: A current transformer (CT) open circuit is detected by checking the compressor running frequency (≥ rated frequency) and CT detected input current (< 0.65A) for continuously 20 seconds. Malfunction Caused: CT defective.
  • Page 105 16.5.34 Cooling High Pressure Overload Protection (F95) Malfunction Decision Conditions: During operation of cooling, when pressure 4.0MPa and above is detected by outdoor high pressure sensor. Malfunction Caused: Dust accumulation in the outdoor unit heat exchanger. Air short circuit at outdoor unit. 2 way valve closed.

  • Page 106: Disassembly And Assembly Instructions

    17. Disassembly and Assembly Instructions WARNING High Voltage are generated in the electrical parts area by the capacitor. Ensure that the capacitor has discharged sufficiently before proceeding with repair work. Failure to heed this caution may result in electric shocks. WARNING Be sure to switch off all the power supply before performing each of the below action.

  • Page 107: To Remove The Cabinet Rear Plate

    17.3 To Remove The Cabinet Rear Plate 17.4 To Remove Pressure Gauge 17.5 To Remove RCCB...

  • Page 108: To Remove Transformer And Electronic Controller Board

    17.6 To Remove Transformer and Electronic Controller Board 17.7 To Remove Pressure Relief Valve and Air Purge Valve When reinstall the water pipe, use grease or water at the joining.

  • Page 109: To Remove Flow Switch

    17.8 To Remove Flow Switch When reinstall the water pipe, use grease or water at the joining. 17.9 To Remove Water Pump When reinstall the water pipe, use grease or water at the joining. 17.10 To Remove Bottle Complete When reinstall the water pipe, use grease or water at the joining.

  • Page 110: Technical Data

    18. Technical Data 18.1 Operation Characteristics 18.1.1 WH-MDF12C6E5 (WH-MDF12C6E5-1) Heating Characteristics at Different Outdoor Air Temperature Condition Outdoor air temperature : 7°C (DBT), 6°C (WBT) Indoor water inlet temperature : 30°C Indoor water outlet temperature : 35°C Piping length : 7m...
  • Page 111 18.1.2 WH-MDF14C6E5 (WH-MDF14C6E5-1) Heating Characteristics at Different Outdoor Air Temperature Condition Outdoor air temperature : 7°C (DBT), 6°C (WBT) Indoor water inlet temperature : 30°C Indoor water outlet temperature : 35°C Piping length : 7m...
  • Page 112 18.1.3 WH-MDF16C6E5 (WH-MDF16C6E5-1) Heating Characteristics at Different Outdoor Air Temperature Condition Outdoor air temperature : 7°C (DBT), 6°C (WBT) Indoor water inlet temperature : 30°C Indoor water outlet temperature : 35°C Piping length : 7m...

  • Page 113: Heating Capacity Table

    18.2 Heating Capacity Table 18.2.1 WH-MDF12C6E5 (WH-MDF12C6E5-1) Water Out Outdoor Input Input Input Input Input Input Capacity Capacity Capacity Capacity Capacity Capacity Power Power Power Power Power Power 9300 3500 8900 3660 8500 3830 8100 3990 7500 4090 7000 4200...

  • Page 114: Exploded View And Replacement Parts List

    19. Exploded View and Replacement Parts List 19.1 WH-MDF12C6E5 WH-MDF14C6E5 WH-MDF16C6E5 (WH-MDF12C6E5-1 WH-MDF14C6E5-1 WH-MDF16C6E5-1) (Refrigerant System)
  • Page 116 Note: The above exploded view is for the purpose of parts disassembly and replacement. The non-numbered parts are not kept as standard service parts.
  • Page 117 < Model: Refrigerant System > REF. WH-MDF12C6E5 WH-MDF14C6E5 WH-MDF16C6E5 DESCRIPTION & NAME QTY. REMARKS (WH-MDF12C6E5-1) (WH-MDF14C6E5-1) (WH-MDF16C6E5-1) BASE PAN ASS’Y CWD52K1276 ← ← COMPRESSOR 5JD420XAA22 ← ← ANTI-VIBRATION BUSHING CWH50055 ← ← NUT FOR COMP. MOUNT. CWH561049 ← ← PACKING CWB811017 ←...
  • Page 118 REF. WH-MDF12C6E5 WH-MDF14C6E5 WH-MDF16C6E5 DESCRIPTION & NAME QTY. REMARKS (WH-MDF12C6E5-1) (WH-MDF14C6E5-1) (WH-MDF16C6E5-1) ACCESSORY CO. (DRAIN ELBOW) CWG87C2030 ← ← CRANKCASE HEATER (BASE PAN) CWA341071 ← ← SOUND PROOF MATERIAL CWG302599 ← ← Note: All parts are supplied from PAPAMY, Malaysia (Vendor Code: 00029488).

  • Page 119: Wh-Mdf12C6E5 Wh-Mdf14C6E5 Wh-Mdf16C6E5

    19.2 WH-MDF12C6E5 WH-MDF14C6E5 WH-MDF16C6E5 (WH-MDF12C6E5-1 WH-MDF14C6E5-1 WH-MDF16C6E5-1) (Water System)
  • Page 120 Note: The above exploded view is for the purpose of parts disassembly and replacement. The non-numbered parts are not kept as standard service parts.
  • Page 121 < Model: Water System > REF. WH-MDF12C6E5 WH-MDF14C6E5 WH-MDF16C6E5 DESCRIPTION & NAME QTY. REMARKS (WH-MDF12C6E5-1) (WH-MDF14C6E5-1) (WH-MDF16C6E5-1) BASE PAN CWD52K1242 ← ← HOT WATER COIL-COMPLETE CWB90C1046 ← ← RECEIVER CWB141039 ← ← FLOAT (FLOW SWITCH) CWB601008 ← ← PUMP CWB532096 ←...

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