Panasonic WH-MDC09C3E8 Service Manual
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Panasonic WH-MDC09C3E8 Service Manual

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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) Air-to-Water Heatpump System
Mono bloc Unit
WH-MDC09C3E8
WH-MDC12C9E8
WH-MDC14C9E8
WH-MDC16C9E8
(WH-MDC09C3E8-1)
(
WH-MDC12C9E8-1)
(
WH-MDC14C9E8-1)
(
WH-MDC16C9E8-1)
WARNING
PRECAUTION OF LOW TEMPERATURE
© Panasonic Appliances Air-Conditioning (M) Sdn. Bhd. 2012.
Unauthorized copying and distribution is a violation of law.
Order No. PAPAMY1205142CE

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Summary of Contents for Panasonic WH-MDC09C3E8

  • 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

    12.10 Tank Booster Heater Control ...... 64 2. Specifications .............6 12.11 Base Pan Heater Control (Optional) ... 65 12.12 Three Way Valve Control......66 WH-MDC09C3E8 (WH-MDC09C3E8-1) ..6 12.13 Sterilization Mode ........66 WH-MDC12C9E8 (WH-MDC12C9E8-1) ..8 12.14 Quiet Operation........... 66 WH-MDC14C9E8 (WH-MDC14C9E8-1) ..10 12.15 Anti Freeze Control ........
  • Page 3 WH-MDC14C9E8-1 WH-MDC16C9E8-1) (Refrigerant System)........132 19.2 WH-MDC09C3E8 WH-MDC12C9E8 WH-MDC14C9E8 WH-MDC16C9E8 (WH-MDC09C3E8-1 WH-MDC12C9E8-1 WH-MDC14C9E8-1 WH-MDC16C9E8-1) (Water System)..........137...

  • Page 4: 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 5 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 6: Specifications

    2. Specifications WH-MDC09C3E8 (WH-MDC09C3E8-1) Item Unit Refrigerant System Performance Test Condition EN 14511 Condition (Ambient/Water) A35W7 Cooling Capacity 7.00 BTU/h 23900 kcal/h 6020 3.11 kcal/hW 2.68 Condition (Ambient/Water) A7W35 A2W35 Heating Capacity 9.00 9.00 BTU/h 30700 30700 kcal/h 7740 7740 4.74...
  • Page 7 Item Unit Mono Bloc Unit Max. Current/Max. Input Power Heatpump Unit A/kW 7.5 (11.8)/4.94(7.94) (Heatpump unit + Back-up heater) Starting Current Running Current Cooling: 3.4 Cooling: - Heating: 2.9 Heating: 3.9 Back-up Heater: Max. Current/Max. Input Power A/kW Common ELCB to Heat Pump Tank Heater [1 Phase, 230V]: Max.

  • Page 8: Wh-Mdc12C9E8 (Wh-Mdc12C9E8-1)

    WH-MDC12C9E8 (WH-MDC12C9E8-1) Item Unit Refrigerant System Performance Test Condition EN 14511 Condition (Ambient/Water) A35W7 Cooling Capacity 10.00 BTU/h 34100 kcal/h 8600 2.78 kcal/hW 2.39 Condition (Ambient/Water) A7W35 A2W35 Heating Capacity 12.00 11.40 BTU/h 40900 38900 kcal/h 10320 9800 4.67 3.41 kcal/hW 4.02 2.94...
  • Page 9 Item Unit Mono Bloc Unit Running Current Cooling: 5.3 Cooling: - Heating: 3.9 Heating: 5.1 Back-up Heater: Max. Current/Max. Input Power A/kW 13.0/9.00 Tank Heater [1 Phase, 230V]: Max. Current/ A/kW 13.0/3.00 Max. Input Power Power Factor Cooling: 97 Cooling: - Heating: 96 Heating: 95 Power factor means total figure of compressor and outdoor fan motor.

  • Page 10: Wh-Mdc14C9E8 (Wh-Mdc14C9E8-1)

    WH-MDC14C9E8 (WH-MDC14C9E8-1) Item Unit Refrigerant System Performance Test Condition EN 14511 Condition (Ambient/Water) A35W7 Cooling Capacity 11.50 BTU/h 39200 kcal/h 9890 2.61 kcal/hW 2.25 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...
  • Page 11 Item Unit Mono Bloc Unit Running Current Cooling: 6.6 Cooling: - Heating: 4.7 Heating: 5.7 Back-up Heater: Max. Current/Max. Input Power A/kW 13.0/9.00 Tank Heater [1 Phase, 230V]: Max. Current/ A/kW 13.0/3.00 Max. Input Power Power Factor Cooling: 97 Cooling: - Heating: 96 Heating: 95 Power factor means total figure of compressor and outdoor fan motor.

  • Page 12: Wh-Mdc16C9E8 (Wh-Mdc16C9E8-1)

    WH-MDC16C9E8 (WH-MDC16C9E8-1) Item Unit Refrigerant System Performance Test Condition EN 14511 Condition (Ambient/Water) A35W7 Cooling Capacity 12.20 BTU/h 41600 kcal/h 10490 2.54 kcal/hW 2.19 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...
  • Page 13 Item Unit Mono Bloc Unit Starting Current Running Current Cooling: 7.2 Cooling: - Heating: 5.7 Heating: 6.1 Back-up Heater: Max. Current/Max. Input Power A/kW 13.0/9.00 Tank Heater [1 Phase, 230V]: Max. Current/ A/kW 13.0/3.00 Max. Input Power Power Factor Cooling: 97 Cooling: - Heating: 96 Heating: 95...

  • Page 14: 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 15: Location Of Controls And Components

    4. Location of Controls and Components Mono Bloc Unit...

  • Page 16: Main Components

    4.1.1 Main Components Water Pump: The pump circulates the water in the water circuit. Pressure Gauge: The manometer allows read out of the water pressure in the water circuit. Flow Switch: The flow switch checks the flow in the water circuit and protects the heat exchanger against high pressure built-up and the pump against damage.
  • Page 17 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 20 4.1.2.2 Weekly Timer Setting...
  • Page 21 4.1.2.3 Setting Up the Special Functions...

  • Page 22: Dimensions

    5. Dimensions Mono Bloc Unit...

  • Page 23: Refrigeration And Water Cycle Diagram

    6. Refrigeration And Water Cycle Diagram...

  • Page 25: Block Diagram

    7. Block Diagram WH-MDC09C3E8 (WH-MDC09C3E8-1)

  • Page 26: Wh-Mdc12C9E8 Wh-Mdc14C9E8 Wh-Mdc16C9E8 (Wh-Mdc12C9E8-1 Wh-Mdc14C9E8-1 Wh-Mdc16C9E8-1)

    WH-MDC12C9E8 WH-MDC14C9E8 WH-MDC16C9E8 (WH-MDC12C9E8-1 WH-MDC14C9E8-1 WH-MDC16C9E8-1)

  • Page 27: Wiring Connection Diagram

    8. Wiring Connection Diagram WH-MDC09C3E8 (WH-MDC09C3E8-1)

  • Page 29: Wh-Mdc12C9E8 Wh-Mdc14C9E8 Wh-Mdc16C9E8 (Wh-Mdc12C9E8-1 Wh-Mdc14C9E8-1 Wh-Mdc16C9E8-1)

    WH-MDC12C9E8 WH-MDC14C9E8 WH-MDC16C9E8 (WH-MDC12C9E8-1 WH-MDC14C9E8-1 WH-MDC16C9E8-1)

  • Page 31: Electronic Circuit Diagram

    9. Electronic Circuit Diagram WH-MDC09C3E8 (WH-MDC09C3E8-1)

  • Page 33: Wh-Mdc12C9E8 Wh-Mdc14C9E8 Wh-Mdc16C9E8 (Wh-Mdc12C9E8-1 Wh-Mdc14C9E8-1 Wh-Mdc16C9E8-1)

    WH-MDC12C9E8 WH-MDC14C9E8 WH-MDC16C9E8 (WH-MDC12C9E8-1 WH-MDC14C9E8-1 WH-MDC16C9E8-1)

  • Page 35: Printed Circuit Board

    10. Printed Circuit Board 10.1 Water System 10.1.1 Main Printed Circuit Board...
  • Page 36 10.1.2 Solar Printed Circuit Board (Optional)

  • Page 37: Refrigerant System

    10.2 Refrigerant System 10.2.1 Main Printed Circuit Board...
  • Page 38 10.2.2 Noise Filter Printed Circuit Board...

  • Page 39: Installation Instruction Mono Bloc Unit

    11. Installation Instruction Mono Bloc Unit Dimension Diagram...
  • Page 40 Main Components...

  • Page 41: 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 42: 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 43: 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 (Disconnecting means). Isolating device (Disconnecting means) should have minimum 3.0 mm contact gap. Connect the approved polychloroprene sheathed power supply 1 cord (5 x min 1.5 mm ) and power supply 2 cord (3 x min 1.5 mm...
  • Page 44 Connecting with external device (optional) 1. All connections shall follow to the local national wiring standard. 2. It is strongly recommended to use manufacturer-recommended parts and accessories for installation. 3. 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 45 11.4.1 Wire Stripping And Connecting Requirement 11.4.2 Connecting Requirement The equipment’s power supply 1 complies with IEC/EN 61000-3-2. The equipment’s power supply 2 complies with IEC/EN 61000-3-2. For power supply 3: (Only applicable for model 12kW, 14kW and 16kW) The equipment’s power supply 3 complies with IEC/EN 61000-3-2. The equipment’s power supply 3 shall be connected to a suitable supply network, with the following maximum permissible system impedance Z = 0.449 Ω...
  • Page 46 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. Secure the remote control lower case to the outlet box with the two accessory screws (3).
  • Page 47 B. If Remote Control Cable Is Exposed Route the remote control cable (2) inside the Install the remote control lower case to the lower case in accordance with the intended wall with the two accessory screws (4). feeding-out direction. (Refer to the illustration Fasten the screws properly until screw head is at below) lower than the rib and reach the base of...

  • Page 48: 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 49 12.1.3 Cool Mode Operation 3 ways valve control: 3 ways valve switch and fix to room side. Heatpump operate follow normal cooling operation. Backup heater DOES NOT operate during cool mode. Solar 3 way valve operates follow solar operation specification. 2 ways valve control: 2 ways valve is closed.
  • Page 50 12.1.4 Cool + Tank Mode Operation 12.1.5 Tank Mode Operation Control contents: 3 ways valve direction - 3 ways valve switch and fix to tank side. Heat pump Thermostat characteristic - Water set temperature = Tank set temperature or [50°C] whichever lower. - Heat pump Water Outlet set temperature is set to Maximum (53°C) at tank mode.
  • Page 51 iii. Case 3 - Heat pump THERMO OFF TEMP: Water inlet temperature > 55°C for continuous 60 secs, heat pump OFF. - Heat pump THERMO ON TEMP: Heat pump THERMO ON TEMP = Water inlet temperature < 55°C. Booster heater control - Booster heater turn On and Off follow normal operation.
  • Page 53 12.1.6 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 54 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 55 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 56 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 57 - 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 60 12.1.7 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 61 12.1.8 Water Temperature Thermo Shift Setting Switchs are ignored during “PUMPDW” = ON. Switchs are ignored during “STATUS” = ON. ▲ ▼ “ ”, “ ”, “SELECT” switch are ignored if “SETTING” = OFF. “CANCEL” switch is ignored if “SETTING” = OFF & “STATUS” = OFF. If “SET”...

  • Page 62: Water Pump

    12.2 Water Pump 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 63: Flow Switch

    12.4 Flow Switch 12.4.1 Flow Switch Control The water flow switch serve as an overload protector that shuts down the unit when the water level is detected to be low. Detection is Lo (0V) when there is no water flow, and detection is Hi (5V) when there is water flow. 12.5 Force Heater Mode Operation The backup heater also serves as backup in case of malfunctioning of the Mono bloc unit.

  • Page 64: Indication Panel

    12.8 Indication Panel Operation Color Green Light ON Operation ON Light OFF Operation OFF Note: If Operation LED is blinking, there is an abnormality operation occurs. 12.9 Back-Up Heater Control 12.9.1 Electric Heater Control Normal Heating Mode Heater On condition: a.

  • Page 65: Base Pan Heater Control (Optional)

    Booster heater Turn On condition: After BOOSTER HEATER DELAY TIMER fulfill during heatpump startup time in tank mode, or during switching from heating heat-up interval to tank heat-up interval in heat + tank mode (heating priority not set). Tank temperature < Tank set temperature + [-5°C], 20 minutes since previous heater off.

  • Page 66: Three Way Valve Control

    12.12 Three Way Valve Control Purpose: - 3 ways valve is used to change flow direction of hot water from heatpump between heating side and tank side Control contents: 3 ways valve switch Off: During 3 ways valve switch Off time, the hot water will provide heat capacity to heating side. 3 ways valve switch On: During 3 ways valve switch On time, the hot water will provide heat capacity to tank side.

  • Page 67: Solar Operation (Optional)

    Water pump turns OFF when ANY of the below conditions is fulfilled: Outdoor ambient temp. ≥ 4°C During -5°C < outdoor ambient temp. < 4°C After water pump ON for 4 minutes, and water inlet/outlet temp. ≥ 8°C Else, shift to backup heater anti freeze control During outdoor ambient temp.
  • Page 68 When solar priority is NOT SET Operation condition: Solar pump operates if all of the following conditions are fulfilled: Power On. (regardless operation ON or OFF). There is operation request from solar pump station. iii) Tank hot water temp is below solar on upper limit temp [EEPROM 1 : 70]°C. iv) Heatpump thermo OFF in tank mode OR Heatpump operate to room side (during operation ON and tank mode selected).
  • Page 69 Heat + Tank Mode (Heating Priority Set) Tank Mode (Solar Priority Set) (Solar Priority Not Set)

  • Page 70: 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 71: Two Ways Valve Control

    12.18 Two ways valve control Functionality of 2 ways valve: Use to allow hot water to floor heating panel or block cold water to floor heating panel. Control contents: When indoor running in heat mode, OPEN the 2 ways valve. When indoor running in cool mode, CLOSE the 2 ways valve.

  • Page 72: 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 73: 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 74: 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 75: Protection Control For Cooling Operation

    13.3 Protection Control for Cooling Operation 13.3.1 Outdoor Air Temperature Control The Compressor operating frequency is regulated in accordance to the outdoor air temperature as shown in the diagram below. This control will begin 1 minute after the compressor starts. Compressor frequency will adjust base on outdoor air Temperature.

  • Page 76: 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 77: 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 78 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 79: 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. The normal pressure of the refrigeration cycle depends on various conditions, the standard values for them are shown in the table on the right.

  • Page 80: 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 Cooling Mode Condition of the Low Pressure High Pressure Electric current Low Pressure High Pressure Electric current Mono Bloc unit during operation during operation Water leakage or insufficient water flow rate in the system...

  • Page 81: 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 82: 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 83 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 84: Self-Diagnosis Method

    16.5 Self-diagnosis Method 16.5.1 Connection Capability Rank Abnormality (H12) Malfunction Decision Conditions: During startup operation of cooling and 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.
  • Page 85 16.5.2 Compressor Tank Temperature Sensor Abnormality (H15) Malfunction Decision Conditions: During startup and operation of cooling and 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).
  • Page 86 16.5.3 Indoor Refrigerant Liquid Temperature Sensor Abnormality (H23) Malfunction Decision Conditions: During startup and operation of cooling and heating, the temperatures detected by the indoor refrigerant liquid temperature sensor are used to determine sensor error. Malfunction Caused: Faulty connector connection. Faulty sensor.
  • Page 87 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 88 16.5.5 Water Flow Switch Abnormality (H62) Malfunction Decision Conditions: During operation of cooling and 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.
  • Page 89 16.5.6 Outdoor High Pressure Abnormality (H64) Malfunction Decision Conditions: During operation of cooling and 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 90 16.5.7 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 91 16.5.8 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 92 16.5.9 Indoor-Remote Control Communication Abnormality (H76) Malfunction Decision Conditions: During standby and operation of cooling and heating, indoor-remote control error occur. Malfunction Caused: Faulty connector connection. Faulty remote control. Faulty indoor unit PCB (main).
  • Page 93 16.5.10 Indoor/Outdoor Abnormal Communication (H90) Malfunction Decision Conditions: During operation of cooling and 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 94 16.5.11 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 95 16.5.12 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 96 16.5.13 Outdoor High Pressure Protection (H98) Malfunction Decision Conditions: During operation of heating, when pressure 4.0MPa 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 97 16.5.14 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 98 16.5.15 Outdoor High Pressure Switch Activate (F12) Malfunction Decision Conditions: During operation of cooling and 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 99 16.5.16 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 100 16.5.17 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 101 16.5.18 Input Over Current Detection (F16) Malfunction Decision Conditions: During operation of cooling and heating, when outdoor current above 10.6A 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 102 16.5.19 Compressor Overheating (F20) Malfunction Decision Conditions: During operation of cooling and 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.
  • Page 103 16.5.20 IPM Overheating (F22) Malfunction Decision Conditions: During operation of cooling and 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 104 16.5.21 Output Over Current Detection (F23) Malfunction Decision Conditions: During operation of cooling and 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 105 16.5.22 Refrigeration Cycle Abnormality (F24) Malfunction Decision Conditions: During operation of cooling and heating, compressor frequency > Frated. During operation of cooling and heating, running current: 0.65A < I < 1.65A. During operation of cooling, water inlet temperature - indoor refrigerant liquid temperature < 5°C. During operation of heating, indoor refrigerant liquid temperature - water inlet temperature <...
  • Page 106 16.5.23 Four Way Valve Abnormality (F25) Malfunction Decision Conditions: During heating operation, when the indoor pipe temperature of thermostat ON indoor unit < 0°C. During cooling operation, when the indoor pipe temperature of thermostat ON indoor unit > 45°C. Malfunction Caused: Faulty sensor.
  • Page 107 16.5.24 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 108 16.5.25 Outdoor Air Temperature Sensor Abnormality (F36) Malfunction Decision Conditions: During startup and operation of cooling and 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).
  • Page 109 16.5.26 Indoor Water Inlet Temperature Sensor Abnormality (F37) Malfunction Decision Conditions: During startup and operation of cooling and heating, the temperatures detected by the indoor water inlet temperature sensor are used to determine sensor error. Malfunction Caused: Faulty connector connection. Faulty sensor.
  • Page 110 16.5.27 Outdoor Discharge Pipe Temperature Sensor Abnormality (F40) Malfunction Decision Conditions: During startup and operation of cooling and heating, the temperatures detected by the outdoor discharge pipe temperature sensor are used to determine sensor error. Malfunction Caused: Faulty connector connection. Faulty sensor.
  • Page 111 16.5.28 Power Factor Correction (PFC) Abnormality (F41) Malfunction Decision Conditions: During operation of cooling and 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 112 16.5.29 Outdoor Pipe Temperature Sensor Abnormality (F42) Malfunction Decision Conditions: During startup and operation of cooling and 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).
  • Page 113 16.5.30 Outdoor Defrost Temperature Sensor Abnormality (F43) Malfunction Decision Conditions: During startup and operation of cooling and 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).
  • Page 114 16.5.31 Indoor Water Outlet Temperature Sensor Abnormality (F45) Malfunction Decision Conditions: During startup and operation of cooling and heating, the temperatures detected by the indoor water outlet temperature sensor are used to determine sensor errors. Malfunction Caused: Faulty connector connection. Faulty sensor.
  • Page 115 16.5.32 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 116 16.5.33 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 117: 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 118: 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 119: 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 120: 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.

  • Page 121: To Remove Bottle Complete

    17.10 To Remove Bottle Complete When reinstall the water pipe, use grease or water at the joining.

  • Page 122: Technical Data

    18. Technical Data 18.1 Operation Characteristics 18.1.1 WH-MDC09C3E8 (WH-MDC09C3E8-1) 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...
  • Page 123 Cooling Characteristics at Different Outdoor Air Temperature Condition Outdoor air temperature : 35°C (DBT), -°C (WBT) Indoor water inlet temperature : 12°C Indoor water outlet temperature : 7°C...
  • Page 124 18.1.2 WH-MDC12C9E8 (WH-MDC12C9E8-1) 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...
  • Page 125 Cooling Characteristics at Different Outdoor Air Temperature Condition Outdoor air temperature : 35°C (DBT), -°C (WBT) Indoor water inlet temperature : 12°C Indoor water outlet temperature : 7°C...
  • Page 126 18.1.3 WH-MDC14C9E8 (WH-MDC14C9E8-1) 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...
  • Page 127 Cooling Characteristics at Different Outdoor Air Temperature Condition Outdoor air temperature : 35°C (DBT), -°C (WBT) Indoor water inlet temperature : 12°C Indoor water outlet temperature : 7°C...
  • Page 128 18.1.4 WH-MDC16C9E8 (WH-MDC16C9E8-1) 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...
  • Page 129 Cooling Characteristics at Different Outdoor Air Temperature Condition Outdoor air temperature : 35°C (DBT), -°C (WBT) Indoor water inlet temperature : 12°C Indoor water outlet temperature : 7°C...

  • Page 130: Heating Capacity Table

    18.2 Heating Capacity Table 18.2.1 WH-MDC09C3E8 (WH-MDC09C3E8-1) Tamb 8.65 3.10 8.30 3.25 7.95 3.45 7.60 3.65 7.15 3.75 6.70 3.85 9.35 2.95 9.00 3.20 8.85 3.50 8.70 3.80 8.30 3.85 7.90 3.90 9.31 2.39 9.00 2.55 9.00 2.82 9.00 3.09 8.90...

  • Page 131: Cooling Capacity Table

    18.3 Cooling Capacity Table 18.3.1 WH-MDC09C3E8 (WH-MDC09C3E8-1) Water In Water Out °C 5.90 1.01 7.20 1.10 8.31 1.05 7.45 1.59 11.80 1.92 12.10 1.88 7.00 2.25 8.28 2.29 9.00 2.30 5.80 2.59 7.80 2.75 8.80 2.75 18.3.2 WH-MDC12C9E8 (WH-MDC12C9E8-1) Water In Water Out °C...

  • Page 132: Exploded View And Replacement Parts List

    19. Exploded View and Replacement Parts List 19.1 WH-MDC09C3E8 WH-MDC12C9E8 WH-MDC14C9E8 WH-MDC16C9E8 (WH-MDC09C3E8-1 WH-MDC12C9E8-1 WH-MDC14C9E8-1 WH-MDC16C9E8-1) (Refrigerant System)
  • Page 134 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 135 < Model: Refrigerant System> WH-MDC09C3E8 WH-MDC12C9E8 WH-MDC14C9E8 WH-MDC16C9E8 REF. DESCRIPTION & NAME QTY. (WH- (WH- (WH- (WH- REMARKS MDC09C3E8-1) MDC12C9E8-1) MDC14C9E8-1) MDC16C9E8-1) BASE PAN ASS’Y CWD52K1276 ← ← ← COMPRESSOR 5JD420XBA22 ← ← ← BUSHING - COMPRESSOR CWH50055 ← ←...
  • Page 136 WH-MDC09C3E8 WH-MDC12C9E8 WH-MDC14C9E8 WH-MDC16C9E8 REF. DESCRIPTION & NAME QTY. (WH- (WH- (WH- (WH- REMARKS MDC09C3E8-1) MDC12C9E8-1) MDC14C9E8-1) MDC16C9E8-1) REACTOR G0C153J00009 ← ← ← ACCESSORY CO.(DRAIN ELBOW) CWG87C2030 ← ← ← PTC THERMISTOR D4DDG1010001 ← ← ← CWG302599 ← ← ←...
  • Page 137 19.2 WH-MDC09C3E8 WH-MDC12C9E8 WH-MDC14C9E8 WH-MDC16C9E8 (WH-MDC09C3E8-1 WH-MDC12C9E8-1 WH-MDC14C9E8-1 WH-MDC16C9E8-1) (Water System)
  • Page 138 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 139 < Model: Water System> WH-MDC09C3E8 WH-MDC12C9E8 WH-MDC14C9E8 WH-MDC16C9E8 REF. NO. DESCRIPTION & NAME QTY. (WH- (WH- (WH- (WH- REMARKS MDC09C3E8-1) MDC12C9E8-1) MDC14C9E8-1) MDC16C9E8-1) BASE PAN ASS’Y CWD52K1242 ← ← ← HOT WATER COIL-COMPLETE CWB90C1046 ← ← ← RECEIVER CWB141039 ←...

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