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

Monobloc air-to-water heatpump system
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Download this manual See also: Service Manual, 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.
Monobloc Air-to-Water Heatpump System
Monobloc Unit
WH-MDC09C3E8
WH-MDC12C9E8
WH-MDC14C9E8
WH-MDC16C9E8
WARNING
PRECAUTION OF LOW TEMPERATURE
Order No. PHAAM1010088C2
© Panasonic HA Air-Conditioning (M) Sdn. Bhd. 2010.
Unauthorized copying and distribution is a violation of law.

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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 HA Air-Conditioning (M) Sdn. Bhd. 2010. Unauthorized copying and distribution is a violation of law.

  • Page 2: Table Of Contents

    12.1 Basic Function ..........48 19. Exploded View and Replacement Parts 12.2 Water Pump ..........60 List ..............128 12.3 Pump Down Operation ........60 19.1 WH-MDC09C3E8 WH-MDC12C9E8 12.4 Flow Switch..........60 WH-MDC14C9E8 WH-MDC16C9E8 12.5 Force Heater Mode Operation .....61 (Refrigerant System)......... 128 12.6 Monobloc Unit Safety........61 19.2 WH-MDC09C3E8 WH-MDC12C9E8...

  • Page 3: Safety Precautions

    1. Safety Precautions  Read the following “SAFETY PRECAUTIONS” carefully before perform any servicing for Monobloc Air-to-Water Heatpump System (here after referred to as “Monobloc unit”).  Electrical work and water installation works must be installed or serviced by a licensed electrician and licensed water system installer respectively.
  • Page 4  Must follow local national wiring standard, regulation and this installation instruction.  Strongly recommended to make permanent connection to a circuit breaker. For WH-MDC09C3E8: - Power 1: Use approved 20A 4-poles circuit breaker with a minimum contact gap of 3.0mm.

  • Page 5: Specifications

    2. Specifications WH-MDC09C3E8 Item Unit Refrigerant System Performance Test Condition EUROVENT Cooling Capacity 7.00 BTU/h 23900 kcal/h 6020 3.11 kcal/hW 2.68 Heating Capacity 9.00 BTU/h 30700 kcal/h 7740 4.74 kcal/hW 4.07 Air Flow Cooling: 89.5 (3160) /min (ft /min) Heating: 76.8 (2710)
  • Page 6 Item Unit Monobloc Unit Running Current Cooling: 3.4 Heating: 2.9 Back-up Heater: Max. Current/Max. Input Power A/kW Common ELCB to Heat Pump Tank Heater [1 Phase, 230V]: Max. Current/ A/kW 13.0/3.00 Max. Input Power Power Factor Cooling: 96 Heating: 95 Power factor means total figure of compressor and outdoor fan motor.

  • Page 7: Wh-Mdc12C9E8

    WH-MDC12C9E8 Item Unit Refrigerant System Performance Test Condition EUROVENT Cooling Capacity 10.00 BTU/h 34100 kcal/h 8600 2.78 kcal/hW 2.39 Heating Capacity 12.00 BTU/h 40900 kcal/h 10320 4.67 kcal/hW 4.02 Air Flow Cooling: 93.3 (3290) /min (ft /min) Heating: 80.0 (2830) Refrigeration Control Device Expansion Valve Refrigeration Oil...
  • Page 8 Item Unit Monobloc Unit 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 Heating: 96 Power factor means total figure of compressor and outdoor fan motor. Power Cord Number of core Length...

  • Page 9: Wh-Mdc14C9E8

    WH-MDC14C9E8 Item Unit Refrigerant System Performance Test Condition EUROVENT Cooling Capacity 11.50 BTU/h 39200 kcal/h 9890 2.61 kcal/hW 2.25 Heating Capacity 14.00 BTU/h 47800 kcal/h 12040 4.50 kcal/hW 3.87 Air Flow Cooling: 97.8 (3450) /min (ft /min) Heating: 84.0 (2970) Refrigeration Control Device Expansion Valve Refrigeration Oil...
  • Page 10 Item Unit Monobloc Unit 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 Heating: 96 Power factor means total figure of compressor and outdoor fan motor. Power Cord Number of core Length...

  • Page 11: Wh-Mdc16C9E8

    WH-MDC16C9E8 Item Unit Refrigerant System Performance Test Condition EUROVENT Cooling Capacity 12.20 BTU/h 41600 kcal/h 10490 2.54 kcal/hW 2.19 Heating Capacity 16.00 BTU/h 54600 kcal/h 13760 4.23 kcal/hW 3.64 Air Flow Cooling: 97.8 (3450) /min (ft /min) Heating: 90.0 (3180) Refrigeration Control Device Expansion Valve Refrigeration Oil...
  • Page 12 Item Unit Monobloc Unit Starting Current Running Current Cooling: 7.2 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 Heating: 96 Power factor means total figure of compressor and outdoor fan motor. Power Cord Number of core Length...

  • Page 13: 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 14: Location Of Controls And Components

    4. Location of Controls and Components Monobloc Unit...

  • Page 15: Main Components

    4.1.1 Main Components Water Pump: The pump circulates the water in the water circuit. Pressure Gauge: The manomater 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 16: Remote Control

    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 19 4.1.2.2 Weekly Timer Setting...
  • Page 20 4.1.2.3 Setting Up the Special Functions...

  • Page 21: Dimensions

    5. Dimensions Monobloc Unit...

  • Page 22: Refrigeration And Water Cycle Diagram

    6. Refrigeration And Water Cycle Diagram...

  • Page 24: Block Diagram

    7. Block Diagram WH-MDC09C3E8...

  • Page 25: Wh-Mdc12C9E8 Wh-Mdc14C9E8 Wh-Mdc16C9E8

    WH-MDC12C9E8 WH-MDC14C9E8 WH-MDC16C9E8...

  • Page 26: Wiring Connection Diagram

    8. Wiring Connection Diagram WH-MDC09C3E8...

  • Page 28: Wh-Mdc12C9E8 Wh-Mdc14C9E8 Wh-Mdc16C9E8

    WH-MDC12C9E8 WH-MDC14C9E8 WH-MDC16C9E8...

  • Page 30: Electronic Circuit Diagram

    9. Electronic Circuit Diagram WH-MDC09C3E8...

  • Page 32: Wh-Mdc12C9E8 Wh-Mdc14C9E8 Wh-Mdc16C9E8

    WH-MDC12C9E8 WH-MDC14C9E8 WH-MDC16C9E8...

  • Page 34: Printed Circuit Board

    10. Printed Circuit Board 10.1 Water System 10.1.1 Main Printed Circuit Board...
  • Page 35 10.1.2 Solar Printed Circuit Board (Optional)

  • Page 36: Refrigerant System

    10.2 Refrigerant System 10.2.1 Main Printed Circuit Board...
  • Page 37 10.2.2 Noise Filter Printed Circuit Board...

  • Page 38: Installation Instruction Monobloc Unit

    11. Installation Instruction Monobloc Unit Dimension Diagram...
  • Page 39 Main Components...

  • Page 40: Select The Best Location

    11.1 Select the Best Location 11.2 Mono Bloc Unit Installation  Install Mono bloc unit at outdoor only. Mono bloc unit will become heavy when filled with  Avoid location where ambient temperature is water. Therefore, please install the Mono bloc unit on below -20°C.

  • Page 41: Piping Installation

    Make sure to use two spanners to tighten the connection. Further tighten the nuts with torque wrench in specified torque as stated in the table. Nut size (Torque) Model Water WH-MDC09C3E8 WH-MDC12C9E8 RP 1 1/4" [117.6 N•m] WH-MDC14C9E8 WH-MDC16C9E8 ...

  • Page 42: Connect The Cord And Cable To Mono Bloc Unit

     In case of a power supply failure or pump operating failure, drain the system (as suggested in the figure below). When water is idle inside the system, freezing up is very likely to happen which could damage the system. Drainage piping installation ...
  • Page 43 Receiver shall be connected to “Room Thermostat”, refer to “Field Supply Accessories” table for details. Receiver’s cable must be (4 or 3 × min 0.5 mm ), double insulation layer of PVC-sheathed or polychloroprene sheathed cable. (connection refer to Diagram 4.2). Tank OLP’s cable must be (2 ×...
  • Page 44 11.4.1 Wire Stripping And Connecting Requirement Diagram 4.3: External Controller connecting diagram Diagram 4.2: Room Thermostat (Receiver) connecting diagram 11.4.2 Connecting Requirement For WH-MDC09C3E8:  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.
  • Page 45 11.4.3 Wired Remote Controller 4 Installation WARNING 1. Be sure to turn off the main power before installing and connecting the remote controller. Otherwise, it will cause the electrical shock. 2. Use the attached accessories parts and specified parts for installation. Otherwise, it will cause the set to fall, fire or electrical shock. 3.
  • 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 controller lower case to the outlet box with the two accessory screws (3). Make sure that the lower case is fl at against the wall at this time, with no bending.
  • Page 47 B. IF REMOTE CONTROLLER CABLE IS EXPOSED Install the remote controller lower case to the Route the remote controller cable (2) inside the wall with the two accessory screws (4). lower case in accordance with the intended Fasten the screws properly until screw head is feeding-out direction.

  • 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 12.1.4 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 12.1.5 Cool + Tank Mode Operation 12.1.6 Tank Mode Operation Control contents:  3 ways valve direction - 3 ways valve switch and fix to tank side.  Heatpump Thermostat characteristic - Water set temperature = tank set temperature or [55°C] whichever lower. - Heatpump Water Outlet set temperature is set to Maximum (55°C) at tank mode i.
  • Page 51 ii. Case 2 - Heatpump THERMO OFF TEMP: Heatpump THERMO OFF TEMP = 55°C + [+2°C]. Water outlet temperature > Heatpump THERMO OFF TEMP for continuous 3 minutes, heatpump OFF but water pump ON. - Heatpump THERMO ON TEMP: Heatpump THERMO ON TEMP = Water inlet during thermo off time + [-3°C]. Heatpump ON back when water outlet temperature <...
  • Page 52 Solar Priority is Set Solar Priority is Not Set...
  • Page 53 12.1.7 Heat + Tank Mode Operation Setting 1: When Heating priority is set by control panel: 3 ways valve control: 3 ways valve switch and fix to room side. Heatpump operation control: Heatpump operate follow normal operation. Backup Heater control: Backup heater operate follow normal operation.
  • Page 54 Case 2: Heatpump THERMO OFF TEMP: 1. Heatpump THERMO OFF TEMP = 55°C + [+2°C]. 2. Water outlet temperature > Heatpump THERMO OFF TEMP for continuous 90 seconds, switch 3 ways valve to room side. End Tank heat-up interval and start count heating heat-up interval. THERMO ON TEMP: 1.
  • Page 55 Heat + Tank (Heating No Priority) (Solar Priority Set)
  • Page 56 Heat + Tank (Heating No Priority) (Solar Priority Not Set)
  • Page 57 12.1.8 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 58 12.1.8.1 Heating Mode Operation Time Chart Exp: 3 ways valve control: 3 ways valve switch and fix to room side. Heatpump operate follow normal heating operation. Backup heater operate follow normal operation. Solar 3 way valve operates follow solar operation specification. 2 ways valve control: 2 ways valve opens.
  • Page 59 12.1.9 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. ...

  • Page 60: Water Pump

    12.2 Water Pump 12.2.1 Water Pump Control Once the Monobloc 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 Monobloc unit or malfunction, the compressor should be OFF immediately and restart delay after 3 minutes.

  • Page 61: Force Heater Mode Operation

    12.5 Force Heater Mode Operation The backup heater also serves as backup in case of malfunctioning of the Monobloc unit. Make sure the OFF/ON control panel LED is OFF (no operation). Press the Force button to start the force heater mode operation. During force heater mode, all other operations are not allowed.

  • Page 62: 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 63: Tank Booster Heater Control

    12.10 Tank Booster Heater Control 12.10.1 Tank Booster Heater Control Heating operation condition: Booster heater Turn On condition: After BOOSTER HEATER DELAY TIMER fulfil 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).

  • Page 64: Solar Operation (Optional)

    12.14 Solar Operation (Optional) 12.14.1 Solar Operation Control according to preset whether solar priority is set or not. When tank connection is NOT set at SETTING mode, solar operation is disabled. When Pump A (from solar pump station) is detected On through connection Y3 and Y4, then the Solar pump 3 Way Valve is requested ON (Refer to figure below).
  • Page 65 Heat + Tank Mode (Heating Priority Not Set) (Solar Priority Set) (Solar Priority Not Set)
  • Page 66 Heat + Tank Mode (Heating Priority Set) Tank Mode (Solar Priority Set) (Solar Priority Not Set)

  • Page 67: External Room Thermostat Control (Optional)

    12.15 External Room Thermostat Control (Optional) Purpose:  Better room temperature control to fulfil 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 68: Two Ways Valve Control

    12.16 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 69: 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 70 13.1.6 Low Frequency Protection Control 1  When the compressor continuously operates at frequency lower than 25 Hz for 240 minutes, the operation frequency will change to 24 Hz for 2 minutes. 13.1.7 Low Frequency Protection Control 2  When all the below conditions comply, the minimum compressor frequency will change to lower frequency. Temperature, T, for: Heating Cooling...

  • Page 71: Protection Control For Heating Operation

    13.2 Protection Control for Heating Operation 13.2.1 Outdoor Air Temperature Control The maximum current value is regulated when the outdoor air temperature rises above 14°C in order to avoid compressor overloading. 13.2.2 Deice Operation When Monobloc unit (Refrigerant System) pipe temperature and outdoor air temperature is low, deice operation start where Monobloc unit fan motor stop.

  • Page 72: Servicing Mode

    14. Servicing Mode 14.1 Test Run Fill up the boiler tank with water. For details refer to boiler tanks 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 73: Maintenance Guide

    15. Maintenance Guide In order to ensure optimal performance of the unit, checks and inspections on the unit and the field wiring must be carried out regularly. Please request a licensed technician for carry out maintenance job. Before carried out any maintenance or repair work, and removing the front plate of heat exchanger unit, always switch off all power supply (i.e.
  • Page 74 How to release the trapped air in water circuit Turn up the lever to become horizontal. (Refer to figure “Pressure relief valve”). The trapped air will be drained out together with water. After few seconds, turn down the lever to stop the water drainage. Repeat it until the bubbling sound disappear.

  • Page 75: 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 76: Relationship Between The Condition Of The Monobloc Unit And Pressure And Electric Current

    16.2 Relationship between the Condition of the Monobloc 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 Monobloc unit during operation during operation Water leakage or insufficient water flow rate in the system Excessive amount of...

  • Page 77: 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. ...

  • Page 78: 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 ...
  • Page 79 Diagnosis display Abnormality/Protection control Abnormality judgement Primary location to verify  Voltage at PFC PFC control 4 times occurrence within 10 minutes 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.

  • Page 80: 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 81 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 82 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 83: Compressor Low Pressure Protection (H)

    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 84 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 85 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 86 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 87 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 88 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 89 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 90 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 91 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 92 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 93 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 94 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 95 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 96 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 97 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 98 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 99 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 100 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 101 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 102 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 103 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 104 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 105 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 106 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 107 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 108 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 109 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 110 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 111 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 112 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 113: 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 114: 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 115: To Remove Transformer And Electronic Controller Board

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

  • Page 116: 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 117: To Remove Bottle Complete

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

  • Page 118: Technical Data

    18. Technical Data 18.1 Operation Characteristics 18.1.1 WH-MDC09C3E8 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 119 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 120 18.1.2 WH-MDC12C9E8 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 121 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 122 18.1.3 WH-MDC14C9E8 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 18.1.4 WH-MDC16C9E8 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: Heating Capacity Table

    18.2 Heating Capacity Table 18.2.1 WH-MDC09C3E8 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 3.53...

  • Page 127: Cooling Capacity Table

    18.3 Cooling Capacity Table MODELS WH-MDC09 WH-MDC12 WH-MDC14 WH-MDC16 Tamb 5.90 1.01 7.65 1.30 8.85 1.50 9.62 1.63 7.45 1.59 9.20 2.30 10.00 2.68 10.51 2.85 7.00 2.25 10.00 3.60 11.50 4.40 12.20 4.80 5.80 2.59 7.60 3.95 9.05 5.01 10.08 5.47 TC: Cooling Capacity (kW)

  • Page 128: Exploded View And Replacement Parts List

    19. Exploded View and Replacement Parts List 19.1 WH-MDC09C3E8 WH-MDC12C9E8 WH-MDC14C9E8 WH-MDC16C9E8 (Refrigerant System)
  • Page 130 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 131 < Model: Refrigerant System> REF. DESCRIPTION & NAME QTY. WH-MDC09C3E8 WH-MDC12C9E8 WH-MDC14C9E8 WH-MDC16C9E8 REMARKS CWD52K1251 ← ← ← BASE PAN ASS’Y 5JD420XBA22 ← ← ← COMPRESSOR BUSHING - COMPRESSOR CWH50055 ← ← ← MOUNT CWH561049 ← ← ← NUT-COMPRESSOR MOUNT CWB811017 ←...
  • Page 132 REF. DESCRIPTION & NAME QTY. WH-MDC09C3E8 WH-MDC12C9E8 WH-MDC14C9E8 WH-MDC16C9E8 REMARKS CWB141055 ← ← ← RECEIVER G0C153J00009 ← ← ← REACTOR CWG87C2030 ← ← ← ACCESSORY CO.(DRAIN ELBOW) DADDG1010000 ← ← ← PTC THERMISTOR Note:  All parts are supplied from PHAAM, Malaysia (Vendor Code: 00029488).

  • Page 133: Wh-Mdc09C3E8 Wh-Mdc12C9E8 Wh-Mdc14C9E8 Wh-Mdc16C9E8 (Water System)

    19.2 WH-MDC09C3E8 WH-MDC12C9E8 WH-MDC14C9E8 WH-MDC16C9E8 (Water 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: Water System> REF. NO. DESCRIPTION & NAME QTY. WH-MDC09C3E8 WH-MDC12C9E8 WH-MDC14C9E8 WH-MDC16C9E8 REMARKS ← ← ← BASE PAN ASS’Y CWD52K1242 ← ← ← HOT WATER COIL-COMPLETE CWB90C1046 ← ← ← RECEIVER CWB141039 ← ← ← FLOAT (FLOW SWITCH) CWB601008 ←...

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