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Panasonic WH-SDC03E3E5 Service Manual
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Panasonic WH-SDC03E3E5 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 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.
Indoor Unit
WH-SDC03E3E5
WH-SDC05E3E5
WARNING
PRECAUTION OF LOW TEMPERATURE
Order No: PAPAMY1209153CE
Outdoor Unit
WH-UD03EE5
WH-UD05EE5
© Panasonic Appliances Air-Conditioning Malaysia
Sdn. Bhd. 2012. Unauthorized copying and distribution
is a violation of law.

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Summary of Contents for Panasonic WH-SDC03E3E5

  • 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 Malaysia Sdn. Bhd. 2012. Unauthorized copying and distribution is a violation of law.

  • Page 2: Table Of Contents

    14. Servicing Mode ..........67 14.1 How to Take Out Front Plate ...... 67 2. Specifications .............5 14.2 How to Take Out Side Cabinet ....67 WH-SDC03E3E5 WH-UD03EE5 ....5 14.3 Test Run ............. 67 WH-SDC05E3E5 WH-UD05EE5 ....8 14.4 Proper Pump Down Procedure....67 14.5 How to Adjust Water Flow Rate....

  • Page 3: Safety Precautions

    1. Safety Precautions Read the following “SAFETY PRECAUTIONS” carefully before perform any servicing. Electrical work must be installed or serviced by a licensed electrician. 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. The meaning of each indication used is as below.
  • Page 4 WARNING 19. The unit is only for use in a closed portable water system. Utilization in an open water circuit or non-portable water circuit, may lead to excessive corrosion of the water piping and risk of incubating bacteria colonies, particularly Legionella, in water. 20.

  • Page 5: Specifications

    2. Specifications WH-SDC03E3E5 WH-UD03EE5 Item Unit Outdoor Unit Performance Test Condition EN 14511 Cooling Capacity Condition A35W7 (Ambient/Water) 3.20 BTU/h 10900 kcal/h 2750 Cooling EER 3.08 kcal/hW 2.64 Heating Capacity Condition A7W35 A2W35 (Ambient/Water) 3.20 3.20 BTU/h 10900 10900 kcal/h...
  • Page 6 Item Unit Power Source (Phase, Voltage, Cycle) ø Single Input Power Condition A35W7 A7W35 A2W35 (Ambient/Water) Cooling: 1.04 Heating: 0.64 Heating: 0.90 Maximum Input Power For Heatpump System 2.35 Power Supply 1 : Phase (Ø) / Max. Current (A) / Max. Input Power (W) 1Ø...
  • Page 7 Item Unit Indoor Unit Expansion Vessel Volume Capacity of Integrated Electric Heater 3.00 Note: Cooling capacities are based on outdoor air temperature of 35°C Dry Bulb with controlled indoor water inlet temperature of 12°C and water outlet temperature of 7°C. Heating capacities are based on outdoor air temperature of 7°C Dry Bulb (44.6°F Dry Bulb), 6°C Wet Bulb (42.8°F Wet Bulb) with controlled indoor water inlet temperature of 30°C and water outlet temperature of 35°C.

  • Page 8: Wh-Sdc05E3E5 Wh-Ud05Ee5

    WH-SDC05E3E5 WH-UD05EE5 Item Unit Outdoor Unit Performance Test Condition EN 14511 Cooling Capacity Condition A35W7 (Ambient/Water) 4.50 BTU/h 15300 kcal/h 3870 Cooling EER 2.69 kcal/hW 2.32 Heating Capacity Condition A7W35 A2W35 (Ambient/Water) 5.00 4.20 BTU/h 17100 14300 kcal/h 4300 3610 Heating COP 4.63 3.11...
  • Page 9 Item Unit Power Source (Phase, Voltage, Cycle) ø Single Input Power Condition A35W7 A7W35 A2W35 (Ambient/Water) Cooling: 1.67 Heating: 1.08 Heating: 1.35 Maximum Input Power For Heatpump System 2.59 Power Supply 1 : Phase (Ø) / Max. Current (A) / Max. Input Power (W) 1Ø...
  • Page 10 Item Unit Indoor Unit Protection Device Residual Current Circuit Breaker (40) Expansion Vessel Volume Capacity of Integrated Electric Heater 3.00 Note: Cooling capacities are based on outdoor air temperature of 35°C Dry Bulb with controlled indoor water inlet temperature of 12°C and water outlet temperature of 7°C. Heating capacities are based on outdoor air temperature of 7°C Dry Bulb (44.6°F Dry Bulb), 6°C Wet Bulb (42.8°F Wet Bulb) with controlled indoor water inlet temperature of 30°C and water outlet temperature of 35°C.

  • Page 11: Features

    3. Features Inverter Technology - Energy saving High Efficiency Compact Design Environment Protection - Non-ozone depletion substances refrigerant (R410A) Long Installation Piping - Long piping up to 15 meter with height difference 5 meter - Flexible 4-way piping for outdoor unit Easy to use control panel Weekly Timer setting Quality Improvement...

  • Page 12: Location Of Controls And Components

    4. Location of Controls and Components Indoor Unit 4.1.1 Location of Control...
  • Page 15 4.1.2 Weekly Timer Setting...
  • Page 16 4.1.3 Setting Up the Special Functions...

  • Page 17: Outdoor Unit

    4.1.4 Main Components Outdoor Unit...

  • Page 18: Dimensions

    5. Dimensions Indoor Unit...

  • Page 19: Outdoor Unit

    Outdoor Unit...

  • Page 20: Refrigeration And Water Cycle Diagram

    6. Refrigeration and Water Cycle Diagram Piping size Min. Max. Rated Additional Piping Piping Model Length Elevation Refrigerant Length Length Liquid (g/m) WH-S*03* ø12.7mm ø6.35mm WH-U*03* (1/2") (1/4") WH-S*05* ø12.7mm ø6.35mm WH-U*05* (1/2") (1/4") * If piping length is over common length, additional refrigerant should be added as shown in the table.

  • Page 22: Block Diagram

    7. Block Diagram...

  • Page 23: Wiring Connection Diagram

    8. Wiring Connection Diagram Indoor Unit...

  • Page 24: Outdoor Unit

    Outdoor Unit...

  • Page 25: Electronic Circuit Diagram

    9. Electronic Circuit Diagram Indoor Unit...

  • Page 26: Outdoor Unit

    Outdoor Unit...

  • Page 27: Printed Circuit Board

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

  • Page 29: Outdoor Unit

    10.2 Outdoor Unit 10.2.1 Main Printed Circuit Board...

  • Page 30: Installation Instruction

    11. Installation Instruction 11.1 Select the Best Location INDOOR UNIT Piping size Addi- Min. Max. There should not be any heat source or steam Rated tional Eleva- Piping Piping Model Length Refrige- near the unit. tion Length Length Gas Liquid rant A place where air circulation in the room is good.

  • Page 31: Indoor Unit

    11.3 Indoor Unit 11.3.3 INDOOR UNIT INSTALLATION 11.3.1 HOW TO FIX INSTALLATION PLATE The mounting wall is strong and solid enough to prevent 11.3.3.1 Install the Indoor Unit it from the vibration. When connecting solar pump station cable between indoor unit and solar pump station, the distance between both apparatuses shall be 2 ~ 8 meters and the length of the said cable must be shorter than 10 meter.
  • Page 32 11.3.3.4 Indoor Unit Refrigerant Pipe An external filter (30 mesh or more, field supplied) must be installed before the water inlet of the indoor Installation unit (with “WATER IN” indication). Please make flare after inserting flare nut Refer to Diagram 4.1 for pipe connection of (located at joint portion of tube assembly) onto Radiator, Floor Heater, Tank Unit, Solar Pump the copper pipe.

  • Page 33: Connect The Cable To The Indoor Unit

    11.3.3.6 Drain Elbow and Hose Installation (Cooling model only) Fix the drain elbow and packing to the bottom Water will drip from this hose, therefore the outlet of indoor unit, as shown in below illustration. of this hose must be installed in an area where the outlet cannot become blocked.
  • Page 34 External Controller shall be connected to 1-pole switch with min 3.0mm contact gap. (connection refer to Diagram 5.2). Its cable must be (2 x min 0.5 mm ), double insulation layer of PVC-sheathed or rubber- sheathed cable. * note: - When making such connection, kindly remove the jumper between terminal no. 17 and 18. - Switch used shall be CE compliance component.
  • Page 35 11.3.4.1 Wire Stripping and Connecting Requirement 11.3.4.2 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 61000-3-12. The equipment’s power supply 2 shall be connected to a suitable supply network, with the following maximum permissible system impedance Z = 0.236Ω...

  • Page 36: Outdoor Unit

    11.4 Outdoor Unit 11.4.1 INSTALL THE OUTDOOR UNIT After selecting the best location, start installation according to Indoor/Outdoor Unit Installation Diagram. Fix the unit on concrete or rigid frame firmly and horizontally by bolt nut (ø10 mm). When installing at roof, please consider strong wind and earthquake.

  • Page 37: Connect The Cable To The Outdoor Unit

    11.4.3 EVACUATION OF THE EQUIPMENT WHEN INSTALLING AN AIR-TO-WATER HEAT PUMP, BE SURE TO EVACUATE THE AIR INSIDE THE INDOOR UNIT AND PIPES in the following procedure. Connect a charging hose with a push pin to the Low side of a charging set and the service port of the 3-way valve.

  • Page 38: Pipe Insulation

    11.4.5 PIPE INSULATION Please carry out insulation at pipe connection portion as mentioned in Indoor/Outdoor Unit Installation Diagram. Please wrap the insulated piping end to prevent water from going inside the piping. If drain hose or connecting piping is in the room (where dew may form), please increase the insulation by using POLY-E FOAM with thickness 6 mm or above.

  • Page 39: 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 40 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 41 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. Heat pump Thermostat characteristic - Water set temperature = Tank set temperature or [51°C] whichever lower. - Heat pump Water Outlet set temperature is set to Maximum (53°C) at tank mode.
  • Page 42 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 44 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 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 45 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 46 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 47 Setting 2: When heating priority is not set by control panel: When Solar Priority is set/not set by control panel: 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 48 - 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 51 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 control panel setting.

  • Page 52: Water Pump

    12.1.10 Outdoor Fan Motor Operation Outdoor 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 53: 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 outdoor unit. Make sure the OFF/ON control panel LED is OFF (no operation). Press the Pump Down button to start the pump down operation.

  • Page 54: Indoor Unit Safety

    12.6 Indoor Unit Safety 12.6.1 Indoor 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 55: Indoor Back-Up Heater Control

    12.9 Indoor Back-Up Heater Control 12.9.1 Indoor 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 56: Base Pan Heater Control (Optional)

    Booster heater Turn Off condition: Tank temperature > Tank set temperature + [+2°C] for continuous 15 sec 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 control panel. 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 57: 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 58: Solar Operation (Optional)

    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 59 Stop condition: a 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 61: 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 of external room thermostat: Wire Connection and thermo characteristic of Siemen REV200: Setting L/L1 (H) Heat Thermo...

  • Page 62: 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 63: 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 control panel at indoor unit.
  • Page 64 13.1.5 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. 13.1.6 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 65: 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 outdoor pipe temperature and outdoor air temperature is low, deice operation start where outdoor fan motor stop.

  • Page 66: 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 67: Servicing Mode

    14. Servicing Mode 14.1 How to Take Out Front Plate Please follow the steps below for take out front plate. Before removing the front plate of indoor unit, always switch off all power supply (i.e. indoor unit power supply, heater power supply and tank unit power supply). Remove the 2 mounting screws which located at bottom of the front plate and 1 mounting screw at the front of the plate.

  • Page 68: How To Adjust Water Flow Rate

    14.5 How to Adjust Water Flow Rate Before adjust the water flow rate, make sure that the total water volume in the installation is 30 litres minimum for heating side and tank side respectively. The default setting is p-c mode, SPEED 4. Please ensure the minimum flow rate is not less than 9L/min. Depend on the hydraulic system pressure loss and type, the water flow rate can be adjusted by turning the red knob on the water pump.

  • Page 69: 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. 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 70 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. a. Take out OLP cover. b. Use a test pen to push the centre button gently in order to reset the Overload protector. c.

  • Page 71: 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 72: Relationship Between The Condition Of The Air-To-Water Heatpump Indoor And Outdoor Units And Pressure And Electric Current

    16.2 Relationship between the Condition of the Air-to-Water Heatpump Indoor and Outdoor Units and Pressure and Electric Current Heating Mode Cooling Mode Condition of the Air-to-Water Heatpump Low Pressure High Pressure Electric current Low Pressure High Pressure Electric current indoor and during operation during operation outdoor units...

  • Page 73: 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 control panel LED will blink and error code will display on the control panel 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 control panel LED will again blink.

  • Page 74: 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 75 Diagnosis display Abnormality/Protection control Abnormality judgement Primary location to verify PFC control 4 times occurrence within 10 Voltage at PFC 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 76: 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 77 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 78 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 79 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 80 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 81 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 0 Vdc or 5 Vdc. Malfunction Caused: Faulty connector connection. Faulty sensor. Faulty outdoor unit PCB (main). Abnormality Judgment: Continue 4 times in 20 minutes.
  • Page 82 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 83 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 84 16.5.9 Indoor-Control Panel Communication Abnormality (H76) Malfunction Decision Conditions: During standby and operation of cooling and heating, indoor-control panel error occur. Malfunction Caused: Faulty connector connection. Faulty control panel. Faulty indoor unit PCB (main).
  • Page 85 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 86 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 87 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 88 16.5.13 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 89 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 90 16.5.15 Outdoor High Pressure Switch Activate (F12) Malfunction Decision Conditions: During operation of cooling and heating, when pressure 4.5 MPa 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 91 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 92 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 > 2550 rpm or < 50 rpm). Malfunction Caused: Operation stop due to short circuit inside the fan motor winding.
  • Page 93 16.5.18 Input Over Current Detection (F16) Malfunction Decision Conditions: During operation of cooling and heating, when outdoor current above 27.9 A 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 94 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 95 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 96 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 ± 5.0 A (for: UD07~09CE) OR 44.7 ± 5.0 A (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 97 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: 0.65 A < I < 1.65 A. 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 98 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 99 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 100 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 101 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 102 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 103 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 104 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 105 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 106 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 107 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 (< 0.65 A) for continuously 20 seconds. Malfunction Caused: CT defective.
  • Page 108 16.5.33 Cooling High Pressure Overload Protection (F95) Malfunction Decision Conditions: During operation of cooling, when pressure 4.0 MPa 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 109: 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. 17.1 To Remove Front Plate Please follow the steps below for take out front plate.

  • Page 110: To Remove Pressure Gauge

    17.3 To Remove Pressure Gauge 17.4 To Remove Control Panel...

  • Page 111: To Remove Rccb

    17.5 To Remove RCCB 17.6 To Remove Transformer and Electronic Controller Board...

  • Page 112: To Remove Pressure Relief Valve, Flow Switch, Water Pump And Bottle Complete

    17.7 To Remove Pressure Relief Valve, Flow Switch, Water Pump and Bottle Complete When reinstall the water pipe, use grease or water at the joining.
  • Page 113 When reinstall the water pipe, use grease or water at the joining. When reinstall the water pipe, use grease or water at the joining.

  • Page 114: Technical Data

    18. Technical Data 18.1 Operation Characteristics 18.1.1 WH-SDC03E3E5 WH-UD03EE5 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 : 7 m 3.400...
  • Page 115 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 Piping length : 7 m 3.400 3.200 3.000 2.800 2.600 2.400 Outdoor Air Temperature (°C) 1.200 1.000 0.800...
  • Page 116 Heating Characteristics at Different Piping Length Condition Outdoor air temperature : 7°C (DBT), 6°C (WBT) Indoor water inlet temperature : 30°C Indoor water outlet temperature : 35°C Piping length : 7 m 3.300 3.200 3.100 3.000 Outdoor Air Temperature (°C) 0.650 0.640 0.630...
  • Page 117 Cooling Characteristics at Different Piping Length Condition Outdoor air temperature : 35°C (DBT), -°C (WBT) Indoor water inlet temperature : 12°C Indoor water outlet temperature : 7°C Piping length : 7 m 3.300 3.200 3.100 3.000 Outdoor Air Temperature (°C) 1.050 1.030 1.010...
  • Page 118 18.1.2 WH-SDC05E3E5 WH-UD05EE5 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 : 7 m 5.100 4.900 4.700 4.500 4.300 4.100 -15 -13 -11 -9...
  • 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 Piping length : 7 m 5.300 4.800 4.300 3.800 3.300 Outdoor Air Temperature (°C) 1.800 1.600 1.400...
  • Page 120 Heating Characteristics at Different Piping Length Condition Outdoor air temperature : 7°C (DBT), 6°C (WBT) Indoor water inlet temperature : 30°C Indoor water outlet temperature : 35°C Piping length : 7 m 5.100 5.000 4.900 4.800 4.700 Outdoor Air Temperature (°C) 1.090 1.080 1.070...
  • Page 121 Cooling Characteristics at Different Piping Length Condition Outdoor air temperature : 35°C (DBT), -°C (WBT) Indoor water inlet temperature : 12°C Indoor water outlet temperature : 7°C Piping length : 7 m 4.600 4.500 4.400 4.300 4.200 Outdoor Air Temperature (°C) 1.680 1.660 1.640...

  • Page 122: Heating Capacity Table

    18.2 Heating Capacity Table 18.2.1 WH-SDC03E3E5 WH-UD03EE5 Water Out Input Input Input Input Input Input Outdoor Air Capacity Capacity Capacity Capacity Capacity Capacity Power Power Power Power Power Power 3200 1260 3200 1390 3100 1520 3000 1640 2800 1780 2750...

  • Page 123: Hydraulic Pump Performance

    18.4 Hydraulic Pump Performance...

  • Page 124: Exploded View And Replacement Parts List

    19. Exploded View and Replacement Parts List 19.1 Indoor Unit 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 125 <Model: WH-SDC03E3E5 WH-SDC05E3E5> REF. NO. DESCRIPTION & NAME QTY. WH-SDC03E3E5 WH-SDC05E3E5 REMARK BASE PAN CWD521279 ← HOT WATER COIL-COMPLETE CWB90C1090 ← RECEIVER CWB141039 ← FLOAT (FLOW SWITCH) CWB621034 ← FLARE NUT (7/8) CWT251032 ← FLARE NUT (5/8) CWT251063 ← PUMP CWB532108 ←...

  • Page 126: Outdoor Unit

    19.2 Outdoor Unit 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 127 <Model: WH-UD03EE5 WH-UD05EE5> REF. NO. DESCRIPTION & NAME QTY. WH-UD03EE5 WH-UD05EE5 REMARK CHASSIS ASS'Y CWD52K1317 ← SOUND PROOF MATERIAL CWG302742 ← FAN MOTOR BRACKET CWD541167 ← SCREW - FAN MOTOR BRACKET CWH551217 ← FAN MOTOR,DC 40W 3PH ARS6411AC ← SCREW - FAN MOTOR MOUNT CWH55252J ←...

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