12. Operation and Control ........46 19. Exploded View and Replacement Parts 12.1 Basic Function ..........46 List ..............135 12.2 Water Pump ..........58 19.1 WH-SDC09C3E8 WH-SDC12C9E8 12.3 Pump Down Operation ........58 WH-SDC14C9E8 WH-SDC16C9E8 ..135 12.4 Flow Switch..........58 19.2 WH-UD09CE8 WH-UD12CE8 12.5 Force Heater Mode Operation .....59...
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. ...
Page 4
- Power 2: Use approved 15/16A 2-poles circuit breaker with a minimum contact gap of 3.0mm. - Power 3: Use approved 15/16A 4-poles circuit breaker with a minimum contact gap of 3.0mm. (Not applicable for WH-SDC09C3E8) 8. Do not release refrigerant during piping work for installation, servicing, re-installation and during repairing a refrigeration parts. Take care of the liquid refrigerant, it may cause frostbite.
2. Specifications WH-SDC09C3E8 WH-UD09CE8 Item Unit Outdoor Unit 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 Noise Level Cooling: 49 dB (A) Heating: 49...
Page 6
Item Unit Input Power Cooling: 2.25 Heating: 1.90 Starting Current Running Current Cooling: 3.4 Heating: 2.9 Max. Current / Max. Input Power Heatpump Unit A / kW 7.5 (11.8) / 4.94 (7.94) (Heatpump Unit + Back-up Heater) Back-up Heater: Max. Current / Max. Input Power A / kW Common ELCB to Heatpump Tank Heater [1 Phase, 230V]: Max.
WH-SDC12C9E8 WH-UD12CE8 Item Unit Outdoor Unit Performance Test Condition EUROVENT Cooling Capacity 10.00 BTU/h 34100 kcal/h 8600 2.82 kcal/hW 2.42 Heating Capacity 12.00 BTU/h 41000 kcal/h 10320 4.67 kcal/hW 4.02 Noise Level Cooling: 50 dB (A) Heating: 50 Cooling: 68 Power Level dB Heating: 67 Air Flow...
Page 8
Item Unit Starting Current Running Current Cooling: 5.3 Heating: 3.9 Max. Current / Max. Input Power Heatpump Unit A / kW 8.8 / 5.85 (Separate ELCB) (Heatpump Unit + Back-up Heater) Back-up Heater: Max. Current / Max. Input Power A / kW 13.0 / 9.00 Tank Heater [1 Phase, 230V]: Max.
WH-SDC14C9E8 WH-UD14CE8 Item Unit Outdoor Unit 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 Noise Level Cooling: 52 dB (A) Heating: 51 Cooling: 70 Power Level dB Heating: 68 Air Flow...
Page 10
Item Unit Starting Current Running Current Cooling: 6.6 Heating: 4.7 Max. Current / Max. Input Power Heatpump Unit A / kW 9.4 / 6.25 (Separate ELCB) (Heatpump Unit + Back-up Heater) Back-up Heater: Max. Current / Max. Input Power A / kW 13.0 / 9.00 Tank Heater [1 Phase, 230V]: Max.
WH-SDC16C9E8 WH-UD16CE8 Item Unit Outdoor Unit 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 Noise Level Cooling: 54 dB (A) Heating: 53 Cooling: 72 Power Level dB Heating: 70 Air Flow...
Page 12
Item Unit Starting Current Running Current Cooling: 7.2 Heating: 5.7 Max. Current / Max. Input Power Heatpump Unit A / kW 9.9 / 6.59 (Separate ELCB) (Heatpump Unit + Back-up Heater) Back-up Heater: Max. Current / Max. Input Power A / kW 13.0 / 9.00 Tank Heater [1 Phase, 230V]: Max.
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 40 meter with height difference 30 meter - Flexible 4-way piping for outdoor unit ...
6. Refrigeration and Water Cycle Diagram Piping size Min. Max. Rated Common Additional Piping Piping Model Length Length Elevation Refrigerant Liquid Length Length (g/m) UD09CE8 5/8” 3/8” UD12CE8 5/8” 3/8” UD14CE8 5/8” 3/8” UD16CE8 5/8” 3/8” * If piping length is over common length, additional refrigerant should be added as shown in the table.
11. Installation Instruction 11.1 Select the Best Location Rated Min. Max. Addi- Piping size Indoor Unit Length Eleva- Piping Piping tional tion Length Length Refrige- There should not be any heat source or steam Model rant Gas Liquid near the unit. (g/m) ...
11.3 Indoor Unit 11.3.3 Indoor Unit Installation 11.3.1 How to Fix Installation Plate 11.3.3.1 Install the Indoor Unit The mounting wall is strong and solid enough to prevent it from 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 38
11.3.3.3 Indoor Unit Refrigerant Pipe If old heatpump terminal/tank is utilized, please clean the dust properly before installation. Installation Refer Diagram 4.1 for installation of 3-way Valve Kit Please make flare after inserting flare nut and 2-way Valve Kit. (located at joint portion of tube assembly) onto ...
11.3.4 Connect the Cable to the Indoor Unit Connecting cable between indoor unit and outdoor unit shall be approved polychloroprene sheathed (6 x min 1.5 mm ) flexible cord, type designation 60245 IEC 57 or heavier cord. Ensure the colour of wires of outdoor unit and the terminal Nos. are the same to the indoor unit’s respectively.
Page 40
Solar Pump Station’s cable shall be (2 x min 0.5 mm ), of double insulation PVC-sheathed or rubber- sheathed cable. Strongly recommended install with maximum length of 10 meter only. Terminal screw Tightening torque N•cm {kgf•cm} 157~196 {16~20} 196~245 {20~25}...
Page 41
11.3.4.1 Wire Stripping and Connecting Requirement 11.3.4.2 Connecting Requirement For SDC09C3E8/UD09CE8 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 SDC12C9E8/UD12CE8, SDC14C9E8/UD14CE8, SDC16C9E8/UD16CE8 The equipment’s power supply 1 complies with IEC/EN 61000-3-2. ...
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 43
Cutting and Flaring the Piping Please cut using pipe cutter and then remove the burrs. Remove the burrs by using reamer. If burrs is not removed, gas leakage may be caused. Turn the piping end down to avoid the metal powder entering the pipe. Please make flare after inserting the flare nut onto the copper pipes.
11.4.4 Connect the Cable to the Outdoor Unit (FOR DETAIL REFER TO WIRING DIAGRAM AT UNIT) Remove the control board cover from the unit by loosening the screw. Connecting cable between indoor unit and outdoor unit shall be approved polychloroprene sheathed (6 x min 1.5 mm ) flexible cord, type designation 60245 IEC 57 or heavier cord.
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.
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 47
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 48
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 49
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 50
Solar Priority is Set Solar Priority is Not Set...
Page 51
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 Booster heater control: Booster heater On/Off follow normal operation...
Page 52
Case 2: Heatpump THERMO OFF TEMP: Heatpump THERMO OFF TEMP = 55°C + [+2°C]. 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: THERMO ON TEMP = Tank temp.
Page 53
Heat + Tank (Heating No Priority) (Solar Priority Set)
Page 54
Heat + Tank (Heating No Priority) (Solar Priority Not Set)
Page 55
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 56
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 57
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. ...
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.
12.5 Force Heater Mode Operation The backup heater also serves as backup in case of malfunctioning of the outdoor 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.
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 Indoor Back-Up Heater Control 12.9.1 Indoor Electric Heater Control Normal Heating Mode Heater On condition: a.
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).
12.13 Quiet Operation Purpose: - To provide quiet operation compare to normal operation by reduces outdoor unit noise. Starting condition: When quiet button is presses. When quiet request ON time by weekly timer (Refer to control panel.) When any of above mentioned condition is achieved, this control is activated.
Page 63
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. Tank hot water temp is below solar on upper limit temp [EEPROM 1 : 70]°C. iii) Heatpump thermo OFF in tank mode OR Heatpump operate to room side.
Page 64
(Solar Priority Not Set) Heat + Tank Mode (Heating Priority Set)
Page 65
Tank Mode (Solar Priority Set) (Solar Priority Not Set)
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.
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 69
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...
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.
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. Set ON to the indoor unit and RCCB. Then, for control panel’s operation please refers to air-to-water heatpump’s operation instruction.
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 73
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.
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.
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...
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. ...
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 78
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.
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 80
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 81
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 82
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 83
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 84
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 85
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 86
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 87
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 88
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 89
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 90
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 91
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 92
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 93
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 94
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 95
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 96
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 97
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 98
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 99
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 100
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 101
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 102
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 103
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 104
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 105
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 106
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 107
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 108
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 109
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 110
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 111
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.
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.
18. Technical Data 18.1 Operation Characteristics 18.1.1 WH-SDC09C3E8 WH-UD09CE8 Heating Characteristics at Different Outdoor Air Temperature Condition Outdoor air temperature : 7°C (DBT), 6°C (WBT) Indoor water inlet temperature : 30°C Indoor water outlet temperature : 35°C Piping length : 7m...
Page 118
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 : 7m...
Page 119
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 : 7m...
Page 120
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 : 7m...
Page 121
18.1.2 WH-SDC12C9E8 WH-UD12CE8 Heating Characteristics at Different Outdoor Air Temperature Condition Outdoor air temperature : 7°C (DBT), 6°C (WBT) Indoor water inlet temperature : 30°C Indoor water outlet temperature : 35°C Piping length : 7m...
Page 122
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 : 7m...
Page 123
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 : 7m...
Page 124
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 : 7m...
Page 125
18.1.3 WH-SDC14C9E8 WH-UD14CE8 Heating Characteristics at Different Outdoor Air Temperature Condition Outdoor air temperature : 7°C (DBT), 6°C (WBT) Indoor water inlet temperature : 30°C Indoor water outlet temperature : 35°C Piping length : 7m...
Page 126
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 : 7m...
Page 127
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 : 7m...
Page 128
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 : 7m...
Page 129
18.1.4 WH-SDC16C9E8 WH-UD16CE8 Heating Characteristics at Different Outdoor Air Temperature Condition Outdoor air temperature : 7°C (DBT), 6°C (WBT) Indoor water inlet temperature : 30°C Indoor water outlet temperature : 35°C Piping length : 7m...
Page 130
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 : 7m...
Page 131
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 : 7m...
Page 132
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 : 7m...
19. Exploded View and Replacement Parts List 19.1 WH-SDC09C3E8 WH-SDC12C9E8 WH-SDC14C9E8 WH-SDC16C9E8 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 136
<Model: WH-SDC09C3E8 WH-SDC12C9E8 WH-SDC14C9E8 WH-SDC16C9E8> REF. DESCRIPTION & NAME QTY. WH-SDC09C3E8 WH-SDC12C9E8 WH-SDC14C9E8 WH-SDC16C9E8 REMARKS CWD521279 BASE PAN ← ← ← CWB90C1051 HOT WATER COIL-COMPLETE ← ← ← CWB141039 RECEIVER ← ← ← CWB601008 FLOAT (FLOW SWITCH) ← ← ←...
Page 139
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.