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In order to avoid frostbite, be assured of no refrigerant leakage during the instation or repairing of refrigerant circuit.

 

 

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. 

service or repair the products dealt with in this service information by anyone else could result in serious injury or death. 

2 

 

 

 

 

2.1

 

WH-SDC09F3E8 WH-UD09FE8 ................... 7

 

2.2

 

WH-SDC12F9E8 WH-UD12FE8 ................. 10

 

2.3

 

WH-SDC14F9E8 WH-UD14FE8 ................. 13

 

2.4

 

WH-SDC16F9E8 WH-UD16FE8 ................. 16

 

 

 

 

 

4.1

 

Indoor Unit ................................................... 20

 

4.2

 

Outdoor Unit ................................................. 28

 

 

 

5.1

 

Indoor Unit ................................................... 29

 

5.2

 

Outdoor Unit ................................................. 30

 

 

 

 

 

7.1

 

WH-SDC09F3E8 WH-UD09FE8 ................. 33

 

7.2

 

WH-SDC12F9E8 WH-UD12FE8 
WH-SDC14F9E8 WH-UD14FE8 
WH-SDC16F9E8 WH-UD16FE8 ................. 34

 

 

 

8.1

 

Indoor Unit ................................................... 35

 

8.2

 

Outdoor Unit ................................................. 37

 

 

 

9.1

 

Indoor Unit ................................................... 38

 

9.2

 

Outdoor Unit ................................................. 40

 

 

 

10.1

 

Indoor Unit ................................................... 41

 

10.2

 

Outdoor Unit ................................................. 43

 

 

 

11.1

 

Select the Best Location .............................. 45

 

11.2

 

Indoor/Outdoor Unit Installation Diagram .... 45

 

11.3

 

Indoor Unit ................................................... 46

 

11.4

 

Outdoor Unit ................................................. 51

 

 

 

12.1

 

Select the Best Location .............................. 55

 

12.2

 

Indoor/Outdoor Unit Installation Diagram .... 55

 

12.3

 

Indoor Unit ................................................... 56

 

12.4

 

Outdoor Unit ................................................. 61

 

 

 

13.1

 

Basic Function ............................................. 65

 

13.2

 

Water Pump ................................................. 86

 

13.3

 

Pump Down Operation [Service Mode: 01] . 88

 

13.4

 

Flow Switch .................................................. 88

 

13.5

 

Indoor Unit Safety ........................................ 89

 

13.6

 

Auto Restart Control .................................... 89

 

13.7

 

Indication Panel ........................................... 89

 

13.8

 

Indoor Back-Up Heater Control ................... 90

 

13.9

 

Tank Booster Heater Control ....................... 91

 

13.10

 

Base Pan Heater Control (Optional) ............ 91

 

13.11

 

Sterilization Mode ........................................ 92

 

13.12

 

Quiet Operation ............................................92

 

13.13

 

Anti Freeze Control ......................................93

 

13.14

 

Solar Operation (Optional) ...........................94

 

13.15

 

External Room Thermostat Control (Optional) 
  ....................................................................98

 

13.16

 

Three Ways Valve Control ...........................99

 

13.17

 

Two Ways Valve Control..............................99

 

13.18

 

External OFF/ON Control ......................... 100

 

13.19

 

Holiday Mode ............................................ 101

 

13.20

 

Dry Concrete Function .............................. 101

 

 

 

14.1

 

Protection Control for All Operations ........ 102

 

14.2

 

Heat Exchanger (HEX) Protection Control 104

 

14.3

 

Protection Control for Heating Operation.. 105

 

14.4

 

Protection Control for Cooling Operation .. 107

 

 

 

15.1

 

How to Take Out Front Plate .................... 108

 

15.2

 

How to Take Out Side Cabinet ................. 108

 

15.3

 

Test Run ................................................... 108

 

15.4

 

Proper Pump Down Procedure [SERVICE 
MODE: 01] ................................................ 108

 

15.5

 

How to Adjust Water Flow Rate [SERVICE 
MODE: 02] ................................................ 109

 

15.6

 

Expansion Vessel Pre Pressure Checking 109

 

15.7

 

How to Unlock Cool Mode ........................ 109

 

15.8

 

Dry Concrete [SERVICE MODE: 03] ........ 110

 

15.9

 

EEPROM Factory Default Data Setup 
Procedure ................................................. 110

 

 

 

 

 

17.1

 

Refrigeration Cycle System ...................... 113

 

17.2

 

Relationship between the Condition of the Air-
to-Water Heatpump Indoor and Outdoor Units 
and Pressure and Electric Current ............ 114

 

17.3

 

Breakdown Self Diagnosis Function ......... 115

 

17.4

 

Error Codes Table ..................................... 116

 

17.5

 

Self-diagnosis Method .............................. 118

 

 

 

18.1

 

To Remove Front Plate ............................. 155

 

18.2

 

To Remove Cabinet .................................. 155

 

18.3

 

To Remove Pressure Gauge .................... 156

 

18.4

 

To Remove Control Panel ........................ 156

 

18.5

 

To Remove RCCB .................................... 157

 

18.6

 

To Remove Transformer and Electronic 
Controller Board ........................................ 158

 

18.7

 

To Remove Pressure Relief Valve, Flow 
Switch and Air Purge Valve ...................... 158

 

18.8

 

To Remove Water Pump and Bottle Complete
  ................................................................. 159

 

 

 

19.1

 

Operation Characteristics ......................... 161

 

19.2

 

Heating Capacity Table............................. 185

 

19.3

 

Cooling Capacity Table ............................. 186

 

 

 

20.1

 

Indoor Unit ................................................ 187

 

3 

20.2

 

Outdoor Unit .............................................. 190

 

4 

  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. Incorrect installation or servicing due to ignoring of the instruction 
will cause harm or damage, and the seriousness is classified by the following indications. 

 

 

This indication shows the possibility of causing death or serious injury. 

 

This indication shows the possibility of causing injury or damage to properties. 

 

  The items to be followed are classified by the symbols: 
 

 

  Carry out test run to confirm that no abnormality occurs after the servicing. Then, explain to user the operation, 

care and maintenance as stated in instructions. Please remind the customer to keep the operating instructions for 
future reference. 

 

 

1.   Do not modify the machine, part, material during repairing service. 

2.   If wiring unit is supplied as repairing part, do not repair or connect the wire even only partial wire break. Exchange the whole wiring unit. 

3.   Do not wrench the fasten terminal. Pull it out or insert it straightly. 

4.   Engage dealer or specialist for installation and servicing. If installation of servicing done by the user is defective, it will cause water leakage, 
      electrical shock or fire. 

5.   Install according to this installation instructions strictly. If installation is defective, it will cause water leakage, electric shock or fire. 

6.   Use the attached accessories parts and specified parts for installation and servicing. Otherwise, it will cause the set to fall, water leakage, 
      refrigerant leakage, fire or electrical shock. 

7.   Install at a strong and firm location which is able to withstand the set’s weight. If the strength is not enough or installation is not properly done,
      the set will drop and cause injury. 
8.   Do not install outdoor unit near handrail of veranda. When installing outdoor unit at veranda of high rise building, child may climb up  
      to outdoor unit and cross over the handrail and causing accident. 

9.   For electrical work, follow the local national wiring standard, regulation and the installation instruction. An independent circuit and single outlet
      must be used. If electrical circuit capacity is not enough or defect found in electrical work, it will cause electrical shock or fire. 

10. This equipment must be properly earthed. Earth line must not be connected to gas pipe, water pipe, earth of lightning rod and telephone. 
      Otherwise, it may cause electric shock in case equipment breakdown or insulation breakdown. 
11. Do not use joint cable for indoor/outdoor connection cable. Use specified indoor/outdoor connection cable, refer to Installation Instructions 
      CONNECT THE CABLE TO THE INDOOR UNIT and connect tightly for indoor/outdoor connection. Clamp the cable so that no external force
      will be acted on the terminal. If connection or fixing is not perfect, it will cause heat up or fire at the connection. 
12. When install or relocate Air to Water Heatpump indoor/outdoor unit, do not let any substance other than the specified refrigerant, eg. air etc.
      mix into refrigerant cycle (piping). Mixing of air etc. will cause abnormal high pressure in refrigeration cycle and result in explosion, injury etc. 
13. This is a R410A model, when connecting the piping, do not use any existing (R22) pipes and flare nuts. Using such same may cause 
      abnormally high pressure in the refrigeration cycle (piping), and possibly result in explosion and injury. Use only R410A refrigerant. 
      Thickness of copper pipes used with R410A must be more than 0.8 mm. Never use copper pipes thinner than 0.8 mm. 
      It is desirable that the amount of residual oil is less than 40 mg/10 m. 
14. During installation, install the refrigerant piping properly before run the compressor. Operation of compressor without fixing refrigeration piping
      and valves at opened condition will cause suck-in of air, abnormal high pressure in refrigeration cycle and result in explosion, injury etc. 
15. During pump down operation, stop the compressor before remove the refrigeration piping. Removal of refrigeration piping while compressor is
      operating and valves are opened condition will cause suck-in of air, abnormal high pressure in refrigeration cycle and result in explosion,  
      injury  etc. 
16. After completion of the installation servicing confirm there is no leakage of refrigerant gas. It may generate toxic gas when the refrigerant 
      contacts with fire. 

17. Ventilate the room if there is refrigerant gas leakage during operation. Extinguish all fire sources if present. It may cause toxic gas when the 
      refrigerant contacts with fire. 

18. Only use the supplied or specified installation parts, else, it may cause unit vibrate loose, water/refrigerant leakage, electrical shock or fire. 

 

This symbol denotes item that is PROHIBITED from doing.