Panasonic WH-UD28AE Service Manual page 2

11.2. Indoor/Outdoor Unit Installation Diagram ---------- 24
11.3. Indoor Unit ------------------------------------------------- 25
11.4. Outdoor Unit ----------------------------------------------- 28
12 Operation and Control----------------------------------------- 31
12.1. Basic Function -------------------------------------------- 31
12.2. Water Pump ----------------------------------------------- 32
12.3. Pump Down Operation --------------------------------- 33
12.4. Flow Switch ------------------------------------------------ 33
12.5. Auto Restart Control------------------------------------- 33
12.6. Indication Panel------------------------------------------- 33
13 Protection Control ---------------------------------------------- 34
13.1. Protection Control For All Operations--------------- 34
13.2. Protection Control For Heating Operation --------- 35
14 Servicing Mode -------------------------------------------------- 36
14.1. Test Run ---------------------------------------------------- 36
14.2. Proper Pump Down Procedure ----------------------- 36
14.3. How To Adjust Water Flow Rate---------------------- 36
15 Maintenance Guide --------------------------------------------- 37
16 Troubleshooting Guide---------------------------------------- 39
16.1. Refrigeration Cycle System --------------------------- 39
16.2. Relationship Between The Condition Of The
Air-to-Water Heatpump Indoor And Outdoor
Units And Pressure And Electric Current ---------- 40
16.3. Breakdown Self Diagnosis Function ---------------- 41
16.4. Error Codes Table---------------------------------------- 42
16.5. Self-diagnosis Method ---------------------------------- 43
17 Disassembly and Assembly Instructions --------------- 67
17.1. To Remove Front Plate --------------------------------- 67
17.2. To Remove Cabinet-------------------------------------- 67
17.3. To Remove Pressure Gauge -------------------------- 68
17.4. To Remove Control Panel------------------------------ 68
17.5. To Remove Electronic Controller Board and
Transformer------------------------------------------------ 69
17.6. To Remove RCCB --------------------------------------- 69
17.7. To Remove Pressure Relief Valve, Flow
Switch and Water Pump-------------------------------- 70
18 Technical Data---------------------------------------------------- 72
18.1. Operation Characteristics ------------------------------ 72
18.2. Heating Capacity Table --------------------------------- 76
18.3. Hydraulic Pump Performance------------------------- 76
19 Exploded View and Replacement Parts List ----------- 77
19.1. WH-SD24AE WH-SD28AE --------------------------- 77
19.2. WH-UD24AE WH-UD28AE --------------------------- 79
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