211.2. Indoor/Outdoor Unit Installation Diagram ---------- 2411.3. Indoor Unit ------------------------------------------------- 2511.4. Outdoor Unit ----------------------------------------------- 2812 Operation and Control----------------------------------------- 3112.1. Basic Function -------------------------------------------- 3112.2. Water Pump ----------------------------------------------- 3212.3. Pump Down Operation --------------------------------- 3312.4. Flow Switch ------------------------------------------------ 3312.5. Auto Restart Control------------------------------------- 3312.6. Indication Panel------------------------------------------- 3313 Protection Control ---------------------------------------------- 3413.1. Protection Control For All Operations--------------- 3413.2. Protection Control For Heating Operation --------- 3514 Servicing Mode -------------------------------------------------- 3614.1. Test Run ---------------------------------------------------- 3614.2. Proper Pump Down Procedure ----------------------- 3614.3. How To Adjust Water Flow Rate---------------------- 3615 Maintenance Guide --------------------------------------------- 3716 Troubleshooting Guide---------------------------------------- 3916.1. Refrigeration Cycle System --------------------------- 3916.2. Relationship Between The Condition Of TheAir-to-Water Heatpump Indoor And OutdoorUnits And Pressure And Electric Current ---------- 4016.3. Breakdown Self Diagnosis Function ---------------- 4116.4. Error Codes Table---------------------------------------- 4216.5. Self-diagnosis Method ---------------------------------- 4317 Disassembly and Assembly Instructions --------------- 6717.1. To Remove Front Plate --------------------------------- 6717.2. To Remove Cabinet-------------------------------------- 6717.3. To Remove Pressure Gauge -------------------------- 6817.4. To Remove Control Panel------------------------------ 6817.5. To Remove Electronic Controller Board andTransformer------------------------------------------------ 6917.6. To Remove RCCB --------------------------------------- 6917.7. To Remove Pressure Relief Valve, FlowSwitch and Water Pump-------------------------------- 7018 Technical Data---------------------------------------------------- 7218.1. Operation Characteristics ------------------------------ 7218.2. Heating Capacity Table --------------------------------- 7618.3. Hydraulic Pump Performance------------------------- 7619 Exploded View and Replacement Parts List ----------- 7719.1. WH-SD24AE WH-SD28AE --------------------------- 7719.2. WH-UD24AE WH-UD28AE --------------------------- 79