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TROUBLESHOOTING

TROUBLESHOOTING. 5WSS TROUBLESHOOTING. Wired Controller. Wireless Controller. 5WMWS-GR Series. 5CKWS-AR. 5CKWS-CR. E1. Room Sensor Contact Loose. E2. Indoor Coil Sensor Contact Loose. Check whether connection loose?. Check wire exposed and broken?. Room Sensor. 5WSS TROUBLESHOOTING.

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TROUBLESHOOTING

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  1. TROUBLESHOOTING

  2. 5WSS TROUBLESHOOTING Wired Controller

  3. Wireless Controller 5WMWS-GR Series

  4. 5CKWS-AR

  5. 5CKWS-CR

  6. E1 Room Sensor Contact Loose E2 Indoor Coil Sensor Contact Loose Check whether connection loose? Check wire exposed and broken? Room Sensor 5WSS TROUBLESHOOTING Wire Exposed and broken? Indoor Coil Sensor

  7. E3 Water Outlet Sensor Contact Loose Check the pin loose? Check wire exposed and broken? Check whether connection loose? Water Outlet Sensor

  8. Safety Devices

  9. E4 Compressor Overload HP tripped • Water Flow • Water Temp 5WSS07~25AR Cooling & Heating Mode High (600 psig)

  10. E4 Compressor Overload Check whether is HP or LP tripped Power on the unit Pressure at Gas/ Liquid Valve? Pressure at access valve at condenser out? • Gas Leak • Liquid/ Gas Valve not open • Cap. tube choked • Water Flow • Water Temp 5WSS30~60AR Cooling Mode Low (7 psig) High (600 psig)

  11. E4 Compressor Overload Check whether is HP or LP tripped Power on the unit Pressure at Gas/ Liquid Valve? Pressure at access valve at Evaporator In? • Water Flow • Water Temp • Gas Leak • Liquid/ Gas Valve not open 5WSS40~60AR Heating Mode High (600 psig) Low (7 psig)

  12. E5 Gas Leak Cooling or Heating? Normal Operation Normal Operation Temp > 24°C for 5 min? Temp > 20°C for 5 min? • Check for leakage • Low Charge (check pressure) • Indoor coil sensor loosen from coil (rare) Check indoor coil temperature (system on for 30 mins) Cool Heat No Yes Yes No

  13. E6 Pump Fault Water is flowing out (drain pipe)? Water level switch spoil (rare)? Pump suction port choked? WTP connection loose? Fix it Change it Connect it Clean drain pan Applicable for CK unit only Yes No No WTP Yes Yes No Yes

  14. E9 Water Outlet Temp Faulty Water Inlet Temp too high (out of operating range)? Water Flow? Cooling or Heating? Operating Range Unit Not Start (20s) : 13°C < Temp <45°C Unit Start: 15°C < Temp < 52°C Operating Range Unit Not Start (20s) : 10°C < Temp <35°C Unit Start: 6°C < Temp < 32°C 1. Cooling tower on? 2. Pump on? 1. Pump on? 2. Strainer choked? 3. Valves open? Cool Heat No No Yes No Yes

  15. WH TROUBLESHOOTING WH11/12/15/20B/BR

  16. WH25~70B/BR

  17. WH PCB Board APM01CB- Single Compressor APM02D-Twin Compressor CN2- SLM15A CN4- APW04A CN1- SLM15A CN6- APW04A

  18. E1 Water Level Switch Error Check connectivity of Water Level Switch Confirm Spoil? Change it Water Level Switch Normal Operation WH TROUBLESHOOTING Model: WH11/12/15/20B/BR Yes No

  19. E2 Compressor Low Pressure Protection • Gas Leak • Liquid/ Gas Valve not open • Cap. tube choked LP tripped Low (7 psig)

  20. E3 Compressor High Pressure Protection HP tripped High (470 psig) 1. Water Flow 2. Water Temp

  21. E4 Return Air Sensor Missing or Damaged E5 Indoor Coil Sensor Missing or Damaged E6 Water Outlet Sensor Missing or Damaged E7 Suction Sensor Missing or Damaged Check whether missing or damaged? Fix or Change it

  22. Check for leakage • Low Charge (check pressure) • Indoor coil sensor loosen from coil (rare) E8 Gas Leak Comp run  5 mins Normal Operation No Tin coil  Tr – 3°C (Cooling) Tin coil  Tr + 3°C (Heating) Yes

  23. Water is flowing out (drain pipe)? Water level switch spoil (rare)? Pump suction port choked? WTP connection loose? Fix it Change it Connect it Clean drain pan Optional Items EA Pump Fault Yes No No Yes Yes No Yes

  24. Water Inlet Temp too high (out of operating range)? Water Flow? 1. Cooling tower on? 2. Pump on? 1. Pump on? 2. Strainer choked? 3. Valves open? Eb Temperature of Water Entering too high or low Yes No Yes

  25. Ec Suction Temperature too low Yes Compressor tripped and auto-reset Tsuc < -6°C? No Normal Operation

  26. Model: WH25/30/40/50/60/70B/BR E0 Indoor Coil 1 Sensor Missing or Damaged E1 Indoor Coil 2 Sensor Missing or Damaged E2 Return Air Sensor Missing or Damaged Check whether missing or damaged? Fix or Change it

  27. E3 Water Outlet 1 Sensor Missing or Damaged E4 Water Outlet 2 Sensor Missing or Damaged E6 Suction 1 Sensor Missing or Damaged E7 Suction 2 Sensor Missing or Damaged Check whether missing or damaged? Fix or Change it

  28. Check for leakage • Low Charge (check pressure) • Indoor coil sensor loosen from coil (rare) Eb Compressor 1 Gas Leaking Ec Compressor 2 Gas Leaking Comp run  5 mins Normal Operation No Tin coil  Tr – 3°C (Cooling) Tin coil  Tr + 3°C (Heating) Yes

  29. Check whether fan spoil • Over-charged Available in COOL and DRY mode Ed Compressor 1 Indoor Coil Frosting Ef Compressor 2 Indoor Coil Frosting

  30. EE Network Communication Port Error Check whether wrong terminal connection? Yes Change it

  31. Gas Leak • Liquid/ Gas Valve not open • Cap. tube choked LP tripped F1 Compressor 2 Low Pressure Failure Input Contact F9 Compressor 1 Low Pressure Failure Input Contact Low (7 psig)

  32. F2 Compressor 2 High Pressure Failure Input Contact F8 Compressor 1 High Pressure Failure Input Contact HP tripped High (470 psig) 1. Water Flow 2. Water Temp

  33. F0 F3 Water Flow Failure Input Contact Water Level Failure Input Contact Optional Items 1. No Water Flow 2. Insufficient Water Flow 1. WP connection loose 2. Pump suction port choked 3. Water Level Switch spoiled

  34. Water Inlet Temp too high (out of operating range)? Water Flow? 1. Cooling tower on? 2. Pump on? 1. Pump on? 2. Strainer choked? 3. Valves open? Fb Entering Water Temperature 1 Failure Fd Entering Water Temperature 2 Failure Yes No Yes

  35. FE Suction Temperature too low Yes Compressor tripped and auto-reset Tsuc < -6°C? No Normal Operation

  36. Thank You

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