TROUBLESHOOTING

5WSS TROUBLESHOOTING ERROR CODEFAULTY INDICATION E1ROOM SENSOR CONTACT LOOSE E2INDOOR COIL SENSOR CONTACT LOOSE E3WATER OUTLET SENSOR CONTACT LOOSE E4COMPRESSOR OVERLOAD E5GAS LEAK E6PUMP FAULT E9WATER OUTLET TEMPERATURE FAULTY Wired Controller

Wireless Controller 5WMWS-GR Series

5CKWS-AR

5CKWS-CR

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

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

ModelComponents 5WSS07~25ARHP switch only 5WSS30~60ARHP & LP Switch Safety Devices

5WSS07~25AR E4 Compressor Overload HP tripped 1.Water Flow 2.Water Temp High (600 psig) Cooling & Heating Mode

5WSS30~60AR E4 Compressor Overload Power on the unit Check whether is HP or LP tripped Pressure at access valve at condenser out? Pressure at Gas/ Liquid Valve? Cooling Mode 1.Water Flow 2.Water Temp High (600 psig) 1.Gas Leak 2.Liquid/ Gas Valve not open 3.Cap. tube choked Low (7 psig)

5WSS40~60AR E4 Compressor Overload Power on the unit Check whether is HP or LP tripped Pressure at access valve at Evaporator In? Pressure at Gas/ Liquid Valve? Heating Mode 1.Water Flow 2.Water Temp High (600 psig) 1.Gas Leak 2.Liquid/ Gas Valve not open Low (7 psig)

E5 Gas Leak Temp > 24°C for 5 min? Check indoor coil temperature (system on for 30 mins) Yes No Yes Normal Operation 1.Check for leakage 2.Low Charge (check pressure) 3.Indoor coil sensor loosen from coil (rare) Normal Operation No Cooling or Heating? CoolHeat Temp > 20°C for 5 min?

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

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

WH TROUBLESHOOTING Error CodeDescription E1Water Level Switch error E2Compressor low pressure protection E3Compressor high pressure protection E4Return air sensor missing or damaged E5Indoor coil sensor missing or damaged E6Water outlet sensor missing or damaged E7Suction sensor missing or damaged E8Gas Leak E9Coil temperature exceed 68°C EAPump fault EbTemperature of water entering too high or low EcSuction Temperature too low WH11/12/15/20B/BR

E0Indoor coil 1 sensor missing or damaged E1Indoor coil 2 sensor missing or damaged E2Return air sensor missing or damaged E3Water outlet 1 sensor missing or damaged E4Water outlet 2 sensor missing or damaged E6Suction 1 sensor missing or damaged E7Suction 2 sensor missing or damaged EbCompressor 1 gas leaking EcCompressor 2 gas leaking EdCompressor 1 indoor coil frosting EENetworking Communication Port Error EfCompressor 2 indoor coil frosting F0Water Flow Failure Input Contact F1Compressor 2 low pressure failure input contact F2Compressor 2 high pressure failure input contact F3Water level failure input contact F4Compressor 2 overload failure input contact F5Compressor 1 overload failure input contact F6Fan overload failure input failure F7Water pump overload failure input contact F8Compressor 1 high pressure failure input contact F9Compressor 1 low pressure failure input contact FAElectrical heater overload failure input contact FbEntering water temperature 1 failure FdEntering water temperature 2 failure FESuction temperature too low WH25~70B/BR

APM01CB- Single CompressorAPM02D-Twin Compressor WH PCB Board CN4- APW04A CN6- APW04A CN1- SLM15A CN2- SLM15A

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

E2 Compressor Low Pressure Protection 1.Gas Leak 2.Liquid/ Gas Valve not open 3.Cap. tube choked Low (7 psig) LP tripped

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

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

E8 Gas Leak Comp run  5 mins T in coil  Tr – 3°C (Cooling) T in coil  Tr + 3°C (Heating) No Yes 1.Check for leakage 2.Low Charge (check pressure) 3.Indoor coil sensor loosen from coil (rare) Normal Operation

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

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

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

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

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

Eb Compressor 1 Gas Leaking Ec Compressor 2 Gas Leaking Comp run  5 mins T in coil  Tr – 3°C (Cooling) T in coil  Tr + 3°C (Heating) No Yes1.Check for leakage 2.Low Charge (check pressure) 3.Indoor coil sensor loosen from coil (rare) Normal Operation

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

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

F9 Compressor 1 Low Pressure Failure Input Contact F1 Compressor 2 Low Pressure Failure Input Contact 1.Gas Leak 2.Liquid/ Gas Valve not open 3.Cap. tube choked Low (7 psig) LP tripped

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

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

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

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

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