Technical Training 2007Technical Training 2007
TROUBLESHOOTINGTROUBLESHOOTING
Technical Training 2007Technical Training 2007
5WSS TROUBLESHOOTING
ERROR CODE FAULTY INDICATION
E1 ROOM SENSOR CONTACT LOOSE
E2 INDOOR COIL SENSOR CONTACT LOOSE
E3 WATER OUTLET SENSOR CONTACT LOOSE
E4 COMPRESSOR OVERLOAD
E5 GAS LEAK
E6 PUMP FAULT
E9 WATER OUTLET TEMPERATURE FAULTY
Wired Controller
Technical Training 2007Technical Training 2007
Wireless Controller
5WMWS-GR Series
Technical Training 2007Technical Training 2007
5CKWS-AR
Technical Training 2007Technical Training 2007
5CKWS-CR
Technical Training 2007Technical Training 2007
5WSS TROUBLESHOOTING
E1
E2
Room Sensor Contact Loose
Indoor Coil Sensor Contact Loose
Indoor Coil Sensor
Room Sensor
Check whether connection loose?
Check wire exposed and broken?
Wire Exposed and broken?
Technical Training 2007Technical Training 2007
E3 Water Outlet Sensor Contact Loose
Water Outlet Sensor
Check the pin loose?
Check wire exposed and broken?
Check whether connection loose?
Technical Training 2007Technical Training 2007
Model Components
5WSS07~25AR HP switch only
5WSS30~60AR HP & LP Switch
Safety Devices
Technical Training 2007Technical Training 2007
5WSS07~25AR
E4 Compressor Overload
HP tripped
1. Water Flow
2. Water Temp
High (600 psig)
Cooling & Heating Mode
Technical Training 2007Technical Training 2007
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)
Technical Training 2007Technical Training 2007
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)
Technical Training 2007Technical Training 2007
E5 Gas Leak
Temp > 24°C for 5 min?
Check indoor coil temperature (system on for 30 mins)
YesNo
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?
Cool Heat
Temp > 20°C for 5 min?
Technical Training 2007Technical Training 2007
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
Technical Training 2007Technical Training 2007
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
Yes
No
Technical Training 2007Technical Training 2007
WH TROUBLESHOOTING
Error Code Description
E1 Water Level Switch error
E2 Compressor low pressure protection
E3 Compressor high pressure protection
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
E8 Gas Leak
E9 Coil temperature exceed 68°C
EA Pump fault
Eb Temperature of water entering too high or low
Ec Suction Temperature too low
WH11/12/15/20B/BR
Technical Training 2007Technical Training 2007
E0 Indoor coil 1 sensor missing or damaged
E1 Indoor coil 2 sensor missing or damaged
E2 Return air sensor missing or damaged
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
Eb Compressor 1 gas leaking
Ec Compressor 2 gas leaking
Ed Compressor 1 indoor coil frosting
EE Networking Communication Port Error
Ef Compressor 2 indoor coil frosting
F0 Water Flow Failure Input Contact
F1 Compressor 2 low pressure failure input contact
F2 Compressor 2 high pressure failure input contact
F3 Water level failure input contact
F4 Compressor 2 overload failure input contact
F5 Compressor 1 overload failure input contact
F6 Fan overload failure input failure
F7 Water pump overload failure input contact
F8 Compressor 1 high pressure failure input contact
F9 Compressor 1 low pressure failure input contact
FA Electrical heater overload failure input contact
Fb Entering water temperature 1 failure
Fd Entering water temperature 2 failure
FE Suction temperature too low
WH25~70B/BR
Technical Training 2007Technical Training 2007
APM01CB- Single Compressor APM02D-Twin Compressor
WH PCB Board
CN4- APW04ACN6- APW04A CN1- SLM15A
CN2- SLM15A
Technical Training 2007Technical Training 2007
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
Technical Training 2007Technical Training 2007
E2 Compressor Low Pressure Protection
1. Gas Leak
2. Liquid/ Gas Valve not open
3. Cap. tube choked
Low (7 psig)
LP tripped
Technical Training 2007Technical Training 2007
E3 Compressor High Pressure Protection
HP tripped
1. Water Flow
2. Water Temp
High (470 psig)
Technical Training 2007Technical Training 2007
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
Technical Training 2007Technical Training 2007
E8 Gas Leak
Comp run 5 mins
Tin coil Tr – 3°C (Cooling)Tin 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
Technical Training 2007Technical Training 2007
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
Technical Training 2007Technical Training 2007
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
Yes
Technical Training 2007Technical Training 2007
Ec Suction Temperature too low
Tsuc < -6°CTsuc < -6°C?
Normal Operation
No
Compressor tripped
and auto-reset
Yes
Technical Training 2007Technical Training 2007
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
Technical Training 2007Technical Training 2007
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
Technical Training 2007Technical Training 2007
Eb Compressor 1 Gas Leaking
Ec Compressor 2 Gas Leaking
Comp run 5 mins
Tin coil Tr – 3°C (Cooling)Tin 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
Technical Training 2007Technical Training 2007
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
Technical Training 2007Technical Training 2007
Check whether wrong terminal connection?
EE Network Communication Port Error
Change it
Yes
Technical Training 2007Technical Training 2007
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
Technical Training 2007Technical Training 2007
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
Technical Training 2007Technical Training 2007
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
Technical Training 2007Technical Training 2007
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
Yes
Fb Entering Water Temperature 1 Failure
Technical Training 2007Technical Training 2007
FE Suction Temperature too low
Tsuc < -6°CTsuc < -6°C?
Normal Operation
No
Compressor tripped
and auto-reset
Yes
Technical Training 2007Technical Training 2007
Thank YouThank You
Top Related