118
Troubleshooting
Self Diagnostic Table – W2 Board
Fault Indication COOL LED
Error
Code
Action
Room sensor error (short/open) Blink 1 time E1
Check room sensor
connection/change room air
sensor
Pipe water sensor error (short/open) Blink 2 times E2
Check pipe water sensor
connection/change pipe
water sensor
Water pump error Blink 6 times E6
Clear the clogging at drain
pipe. If pump is not working,
change the pump
Pipe water temperature fault Blink 5 times E5
Check chiller condition
(not working or just started)
Window open activated* Blink 3 times - -
Antifreeze mode activated* Blink 7 times - -
Load shedding activated* Blink 8 times - -
*Applicable for 4 pipes applications only.
Self Diagnostic Table – W3 Board
Event Power LED Timer LED Error Code
1. Room Sensor Open or Short Blink 1 time - Blink E1
2. Pipe Water sensor Open or Short Blink 2 times - Blink E2
3. Pipe Water Temperature poor Blink 3 times - Blink E4
4. Pipe Water Temperature bad/fault - Blink 1 time Blink E5
5. Water Pump Fault - Blink 2 times Blink E6
6.
Hardware Error (tact switch pin Short/M3 or M4
Mode with valveless section)
- Blink 6 times Blink E8
7. Window Open activated* Blink 6 times - -
8. Antifreeze mode activated* Blink 7 times - -
9. Load Shedding activated* Blink 8 times - -
*Only applicable for 4-pipes system.
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