Kaisai KOU-12HDN1 Service Manual page 113

MLCAC-UTSM-2010-10
4. Alarm lamp quick-flash
Alarm lamp flashes at 5Hz
Judge: Water level switch is abnormal.
Check whether the water pump can work normally
Select the cooling mode to make water pump work for a few minutes, then check
whether the system can run normally
Check whether the water drain pipe is blocked
5. Defrost lamp flashes
Defrost lamp flashes
Judge: Mode conflicts malfunction
Turn the indoor unit to heating mode or turn off the unit
Outdoor Units
Yes
No
No
Replace indoor PCB
No
Replace water pump
Yes
Trouble is solved
Yes
Solve to make the water can flow
Troubleshooting
fluently
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