Kaisai KOU-12HDN1 Service Manual page 112

Troubleshooting MLCAC-UTSM-2010-10
2. Timer lamp flashes
Timer lamp flashes at 5Hz
Judge: Indoor/outdoor unit communication is abnormal
Refer to the outdoor unit LED display E2 malfunction in the following part
3. Alarm lamp slow-flash
Indoor alarm lamps flash at 1Hz
Condenser temp. sensor or outdoor unit is malfunction
Judge 1: Condenser temp. sensor is abnormal
No
Check whether the resistance of the condenser temp. sensor is
correct according to Annex 1
Replace condenser temp. sensor
Yes
Judge 2: Outdoor unit is abnormal
Refer to the outdoor unit LED display E4、P1、P2 malfunction in the
following part
108 Outdoor Units