Kaisai KOU-12HDN1 Service Manual page 111

MLCAC-UTSM-2010-10
1. Operation lamp flashes
Operation lamp flashes at 5Hz
Judge 1: Indoor temp. sensor is abnormal
Check whether the resistance of the evaporator temp. sensor is
correct according to Annex 1
Judge 2: Room temp. sensor is abnormal
Check whether the resistance of the room temp.
sensor is correct according to Annex 1
Outdoor Units
Yes
Yes
Replace indoor PCB
No
Replace evaporator temp. sensor
No
Replace room temp. sensor
Troubleshooting
107