Midea MFA-12HRN1 General Information Manual page 32

Troubleshooting
2. Defrosting lamp flash at 5Hz
Defrosting lamp flash at 5Hz
Judge: Evaporator temp. sensor checking channel is abnormal
Validate: Check whether the resistance of the evaporator
temp. sensor is correct according to Annex 1
Replace the indoor main board
3. Running lamp, Timer lamp, Defrosting lamp all flash at 5Hz
Running lamp, Timer lamp, Defrosting lamp all flash at 5Hz
Judge: Condenser temp. sensor checking channel is abnormal
Validate: Check whether the resistance of the condenser
temp. sensor is correct according to Annex 1
Replace the PCB
30
Yes
Yes
No
Replace the evaporator temp. sensor
No
Replace the condenser temp. sensor
MCAC-UTSM-2009-03
Outdoor Units