Daikin FTXN25L Service Manual page 49

Service Diagnosis
Description OUTDOOR PCB ABNORMALITY
Possible Root 1. Micro Controller program run-away due to external factor such as Noise, Momentary voltage
cause
2. Damage of EEPROM.
3. Faulty outdoor unit PCB.
4. Broken hardness between PCB.
Troubleshooting
41
drop, Momentary power failure.
Turn on the power again.
Error still
occur?
Yes
Check if the outdoor unit is
grounded.
Grounded?
Yes
Is the harness
broken?
Yes
Replace the harness.
E1
No
No
No
Replace outdoor PCB.
Ground the system.
Replace outdoor PCB.