Trouble Shooting - Fisher FSAI-SU-91AE2 Service Manual

8.2 Trouble shooting

8.2.1 EEPROM parameter error diagnosis and solution(E0/F4)
Error Code
Malfunction decision
conditions
Supposed causes
Trouble shooting:
Power off, then restart the
unit 2 minutes later.
Yes
Replace the indoor/outdoor
main PCB.
EEPROM: a read-only memory whose contents can be erased and reprogrammed using a pulsed
voltage. For the location of EEPROM chip, please refer to the below photos.
Indoor PCB
Note: The two photos above are only for reference, it's may be not same totally with the ones
on your side.
E0/F4
Indoor or outdoor PCB main chip does not receive feedback
from EEPROM chip.
Installation mistake
●
PCB faulty
●
Outdoor PCB
37