Fujitsu AB*14LBAJ Service Instruction page 79

Trouble shooting 38
OUTDOOR UNIT Error Method:
INDOOR UNIT
Main relay welded error
Detective Actuators:
Outdoor Unit Main PCB Circuit
Main relay
Forecast of Cause :
1. Main relay
Check Point 1 : Replace Main PCB
Change Main PCB.
Indicate or Display:
Refer to error code table.
Detective details:
When the signal from the outdoor unit is input after 2min.20sec. from the
time of operation stop under the Main relay is OFF condition.
2. Main PCB failure
02-41