Fujitsu AB*G14LVTA Service Instructions Manual page 56

Trouble shooting 16
OUTDOOR UNIT Error Method:
IPM error
Detective Actuators:
Outdoor unit Main PCB
Forecast of Cause :
1. Main PCB failure
Check Point 1 : Replace Main PCB
Change Main PCB.
Indicate or Display:
Refer to error code table.
Detective details:
When the signal from FO terminal of IPM in Main PCB is "L"(=0V)
while the compressor stops.
02-19