Fujitsu AU*G36LRLA Service Instruction page 64

Trouble shooting 17
OUTDOOR UNIT Error Method:
Trip terminal L error
Detective Actuators:
Outdoor unit Inverter PCB
Forecast of Cause :
1. Inverter PCB failure
Check Point 1 : Replace Inverter PCB
Change Inverter PCB.
Indicate or Display:
Refer to error code table.
Detective details:
When the signal from FO terminal of IPM in Inverter PCB is "L"(=0V)
while the compressor stops.
02-19