Fujitsu AU*G36LRLA Service Instruction page 62

Trouble shooting 15
OUTDOOR UNIT Error Method:
Inverter error
Detective Actuators:
Outdoor unit Main PCB
Outdoor unit Inverter PCB
Forecast of Cause :
1. Connection failure
Check Point 1 : Check connections in control unit
Check if the terminal connection is loose.
Check if connector is removed.
Check if connector is erroneous connection.
Check if cable is open.
>> Upon correcting the removed connector or mis-wiring, reset the power.
OK
Check Point 2 : Replace Main PCB and Inverter PCB
If Check Point 1 do not improve the symptom, replace Main PCB and Inverter PCB.
Indicate or Display:
Refer to error code table.
Detective details:
When there is communication error between Main PCB
and Inverter PCB.
When "Inverter PCB cement resistor difference voltage between
both ends" detects 18 V and above twice continuously.
2. Main PCB failure 3. Inverter PCB failure
02-17