Trouble Shooting With Error Code - Fujitsu ASU18RMLQ Service Instruction

2-2 TROUBLE SHOOTING WITH ERROR CODE

Trouble shooting 1
INDOOR UNIT Error Method:
Communication Error
(Indoor unit Remote control)
Detective Actuators:
Indoor unit controller PCB circuit
Wired Remote Control
Forecast of Cause:
1. Terminal connection abnormal 2. Wired Remote Control failure 3. Control PCB failure (AS, AR)
Check Point 1 : Check the connection of terminal
After turning off the power, check & correct the followings.
Check the connection of terminal between remote control and Indoor unit,
and check if there is a disconnection of the cable.
OK OK
Check Point 2 : Check Remote Control and Control PCB
Check Voltage at CN10 (AS type) of
CN17 (AR type)
CN14 (AU type)
>> If it is DC12V, Remote Control is failure. (
Control
>> If it is DC 0V, PCB is failure. (Check Remote Control once again) >> Replace
Main PCB is failure. (Check Remote Control once again) >> Replace
Upon correcting the removed connector or mis-wiring, reset the power.
Indicate or Display:
Refer to error code table.
Detective details:
When the indoor unit cannot receive the signal from Wired Remote
more than 10seconds after power ON, or the indoor unit cannot receive
the signal more than 1minute during normal operation.
Control
PCB. (Power supply to Remote Control)
Control
PCB is normal)
02-08
Main PCB (AU)
>> Replace Remote Control
Control
PCB (AS, AR)
Main
PCB (AU)