Fujitsu AU*G36LRLA Service Instruction page 54

Trouble shooting 7
INDOOR UNIT Error Method:
Primary unit, secondary unit setup error
Detective Actuators:
Indoor unit Controller PCB
Forecast of Cause :
1. Mis-wiring 2.Indoor unit address setting incorrect
Check Point 1 : Check wiring connection condition
Check wiring connection condition of all slave indoor units.
Check wiring connection condition in same refrigerant system.
>> If there is an abnormal condition, correct it by referring to Installation Manual
or Data & Technical Manual.
>> Upon correcting incorrect setting, reset the power.
OK
Check Point 2 : Check the DIP-SW of Controller PCB setting
Check the DIP-SW of controller setting.
>> If there is an abnormal condition, correct it by referring to Installation Manual
or Data & Technical Manual.
>> Upon correcting incorrect setting, reset the power.
OK
Check Point 3 : Replace Controller PCB
If Check Point 1, 2 do not improve the symptom, replace Controller PCB.
Indicate or Display:
Refer to error code table.
Detective details:
When there is no master unit in the same refrigerant system.
When 2 or more master units are connected in the same
reffigerant system.
When slave indoor unit receives serial reverse transfer signal.
When address [0] indoor unit is set as slave unit.
3. Controller PCB failure
02-09