Fujitsu ASU18RLF Service Instructions Manual page 51

Trouble shooting 7
INDOOR UNIT Error Method:
Manual Auto Switch Error
Detective Actuators:
Indoor unit controller PCB
Indicator PCB
Manual auto switch
Forecast of Cause:
1. Manual Auto Switch failure
Test 1 : Check the Manual Auto Switch
Check if Manual Auto Switch is kept pressed.
Check ON/OFF switching operation by using a meter.
>> If Manual Auto Switch is disabled (on/off switching), replace it.
OK OK
Test 2 : Replace Controller PCB and Indicator PCB
If Test 1 do not improve the symptom, replace Controller PCB and Indicator PCB.
Indicate of Display:
Indoor Unit
Operation lamp : 3 time Flash
Timer lamp : 5 time Flash
ERROR CODE : [E : 35]
Detective details:
When the Manual Auto Switch becomes ON for consecutive
60 seconds or more.
2. Controller PCB and Indicator PCB failure
02-11
Outdoor Unit
Monitor
A B C D E
: Light ON : Light OFF n : n time blinking
F