Fujitsu ASU30RLE Service Instruction page 42

Trouble shooting 3
INDOOR UNIT Error Method:
Wired Remote Controller
Communication Error
Detective Actuators:
Indoor unit controller PCB
Wired remote controller
Forecast of Cause:
1. Connection failure
Test 1 : Check the connection of terminal
Check & correct the followings.
Check the connection of terminal berween Wired Remote Controller and indoor unit,
and check if there is a disconnection of the cable.
OK
Test 2 : Check Wired Remote Controller and Controller PCB
Ceck Voltage at CN12 of Controller PCB. (terminal 1-2)
(Power supply to Remote Control)
>> If it is DC12V, Remote Control is failure. (Controller PCB is normal)
>> If it is DC 0V, Controller PCB is failure.
Indicate of Display:
Indoor Unit :
Operation lamp: 1 times Flash,
Timer lamp
ERROR CODE : [E : 12]
Detective details:
When the indoor unit cannot properly receive the signal from
wired remote controller for 1 minutes or more.
2. Wired Remote Controller failure
(Check Remote Control once again) >> Replace Controller PCB
Outdoor unit :
POWER
MODE
: 2 times Flash
: Light OFF
3. Controller PCB failure
02-06
PUMP LOW
DOWN NOISE
ERROR
(L1) (L2) (L3) (L4)
5 15
2
: Light ON n : n times blinking
>> Replace Remote Control
PEAK
CUT
(L5) (L6)