Controller And Outdoor Unit - Fujitsu ASU18RLF Service Instructions Manual

Trouble shooting 4
OUTDOOR UNIT Error Method:
Communication Error Between

Controller And Outdoor Unit

Detective Actuators:
Outdoor unit Main PCB
Home Controller
Forecast of Cause:
1. Connection failure
Test 1 : Check the connection of terminal
Check & correct the followings.
Check the connection of terminal between Wired Remote Controller and indoor unit,
and check if there is a disconnection of the cable.
OK OK
Test 2 : Check Home Controller and Main PCB
Check Voltage at terminal 1-3 (CN93) of Main PCB.
(Power supply to Remote Control)
>> If it is DC12V, Home Controller is failure. (Main PCB is normal) >> Replace Home Controller
>> If it is DC 0V, Main PCB is failure. (Check Home Controller once again) >> Replace Main PCB
Indicate of Display:
Indoor Unit
Operation lamp : - time Flash
Timer lamp
ERROR CODE : [E : --]
Detective details:
When the home controller cannot 60sec receive the signal from
2. Home Controller failure
02-08
Outdoor Unit
A
: - time Flash
1
: Light ON
3. Main PCB failure
(SERVICE PARTS INFORMATION 10)
Monitor
B C D E F
6
: Light OFF n : n time blinking