Fujitsu ASU18RLF Service Instructions Manual page 99

SERVICE PARTS INFORMATION 10
CAUTION of if the replace
Main PCB(Outdoor unit)
If you are replace the Main PCB of the outdoor unit, please do the following things!
After the replaced Main PCB, normal operation is not possibility.
Test 1 : Check the SERVICE LAVEL of the outdoor unit
Repair history have been described on the service label?
(refer to Fig.1)
NO
Test 2 : Check the LED of the Main PCB
Is LED lights on the Main PCB?
NO
Test 3 : Replace Main PCB
Replace Main PCB.
After the Main PCB replaced,
Please make sure the cool air comes out
by TEST RUN(cooling) operation.
or
After the Main PCB replaced,
CHECK RUN operation again,
please do the automatic correction.
Example ) when the 4 indoor units are connected
SERVICE LAVEL
Fig.1 :
Repair history (Ex.)
Reverse connection of Terminal B and Terminal C.
CAUTION
YES
Test 3 : Re-display CHECK RUN result
YES
IIs the wiring there is a mistake?
(refer to Fig.2)
Test 4 : Replace Main PCB
Replace Main PCB.
Test 2 : It is automatic correction by CHECK RUN operation.
Replace Main PCB.
After the Main PCB replaced,
CHECK RUN operation again,
please do the automatic correction.
After the Main PCB replaced,
Please Correct the wiring
by Repair history.
Fig.2 : Display of CHECK RUN operation
Check results (Ex.)
POWER ERROR
MODE
(2-blink)
Reverse connection of Terminal B and Terminal C.
01-59
NO
or
MONITOR
A B C D E F
(7 sec.)
(7 sec.)
(7 sec.)
(7 sec.)
YES