Service manual

80
14
Troubleshooting
Diagnostic Procedure for Check Code
Check code Operation cause
1. Remote controller circuit connection error
[99]
2. Duplicated indoor No.1 units
Indoor remote controller
3. Remote controller error
communication alarm
4. Indoor P.C. board error
Are A, B, C internal
wires normal?
Is there a
connection error?
Is SW01 duplicated?
Check connection of wiring.
Avoid duplication of unit
setup to No.1.
Check indoor P.C. board.
If defective, replace.
Check indoor P.C. board.
If defective, replace.
Check remote controller P.C. board.
If defective, replace.
Set SW01 to 1.
Make unit setup No.1.
No
Yes
Yes
No
Is group operation performed?
Yes
No
Is SW01 set to No. 1 on
the master unit?
No
Yes
Does serial LED
(Green) D11 on the indoor
P.C. board flash?
Yes
No
Does serial LED
(Orange) D13 on the indoor
P.C. board flash?
Yes
No
Yes
No
Is the unit setup No.1?
No
Yes
Does the indoor unit operate?
No
Yes