Service manual

77
14
Troubleshooting
Diagnostic Procedure for Check Code
Is the wiring connection
to the communication cable
(PQ) normal?
Is the communication cable
connected to another
outdoor unit incorrectly?
Is the communication cable
connected to the central
management remote controller?
No
Yes
Yes
No
No
Yes
No
Yes
Modify communication cable.
Modify wiring of wire connector.
Is the No. of indoor units connected
to the outdoor unit normal?
Check interface P.C. board
of outdoor unit.
If defective, replace.
Check code Operation cause
1. Connection error of communication cable (PQ)
[96] between indoor and outdoor units
Consistency detection of indoor 2. Abnormal No. of connected indoor units
and outdoor addresses 3. Wiring connection error of central management
remote controller