SiBE041012
Troubleshooting
Service Diagnosis
73
4.2
Indoor Unit PCB Abnormality
Remote
Controller
Display
A1
Method of
Malfunction
Detection
The system checks if the circuit works properly within the microcomputer of the indoor unit.
Malfunction
Decision
Conditions
The system cannot set the internal settings.
Supposed
Causes
Wrong models interconnected
Defective indoor unit PCB
Disconnection of connector
Troubleshooting
Note:
Check the following connector.
Check the combination of the
indoor and outdoor unit.
OK?
Check the connection of
connectors (See Note.).
Correct the connection.
OK?
Error repeats?
YES
NO
NO
YES
NO
YES
(R11704)
Caution
* To secure the connection,
once disconnect the connector
and then reconnect it.
Match the compatible
models.
Replace the indoor unit
PCB (1).
Replace the indoor unit
PCB (1).
Completed.
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Model Type
Connector
Wall Mounted Type
Terminal board ~ Control PCB
