Indoor Unit Pcb Abnormality - Daikin SUPER MULTI NX G Series Service Manual

Troubleshooting
5.3

Indoor Unit PCB Abnormality

A1
Remote
Controller
Display
Method of
Evaluation of zero-cross detection of power supply by the indoor unit PCB.
Malfunction
Detection
Malfunction
There is no zero-cross detection in approximately 10 seconds.
Decision
Conditions
 Wrong models interconnected
Supposed
 Defective indoor unit PCB
Causes
 Disconnection of connector
Troubleshooting
Note: Check the following connector.
Duct-free system
Slim duct built-in system
103
Be sure to turn off the power switch before connecting or disconnecting
Caution
connectors, or parts may be damaged.
Check the combination of the
indoor and outdoor unit.
OK?
YES
Check the connection of
connectors (See Note.).
OK?
NO
Correct the connection.
Error repeats?
NO
Model Type
NO
* To secure the connection,
once disconnect the connector
and then reconnect it.
YES
YES
Connector
Terminal board ~ Control PCB
Terminal board ~ Control PCB
SiUS12-928_A
Match the compatible
models.
Replace the indoor unit
PCB.
Replace the indoor unit
PCB.
Completed.
(R11930)
Service Diagnosis