Indoor Unit Pcb Abnormality - Daikin C-Series Service Manual

SiBE07-618_C
4.2

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
Supposed
Causes
Troubleshooting
Note: Check the following connector.
Duct connected type
Service Diagnosis
Wrong models interconnected
Defective indoor unit PCB
Disconnection of connector
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
Troubleshooting
Match the compatible
models.
Replace the indoor unit
PCB (1).
Replace the indoor unit
PCB (1).
Completed.
(R11704)
61