Indoor Unit Pcb Abnormality - Daikin H Series Service Manual

SiUS04-924_A
4.2

Indoor Unit PCB Abnormality

A1
Remote
Controller
Display
Method of
The system checks if the circuit works properly within the microcomputer of the indoor unit.
Malfunction
Detection
Malfunction
The system cannot set the internal settings.
Decision
Conditions
 Wrong models interconnected
Supposed
 Defective indoor unit PCB
Causes
 Disconnection of connector
Troubleshooting
Note: Check the following connector.
Wall Mounted Type
72
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)
Service Diagnosis