Daikin FDMQ-R Series Service Manual

SiUS091601EA Troubleshooting for FTX, FVXS Series
Part 6 Service Diagnosis 124
5. Troubleshooting for FTX, FVXS Series
5.1 Indoor Unit PCB Abnormality
Error Code A1
Method of Error
Detection
The system checks if the circuit works properly within the microcomputer of the indoor unit.
Error Decision
Conditions
The system cannot set the internal settings.
Supposed
Causes
 Wrong models interconnected
 Defective indoor unit PCB
 Disconnection of connector
 Reduction of power supply voltage
Troubleshooting
Correct the connection.
OK?
Check the power supply
voltage.
Start operation.
Voltage as rated?
Error repeats?
Check the power supply
voltage.
Start operation.
Voltage as rated?
Error repeats?
Error repeats?
Combination of the
indoor and outdoor unit
matched?
Check the connection of
connectors. ★
YES
NO
NO
YES
NO
NO
YES
(R23407)
Caution
* To secure the connection,
disconnect the connectors once
and then reconnect.
YES
NO
YES
NO
YES
NO
YES
Match the compatible
models.
Correct the power
supply.
Replace the indoor unit
PCB (control PCB).
Completed.
Completed.
Correct the power
supply.
Replace the indoor unit
PCB (control PCB).
Completed.
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.

Daikin FDMQ-R Series Specifications

General

Brand	Daikin
Model	FDMQ-R Series
Category	Air Conditioner
Language	English