Daikin VRV RXYQ72-384XAYCA Service Manual page 262

Troubleshooting by Error Code
Note(s)
1. Connector
255
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Diagnosis Flowchart-1
AH-03
Transmission error between
self-cleaning decoration panel
and indoor unit
Is the connector
( 1) on the indoor unit control
PCB properly connected?
YES
Is the
connector X1A on the
self-cleaning decoration panel PCB
properly connected?
YES
Is the relay
connector between
connector ( 1) of indoor unit and
X1A of self-cleaning decoration
panel properly
connected?
YES
Is the harness broken?
NO
Is there any
external factor other than the
error such as noise?
NO
Turn OFF the power supply and
then turn it ON again. Then, start
operation with remote controller.
Error AH recurs,
or the self-cleaning decoration panel
lamp (red) blinks?
YES
Model Connector
FXFQ-AA X70A
FXFQ-T X8A
NO
NO
NO
YES
YES
NO
SiUS342004EB
Properly connect the
connector.
Properly connect the
connector.
Properly connect the
connector.
Replace the harness.
Remove the external factor.
Normal.
The error could be caused by
other causes. Refer to other
diagnosis flowcharts in the
following order:
AH-05→04→06→07→08→09.
Check the indoor unit control
PCB and self-cleaning
decoration panel PCB.
Part 6 Service Diagnosis