Daikin VRV RXYQ72-384XAYCA, Service Manual

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Troubleshooting by Error Code SiUS342004EB
255 Part 6 Service Diagnosis
Note(s)

1. Connector
YES
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
NO
Properly connect the
connector.
Is the connector
( 1) on the indoor unit control
PCB properly connected?
NO
NO
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.
AH-03
Transmission error between
self-cleaning decoration panel
and indoor unit
Diagnosis Flowchart-1
NO
Properly connect the
connector.
Is the
connector X1A on the
self-cleaning decoration panel PCB
properly connected?
YES
NO
Properly connect the
connector.
Is the relay
connector between
connector ( 1) of indoor unit and
X1A of self-cleaning decoration
panel properly
connected?
YES
YES
Replace the harness. Is the harness broken?
YES
YES
Remove the external factor.
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?
Model Connector
FXFQ-AA X70A
FXFQ-T X8A