Daikin VRV RXYQ72-384XAYCA, Service Manual

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Troubleshooting by Error Code SiUS342004EB
257 Part 6 Service Diagnosis
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(s).
NO
NO
Normal.
The error could be caused by
other causes. Refer to other
diagnosis flowcharts in the
following order:
AH-03 → 04 → 06 → 07 → 08 → 09 .
Check the indoor unit control
PCB and self-cleaning
decoration panel PCB.
AH-05
Dust collection sign error
Diagnosis Flowchart-3
YES
Clean the dirty infrared emitter
and receiver.
Is the infrared
emitter or receiver
dirty?
YES
NO
YES
Replace the harness.
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.
Are the
connectors X18A and X19A
on the infrared sensor PCB
properly connected?
Is the harness broken?
YES
Clean the dust from the inside
of dust collection port.
Is the inside of
dust collection port clogged
by dust?
NO
YES
Clean the dust from the inside
of brush unit.
Is the inside of
brush unit clogged by
dust?
NO
YES
Clean the dust from the inside
of S-shaped pipe.
Is the inside of
S-shaped pipe clogged by
dust?
NO
YES
Clean the dust from the dust
box. (This is not an error.)
Dust accumulated in
the dust box?
NO
Error AH recurs,
or the self-cleaning decoration panel
lamp (red) blinks?