Daikin VRV RXYQ72-384XAYCA Service Manual page 261

SiUS342004EB
Troubleshooting
Reference
Refer to the diagnosis flowchart below.
Part 6 Service Diagnosis
Be sure to turn off the power switch before connecting or disconnecting
Caution
connectors, or parts may be damaged.
Is the
transmission between
self-cleaning decoration panel
and indoor unit
normal?
YES
Is the dust
detection sensor
normal?
YES
Is there dust
gathered around the
dust box?
NO
Is the rotation of air
filter normal?
YES
Does the
damper open and close
normally?
YES
Is filter auto
clean operation being
performed?
YES
Is there any
external noise?
NO
Error code
AH-03 Diagnosis Flowchart-1 on page 255
AH-04 Diagnosis Flowchart-2 on page 256
AH-05 Diagnosis Flowchart-3 on page 257
AH-06 Diagnosis Flowchart-4 on page 258
AH-07 Diagnosis Flowchart-5 on page 260
AH-08 Diagnosis Flowchart-6 on page 262
AH-09
Diagnosis Flowchart-7 on page 263
NO
NO
YES
NO
NO
NO
YES
Diagnosis Flowchart
Troubleshooting by Error Code
Go to Diagnosis Flowchart-1.
(Transmission error between
self-cleaning decoration panel
and indoor unit)
AH-03
Go to Diagnosis Flowchart-2.
(Dust detection sensor error)
AH-04
Go to Diagnosis Flowchart-3.
(Dust collection sign error)
AH-05
Go to Diagnosis Flowchart-4.
(Air filter rotation error)
AH-06
Go to Diagnosis Flowchart-5.
(Damper rotation error)
AH-07
Go to Diagnosis Flowchart-7.
(Filter auto clean operation
start disabled error)
AH-09
Go to Diagnosis Flowchart-6.
(Filter auto clean operation
error)
AH-08
Check the indoor unit control
PCB and self-cleaning
decoration panel PCB.
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