Daikin REYQ-AATJA, Service Manual, Page: 330 / 495

Troubleshooting by Error Code SiUS372201EA
323 Part 6 Service Diagnosis
Note(s)

1. If the filter auto clean operation mode is set to a designated time period, perform a filter auto
clean operation as described below to clear the AH error code. (If scheduled operation time is not
set, the filter auto clean operation will be performed automatically after air conditioning operation is
stopped, so the following operation is unnecessary.)
1. On the remote controller, select "Filter Auto Clean" menu. The screen will change into a
cleaning time period setting screen. Confirm the set time period. (Example: 0:00 to 3:00)
2. Select "Clock & Calendar" on the remote controller and set the current time to the time one
minute before the beginning of the time set in step 1. (Example: If the set time is from 0:00 to
3:00, set the current time to 23:59, one minute before 0:00)
3. After about 1 minute, filter auto clean operation will start. ( AH error cleared)
4. After confirming that the filter auto clean operation is finished, return the time changed in step 2
to the regular time.
NO
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
YES
Stop the air conditioning
operation and perform filter
auto clean operation (
1).
(Please set a time period
during which air conditioning
operation is stopped for about
20 minutes every day.)
Has any air
conditioning operation been
running continuously for
24 hours?
The error could be caused by
other causes. Refer to other
diagnosis flowcharts in the
following order:
AH-03 → 04 → 05 → 06 → 07 → 08.
Check the indoor unit control
PCB and self-cleaning
decoration panel PCB.
AH-09
Filter auto clean operation
start disabled error
Diagnosis Flowchart-7
YES
Stop the air conditioning
operation and perform filter
auto clean operation (
1).
(Please set a time period
during which air conditioning
operation is stopped for about
20 minutes, or set the filter
auto clean operation at a time
when air conditioning
operation is not running.)
Is any air
conditioning operation
running during the set
time period?
NO
NO
NO
YES
Remove the external factor.
Is there any
external factor other than the
error such as noise?
YES
Identify and correct the
problem.
Then stop the air conditioning
operation and perform filter
auto clean operation (
1).
Is there any
operation stop due
to an error?
YES
Deactivate the “Disable Filter
Auto Clean” via the remote
controller setting menu.
Then stop the air conditioning
operation and perform filter
auto clean operation (
1).
Is the filter auto
clean operation set to
“disabled”?
NO