Daikin REYQ-AATJA, Service Manual, Page: 278 / 495

Symptom-based Troubleshooting SiUS372201EA
271 Part 6 Service Diagnosis
1.4 With Infrared Presence/Floor Sensor
Error diagnosis of "Louver operation different from setting"
Condition Measure
1 "Louver operation different from setting" or "No downward
airflow in heating operation"
Refer to the flowchart below.
2 Individual airflow direction setting different from the actual
airflow direction
· Check the "Louver operation different from setting" error
diagnosis.
3 While not operating, the louver does not close completely. Turn off the circuit breaker and then turn it on again.
4
The remote controller menu does not display energy saving
operating mode for when people are not present.
Refer to Infrared Presence/Floor Sensor Error (CE) on
page 335.
The remote controller menu does not display the stop function
for when people are not present.
The remote controller menu does not display the automatic draft
prevention function.
5 The menu does not display the eco-friendly display function.
No defect.
Set the clock.
6
During cooling and dry operation, the louver automatically
switches from horizontal (P0) to one-level downward (P1).
No defect.
When relative ambient humidity is higher, automatic louver
control will be activated.
7
During heating operation, the use of an airflow block will not
cause other louvers to turn downward (P4).
No defect.
In heating operation, if an airflow block is set, then the air outlet
control outdoor the airflow block will be within the range P0-P3.
8 When using airflow block, the airflow block will be routinely lifted
(become horizontal) during heating operation.
No defect.
Set louver to horizontal (P0) during thermostat OFF.
9
The infrared presence sensor determines that there is someone
in the room while no one is there.
Check if there are any objects that generate temperature change
when moving.
For example:
· An electric heater with swing function
· Doors, curtains, blind switches
· Output of paper from a fax machine or a printer
· Turning on/off of incandescent lights
· Moving objects
10
The infrared presence sensor determines that there is no one in
the room while someone is there.
Check for the following conditions.
· Lack of movement
· Facing away from the sensor
· Little skin exposed
· Slight movement in a place far from the sensor
11
Large difference between floor temperature and actual
temperature
Check for the following conditions.
· Sensor detection zone affected by solar radiation
· High or low temperature objects in the sensor detection zone
· Large difference between floor temperature and
temperature of the living space
· Sensors installed near walls may be affected by wall
temperature.
Normal
Reset (Cancel)
individual airflow.
Is the individual
airflow set?
Is the
airflow direction set to
automatic?
Is the wire
harness broken?
YES
YES
NO
NO
NO
NO
NO
Replace the step
motor. (Motor failure)
YES
Replace the wire
harness.
YES
Is the connection
of the step motor
connector normal?
Is the
automatic draft prevention
function "enabled"?
YES
Normal
Automatic draft prevention
function switches flap to
horizontal position when
presence is detected.
Connect to the connector
correctly before action
verification.