Daikin RQYQ140-180PY1 Service Manual page 104

R-410a heat pump 50hz and r-410a heat recovery 50hz
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Symptom-based Troubleshooting
Symptom
7
The system
This symptom occurs
conducts fan
immediately after turning ON
operation but not
the power supply.
cooling or
"UNDER CENTRALIZED
heating
CONTROL" is displayed on the
operation.
remote controller and the
cooling/heating operation
stops. The operation switches
to the air supply operation.
8
The airflow rate
Even pressing the AIRFLOW
is not
RATE SET button makes no
reproduced
changes in the airflow rate.
according to the
setting.
9
The airflow
The airflow direction is not
direction is not
corresponding to that
reproduced
displayed on the remote
according to the
controller.
setting.
The flap does not swing.
10 A white mist
<Indoor unit>
comes out from
In cooling operation, the
the system.
ambient humidity is high.
(This indoor unit is installed in
a place with much oil or dust.)
<Indoor unit>
Immediately after cooling
operation stopping, the
ambient temperature and
humidity are low.
<Indoor and outdoor units>
After the completion of
defrosting operation, the
system is switched to heating
operation.
95
Supposed Cause
The system is in preparation
mode of operation.
Even though, the cooling or
heating operation is set, the air
supply operation continues during
thermal storage operation.
"UNDER CENTRALIZED
CONTROL" is displayed on the
remote controller.
In heating operation, when the
room temperature reaches the set
degree, the outdoor unit will stop
while the indoor unit is brought to
fan LL operation so that no one
gets cold air.
Furthermore, if fan operation
mode is selected when other
indoor unit is in heating operation,
the system will be brought to fan
LL operation.
Automatic control
Uneven temperature distribution
due to heavy stain of the inside of
the indoor unit
Hot gas (refrigerant) flown in the
indoor unit results to be vapor
from the unit.
Defrosted moisture turns to be
vapor and comes out from the
units.
SiBE341001
Countermeasure
Wait for a period of approximately
10 minutes.
Normal operation.
Normal operation.
Normal operation.
Clean the inside of the indoor unit.
Normal operation.
Normal operation.
Troubleshooting

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