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Daikin VRV III-S RXYMQ36 48PVJU Service Manual Page 102

60 hz.
Hide thumbs
SiUS34-907
Symptom
6
COOL-HEAT
The remote controller displays
selection is
UNDER CENTRALIZED
disabled.
CONTROL.
The remote controller displays
UNDER CENTRALIZED
CONTROL, and the COOL-
HEAT selection remote
controller is provided.
7
The system
This symptom occurs
conducts fan
immediately after turning ON
operation but not
the power supply.
cooling or
heating
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.
Troubleshooting
Supposed Cause
This remote controller has no option
to select cooling operation.
COOL-HEAT selection is made
using the COOL-HEAT selection
remote controller.
The system is in preparation mode
of operation.
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.
(The fan LL operation is also
enabled while in oil return mode in
cooling 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.
Symptom-based Troubleshooting
Countermeasure
Use a remote controller with option
to select cooling operation.
Use the COOL-HEAT selection
remote controller to select cool or
heat.
Wait for a period of approximately
10 minutes.
Normal operation.
Normal operation.
Clean the inside of the indoor unit.
Normal operation.
Normal operation.
93

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    RXYQ18PAY6 service manual & vrv Fulform