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Symptom-Based Troubleshooting
SiUS331708EA
145
Service Diagnosis
Symptom
Supposed Cause
Countermeasure
6
COOL/HEAT
selection is
disabled.
The remote controller displays
UNDER CENTRALIZED
CONTROL.
This remote controller has no option
to select cooling operation.
Use a remote controller with option
to select cooling operation.
The remote controller displays
UNDER CENTRALIZED
CONTROL
, and the COOL/
HEAT selection remote
controller is provided.
COOL/HEAT selection is made
using the COOL/HEAT selection
remote controller.
Use the COOL/HEAT selection
remote controller to select cool or
heat.
7
The system
conducts fan
operation but not
cooling or
heating
operation.
This symptom occurs
immediately after turning ON
the power supply.
The system is in preparation mode
of operation.
Wait for a period of approximately
10 minutes.
The remote controller displays
UNDER CENTRALIZED
CONTROL
; no cooling or
heating operation is performed.
Switch to fan operation.
In thermal storage operation, the
unit is set to fan operation in cooling
or heating operation, and the
remote controller shows
CENTRALIZED CONTROL
.
Normal operation.
8
The airflow rate
is not
reproduced
according to the
setting.
Even pressing the airflow rate
setting button makes no
changes in the airflow rate.
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.
Normal operation.
9
The airflow
direction is not
reproduced
according to the
setting.
The airflow direction is not
corresponding to that
displayed on the remote
controller.
The flap does not swing.
Automatic control
Normal operation.
10 A white mist
comes out from
the system.
Indoor unit
In cooling operation, the
ambient humidity is high.
(This indoor unit is installed in
a place with much oil or dust.)
Uneven temperature distribution
due to heavy stain of the inside of
the indoor unit
Clean the inside of the indoor unit.
Indoor unit
Immediately after cooling
operation stopping, the
outdoor air temperature and
humidity are low.
Hot gas (refrigerant) that has flowed
in the indoor unit results to be vapor
from the unit.
Normal operation.
Indoor and outdoor units
After the completion of defrost
operation, the system is
switched to heating operation.
Defrosted moisture turns to be
vapor and comes out from the units.
Normal operation.
Summary of Contents for RXSQ24TAVJU
Page 1: ...Service Manual SiUS331708EA RXSQ24 36 48 60TAVJU Heat Pump 60 Hz...
Page 290: ...Wiring Diagrams SiUS331708EA 277 Appendix RXSQ48TAVJU 3D109546A...
Page 291: ...SiUS331708EA Wiring Diagrams Appendix 278 RXSQ60TAVJU 3D109547A...
Page 295: ...SiUS331708EA Wiring Diagrams Appendix 282 FXZQ05 07 09 12 15 18TAVJU 3D110443A...
Page 298: ...Wiring Diagrams SiUS331708EA 285 Appendix FXEQ07 09 12 15 18 24PVJU 3D098557A...
Page 300: ...Wiring Diagrams SiUS331708EA 287 Appendix FXSQ05 07 09 12 15 18 24 30 36 48 54TAVJU 3D110467B...
Page 301: ...SiUS331708EA Wiring Diagrams Appendix 288 FXMQ07 09 12 15 18 24 30 36 48 54PBVJU 3D093209B...
Page 302: ...Wiring Diagrams SiUS331708EA 289 Appendix FXHQ12 24 36MVJU 3D048116C...
Page 303: ...SiUS331708EA Wiring Diagrams Appendix 290 FXAQ07 09 12 18 24PVJU 3D075354C...
Page 309: ...SiUS331708EA Wiring Diagrams Appendix 296 VAM1200GVJU 3D073270D...