SiUS39-602
Troubleshooting by Indication on the Remote Controller
Troubleshooting
159
2.28
“
J6
”
Outdoor Unit:
Malfunction of Thermistor (R4T) for
Outdoor Unit Heat Exchanger
Remote
Controller
Display
J6
Applicable
Models
REYQ72M, 96M
Method of
Malfunction
Detection
Malfunction is detected from the temperature detected by the heat exchanger thermistor.
Malfunction
Decision
Conditions
When a short circuit or an open circuit in the heat exchange thermistor is detected.
Supposed
Causes
Defect of thermistor (R4T) for outdoor unit coil
Defect of outdoor unit PC board (A1P)
Troubleshooting
∗
1: Refer to thermistor resistance / temperature characteristics table on P.239.
(V3074)
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Resistance
is normal when
measured after
disconnecting the thermistor
R4T from the indoor
unit PC board.
(3.5k
Ω
~
360k
Ω
)
∗
1
Replace outdoor unit PC board
(A1P).
Connect the thermistor and turn
on again.
NO
NO
Replace the thermistor R4T.
YES
YES
Connector
is connected to X37A
of outdoor unit PC
board (A1P).
Summary of Contents for REYQ72
Page 35: ...Specifications SiUS39 602 24 Specifications...
Page 121: ...Field Setting SiUS39 602 110 Test Operation...
Page 129: ...Troubleshooting by Remote Controller SiUS39 602 118 Troubleshooting...
Page 225: ...Troubleshooting OP Unified ON OFF Controller SiUS39 602 214 Troubleshooting...
Page 232: ...SiUS39 602 Piping Diagrams Appendix 221 1 3 BS Unit BSVQ36MVJU BSVQ60MVJU 4D045338...
Page 235: ...Wiring Diagrams for Reference SiUS39 602 224 Appendix REYQ144 168 192MTJU C 3D050354A...
Page 240: ...SiUS39 602 Wiring Diagrams for Reference Appendix 229 2 4 BS Unit BSVQ36M 60MVJU 3D045069A...
Page 249: ...Example of Connection R 410A Type SiUS39 602 238 Appendix...
Page 255: ...Method of Replacing The Inverter s Power Transistors and Diode Modules SiUS39 602 244 Appendix...
Page 265: ...Precautions for New Refrigerant R 410A SiUS39 602 254 Precautions for New Refrigerant R 410A...
Page 269: ...SiUS39 602 iv Index...