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Troubleshooting by Indication on the Remote Controller
SiUS39-602
172
Troubleshooting
2.40
“
P4
”
Outdoor Unit:
Malfunction of Inverter Radiating Fin
Temperature Rise Sensor
Remote
Controller
Display
P4
Applicable
Models
REYQ72M, 96M
Method of
Malfunction
Detection
Resistance of radiation fin thermistor is detected when the compressor is not operating.
Malfunction
Decision
Conditions
When the resistance value of thermistor becomes a value equivalent to open or short circuited
status.
Malfunction is not decided while the unit operation is continued.
"P4" will be displayed by pressing the inspection button.
Supposed
Causes
Defect of radiator fin temperature sensor
Defect of inverter PC board
Troubleshooting
∗
1: Refer to thermistor resistance / temperature characteristics table on P.239.
(V2818)
After resetting, restart.
YES
YES
Is the
resistance of thermistor
correct?
∗
1
Is the resetting possible?
Replace inverter PC board.
(Thermistor can not be removed
from inverter PC board)
Measure the resistance of
radiation fin thermistor.
NO
Replace inverter PC board.
NO
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
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...