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Troubleshooting by Error Codes
SiUS281811EA
274
Part 6 Service Diagnosis
Reference
4.46 Radiation Fin Thermistor Abnormality
Error Code
P4
Applicable
Models
All outdoor units
Method of Error
Detection
Resistance of the following thermistor is detected when the compressor is not operating.
(1) Radiation fin thermistor
(2) PCB circuit thermistor
Error Decision
Conditions
When the resistance value of thermistor becomes a value equivalent to open circuited or short
circuited status
∗
Error is not decided while the unit operation is continued.
P4
will be displayed by pressing the inspection button.
Supposed
Causes
Defective radiation fin temperature thermistor
Defective PCB
Defective inverter compressor
Defective fan motor
Troubleshooting
CHECK 11
Refer to page 301.
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Is the thermistor
resistance value normal?
Replace the outdoor
main PCB (A1P).
NO
YES
NO
NO
YES
NO
Measure resistance value of
the radiation fin thermistor.
Replace the fan motor.
Replace the outdoor
main PCB (A1P).
Continue the operation.
Replace the
compressor (M1C).
YES
YES
* Disconnect the connector (X111A) from the radiation
fin thermistor, and then check the thermistor.
CHECK 11
The
compressor's insulation
resistance is less than
100 k
:
.
The fan motor's
insulation resistance is less
than 1 M
:
.
Does the error
recur when the
power supply turns
ON?
Summary of Contents for SkyAir RZR-TA Series
Page 1: ...Service Manual Cooling Only 60 Hz Heat Pump 60 Hz RZR TA RZQ TA Series SiUS281811EA...
Page 202: ...SiUS281811EA 196 Part 6 Service Diagnosis 5 15 Fan Motor Connector Check for FTQ TA 311...
Page 323: ...SiUS281811EA Wiring Diagrams Part 7 Appendix 317 RZR18 24TAVJUA RZQ18 24TAVJUA 3D124495...
Page 327: ...SiUS281811EA Wiring Diagrams Part 7 Appendix 321 FHQ18 24 30PVJU FHQ36 42MVJU 3D048116C...
Page 328: ...Wiring Diagrams SiUS281811EA 322 Part 7 Appendix FAQ18 24TAVJU 3D114844B...
Page 329: ...SiUS281811EA Wiring Diagrams Part 7 Appendix 323 FBQ18 24 30 36 42 48PVJU 3D065984J...