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SiUS281811EA
Troubleshooting by Error Codes
Part 6 Service Diagnosis
241
Note(s)
Reference
4.21 Thermistor Abnormality
Error Code
C4, C5, C9, CA
Applicable
Models
C4, C5
: All indoor units
C9
: except FTQ-TA models
CA
: FBQ-P models only
Method of Error
Detection
The error is determined by the temperature detected by the thermistor.
Error Decision
Conditions
The thermistor becomes disconnected or shorted while the unit is running.
Supposed
Causes
Defective thermistor
Defective indoor unit PCB
Defective connector connection
Broken or disconnected wire
Troubleshooting
∗
1. Error code and thermistor
∗
C9
for FTQ-TA models.
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.
Remove the thermistor from
the indoor unit PCB. Then,
insert the connector again.
Remove the thermistor from
the indoor unit PCB, and then
make resistance measurement
of the thermistor using a
multimeter.
CHECK 11
Normal (The error is caused by
defective contact.)
YES
NO
Replace the indoor unit main
PCB (A1P).
YES
Replace the thermistor (
1).
NO
Is the thermistor
normal?
Normal?
Error Code
Thermistor
FCQ-TA
FHQ-P
FHQ-M
FAQ-TA
FBQ-P
FTQ-TA
C4
Heat exchanger liquid pipe thermistor
R2T
R2T
R2T
C5
Heat exchanger gas pipe thermistor
R3T
R3T
R3T
C9
Suction air thermistor
R1T
R1T
∗
2
CA
Discharge air thermistor
—
R4T
—
Содержание SkyAir RZR-TA Series
Страница 1: ...Service Manual Cooling Only 60 Hz Heat Pump 60 Hz RZR TA RZQ TA Series SiUS281811EA...
Страница 202: ...SiUS281811EA 196 Part 6 Service Diagnosis 5 15 Fan Motor Connector Check for FTQ TA 311...
Страница 321: ...SiUS281811EA 315 Part 7 Appendix 1 Wiring Diagrams 316 1 1 Outdoor Unit 316 1 2 Indoor Unit 320 Part 7 Appendix...
Страница 322: ...Wiring Diagrams SiUS281811EA 316 Part 7 Appendix 1 Wiring Diagrams 1 1 Outdoor Unit RZR18 24TAVJU RZQ18 24TAVJU 3D115455...
Страница 323: ...SiUS281811EA Wiring Diagrams Part 7 Appendix 317 RZR18 24TAVJUA RZQ18 24TAVJUA 3D124495...
Страница 324: ...Wiring Diagrams SiUS281811EA 318 Part 7 Appendix RZR30 36 42 48TAVJU RZQ30 36 42 48TAVJU 3D115456...
Страница 325: ...SiUS281811EA Wiring Diagrams Part 7 Appendix 319 RZR30 36 42 48TAVJUA RZQ30 36 42 48TAVJUA 3D124500...
Страница 326: ...Wiring Diagrams SiUS281811EA 320 Part 7 Appendix 1 2 Indoor Unit FCQ18 24 30 36 42 48TAVJU 3D115647A...
Страница 327: ...SiUS281811EA Wiring Diagrams Part 7 Appendix 321 FHQ18 24 30PVJU FHQ36 42MVJU 3D048116C...
Страница 328: ...Wiring Diagrams SiUS281811EA 322 Part 7 Appendix FAQ18 24TAVJU 3D114844B...
Страница 329: ...SiUS281811EA Wiring Diagrams Part 7 Appendix 323 FBQ18 24 30 36 42 48PVJU 3D065984J...