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SiUS281811EA
Troubleshooting by Error Codes
Part 6 Service Diagnosis
279
4.49 Check Operation Not Executed
Error Code
U3
Applicable
Models
All outdoor units
Method of Error
Detection
Determined based on whether check operation is executed or not
Error Decision
Conditions
Error is decided when the unit starts operation without check operation.
Supposed
Causes
Check operation not executed
Troubleshooting
Replace the outdoor main PCB (A1P).
Press
TEST (BS4)
button on
master outdoor unit PCB for 5
seconds or longer to check
operation.
Has the check
operation performed
on outdoor unit
PCB?
NO
YES
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
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...