SiUS341802E
Troubleshooting by Error Code
Service Diagnosis
254
2.57 Reverse Phase, Open Phase
2.57.1 Reverse Phase, Open Phase (Except RXLQ72TAYDU)
Error Code
U1
Applicable
Models
RXLQ72-120TATJU, RXLQ96/120TAYDU, RXLQ72-120TAYCU, RXYQ72-168TAYCU
Method of Error
Detection
The phase of each phase are detected by reverse phase detection circuit and right phase or
reverse phase are judged.
Error Decision
Conditions
When a power supply is reverse phase, or T phase is open phase.
Supposed
Causes
Power supply reverse phase
T phase open phase
Defective outdoor unit main PCB (A1P)
Troubleshooting
There
is an open
phase at the power
supply (T phase) terminal
section (X1M) of the
outdoor unit.
Operation
is normal if one
phase of power supply
line phase is
replaced.
Fix the open phase. Requires
inspection of field power supply
section.
Reverse phase.
Countermeasure of the problem is
completed by phase replacement.
Replace the outdoor unit main
PCB (A1P).
YES
YES
NO
NO
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Содержание Aurora Series
Страница 316: ...Wiring Diagrams SiUS341802E 303 Appendix 1 Wiring Diagrams 1 1 Outdoor Unit RXLQ72TATJU 2D112580A ...
Страница 317: ...SiUS341802E Wiring Diagrams Appendix 304 RXLQ96 120TATJU 2D112581A ...
Страница 318: ...Wiring Diagrams SiUS341802E 305 Appendix RXLQ72TAYDU 2D112582A ...
Страница 319: ...SiUS341802E Wiring Diagrams Appendix 306 RXLQ96 120TAYDU 2D112583A ...
Страница 320: ...Wiring Diagrams SiUS341802E 307 Appendix RXLQ72 96 120TAYCU RXYQ72 96 120 144 168TAYCU 2D112579A ...
Страница 330: ...Wiring Diagrams SiUS341802E 317 Appendix 1 3 2 Energy Recovery Ventilator VAM Series VAM300 470 600GVJU 3D073269C ...
Страница 331: ...SiUS341802E Wiring Diagrams Appendix 318 VAM1200GVJU 3D073270C ...
Страница 332: ...Revision History Month Year Version Revised contents 04 2018 SiUS341802E First edition ...