SiUS372201EB
Troubleshooting by Error Code
Part 6 Service Diagnosis
416
3.66 Power Supply Insufficient or Instantaneous Abnormality
Applicable
Models
All outdoor unit models
Error Code
U2
Method of Error
Detection
Detect the voltage of capacitor of the main circuit in the inverter PCB.
Error Decision
Conditions
When the voltage in the DC circuit (between diode module and power module) falls below 190 VDC
(for 208/230 V models) or 380 VDC (for 460 V models).
Supposed
Causes
Abnormal power supply voltage
Instantaneous power failure
Open phase
Defective inverter PCB
Defective outdoor unit main PCB
Defective compressor
Defective main circuit wiring
Defective fan motor
Defective connection of signal cable
Troubleshooting
There are
some defects in the
power supply conditions
aforementioned.
The insulation
resistance of the
compressor is less than
100 k
.
NO
YES
YES
Fix the defects.
Replace the compressor.
Check for power supply
conditions.
(1) Power supply voltage falls
within ±10% of the rated
voltage?
(2) Any open phase in the
power supply wiring or any
wrong wiring?
(3) Imbalance in the power
supply voltage is
maintained within 12 V?
A
NO
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Go to the next page.
Содержание VRV EMERION REYQ-AATJA
Страница 1: ...Service Manual Heat Recovery 60 Hz REYQ AATJA B 208 230 V REYQ AAYDA B 460 V SiUS372201EB...
Страница 458: ...Check SiUS372201EB 451 Part 6 Service Diagnosis Reference Reference CHECK 7 Refer to page 457 CHECK 8 Refer to page 458...
Страница 490: ...Wiring Diagrams SiUS372201EB 483 Part 7 Appendix 1 2 2 Multi Branch Selector Unit Standard Series BS4Q54TVJ 3D089123B...
Страница 492: ...Wiring Diagrams SiUS372201EB 485 Part 7 Appendix BS6 8Q54TVJ 2D089122B...
Страница 493: ...SiUS372201EB Wiring Diagrams Part 7 Appendix 486 BS10 12Q54TVJ 2D089121B...
Страница 499: ...SiUS372201EB Wiring Diagrams Part 7 Appendix 492 FXFQ07 09 12 15 18 24 30 36 48TVJU 3D086460B...
Страница 500: ...Wiring Diagrams SiUS372201EB 493 Part 7 Appendix BYCQ125BGW1 Self Cleaning Decoration Panel for FXFQ TVJU 3D076375A...
Страница 501: ...SiUS372201EB Wiring Diagrams Part 7 Appendix 494 FXZQ05 07 09 12 15 18TAVJU 3D110443A...
Страница 505: ...SiUS372201EB Wiring Diagrams Part 7 Appendix 498 FXEQ07 09 12 15 18 24PVJU 3D098557A...
Страница 506: ...Wiring Diagrams SiUS372201EB 499 Part 7 Appendix FXDQ07 09 12 18 24MVJU C 3D050501C...
Страница 507: ...SiUS372201EB Wiring Diagrams Part 7 Appendix 500 FXSQ05 07 09 12 15 18 24 30 36 48 54TAVJU C 3D110467C...
Страница 509: ...SiUS372201EB Wiring Diagrams Part 7 Appendix 502 FXMQ07 09 12 15 18 24 30 36 48 54PBVJU 3D093209B...
Страница 513: ...SiUS372201EB Wiring Diagrams Part 7 Appendix 506 FXHQ12 24 36MVJU 3D048116C...
Страница 514: ...Wiring Diagrams SiUS372201EB 507 Part 7 Appendix FXAQ07 09 12 18 24PVJU 3D075354F...
Страница 521: ...SiUS372201EB Wiring Diagrams Part 7 Appendix 514 VAM1200GVJU 3D073270D...