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SiUS39-602
Troubleshooting by Indication on the Remote Controller
Troubleshooting
175
2.43
“
U1
”
Outdoor Unit: Reverse Phase, Open Phase
Remote
Controller
Display
U1
Applicable
Models
REYQ72M, 96M
Method of
Malfunction
Detection
Detection is based on the voltage in main circuit capacitor for inverter and supply voltage.
The phase of each phase are detected by reverse phase detection circuit and right phase or
reverse phase are judged.
Malfunction
Decision
Conditions
When a significant phase difference is made between phases.
Supposed
Causes
Power supply reverse phase
Power supply open phase
Defect of outdoor PC board A1P
Troubleshooting
(V2820)
Operation
is normal if one
place of power supply
line phase is
replaced.
Fix the open phase. Requires
inspection of field power supply
section.
Reverse phase
Counter measure of the problem is
completed by phase replacement.
Replace outdoor unit PC board
(A1P).
YES
YES
NO
NO
There
is an open phase
at the power supply
terminal section (X1M)
of the outdoor
unit.
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Summary of Contents for REYQ72
Page 35: ...Specifications SiUS39 602 24 Specifications...
Page 121: ...Field Setting SiUS39 602 110 Test Operation...
Page 129: ...Troubleshooting by Remote Controller SiUS39 602 118 Troubleshooting...
Page 225: ...Troubleshooting OP Unified ON OFF Controller SiUS39 602 214 Troubleshooting...
Page 232: ...SiUS39 602 Piping Diagrams Appendix 221 1 3 BS Unit BSVQ36MVJU BSVQ60MVJU 4D045338...
Page 235: ...Wiring Diagrams for Reference SiUS39 602 224 Appendix REYQ144 168 192MTJU C 3D050354A...
Page 240: ...SiUS39 602 Wiring Diagrams for Reference Appendix 229 2 4 BS Unit BSVQ36M 60MVJU 3D045069A...
Page 249: ...Example of Connection R 410A Type SiUS39 602 238 Appendix...
Page 255: ...Method of Replacing The Inverter s Power Transistors and Diode Modules SiUS39 602 244 Appendix...
Page 265: ...Precautions for New Refrigerant R 410A SiUS39 602 254 Precautions for New Refrigerant R 410A...
Page 269: ...SiUS39 602 iv Index...