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Troubleshooting by Error Code
SiAF332111E
278
Part 6 Service Diagnosis
5.46 Compressor Startup Abnormality
5.46.1 Compressor Startup Abnormality (4/5 HP Models)
Applicable
Models
RXQ4/5AR
Error Code
L9
Method of Error
Detection
Error is detected by the power transistor current.
Error Decision
Conditions
Compressor overload during activation
Supposed
Causes
Defective compressor
Large pressure difference before starting the compressor
Defective outdoor unit main PCB
Troubleshooting
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
NO
NO
NO
YES
YES
YES
Does
L9
blink after
reconnecting to the power?
When
operation starts, is the high
and low pressure difference greater
than 0.2 MPa?
Unbalanced
inverter output voltage (±5 V
is normal). After stabilizing the inverter,
is the inverter output pressure
measurable?
Disconnect the compressor from the
inverter. Use power transistor to check
codes based on maintenance codes.
Nonconforming pressure
balance. Check the
refrigerant system.
Replace the outdoor unit
main PCB (A1P).
Reset and then restart
the unit.
Check the compressor according to
diagnosis procedure for compressor
abnormal noises/vibrations and
operation conditions.
Summary of Contents for VRV S RXQ4/5ARV1
Page 1: ...Service Manual Cooling Only 50 60 Hz RXQ4 5ARV1 RXMQ6ARV1 RXMQ8 10 12ARY1 SiAF332111E...
Page 369: ...SiAF332111E Wiring Diagrams Part 7 Appendix 363 RXMQ6ARV1 C 3D137051...
Page 370: ...Wiring Diagrams SiAF332111E 364 Part 7 Appendix RXMQ8ARY1 C 3D137060...
Page 371: ...SiAF332111E Wiring Diagrams Part 7 Appendix 365 RXMQ10 12ARY1 3D121610B...
Page 375: ...SiAF332111E Wiring Diagrams Part 7 Appendix 369 FXMQ40 50 63 80 100ARV1 3D127112 04 59...