SiAF332111E
Troubleshooting by Error Code
Part 6 Service Diagnosis
271
5.43.3 Radiation Fin Temperature Rise Abnormality (10/12 HP Models)
Applicable
Models
RXMQ10/12AR
Error Code
L4
Method of Error
Detection
Use the thermistor to test the radiation fin temperature of the inverter PCB of the compressor.
Error Decision
Conditions
Error is determined when the PCB circuit thermistor detects a temperature higher than the
designed temperature.
Supposed
Causes
Insulation sheet (pale blue) does not cover the entire radiator.
Radiation fin is not fixed with fixing screws.
U0
error
Defective inverter PCB
Outdoor temperature too high
Troubleshooting
NO
Is it normal?
Resolve the error.
YES
YES
NO
Replace the inverter PCB (A3P).
Keep operating.
Possibly related to on-site causes
such as increased radiating plate
temperature due to high outdoor
temperature.
Check the cooling condition of the radiation fin
for inverter cooling.
(1) Is the radiation fin well covered by the
insulating sheet (pale blue)?
(2) Is the radiation fin fixed by fixing screws?
(3) Does the error history display the error code
U0
?
Does an
error occur after
connecting to the power and
starting operation?
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Summary of Contents for VRV S RXMQ10ARY1
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...