SiAF332111E
Troubleshooting by Error Code
Part 6 Service Diagnosis
283
5.48 Transmission Error between Inverter PCB and Outdoor
Unit Main PCB
Applicable
Models
RXMQ8-12AR
Error Code
LC
Method of Error
Detection
Check for the transmission conditions between the inverter PCB and the outdoor unit main PCB
using a microcomputer.
Error Decision
Conditions
Normal transmission is disabled for a given period of time or more.
Supposed
Causes
Defective connection between the inverter PCB and the outdoor unit main PCB
Defective outdoor unit main PCB (transmission block)
Defective noise filter
External factors (e.g. noise)
Defective compressor
Defective fan motor
Troubleshooting
Does the
inverter PCB part No.
match that of the spare
parts list?
Replace with a proper PCB.
NO
Properly connect the connector.
NO
YES
Replace the fan motor (
2).
YES
NO
The insulation
resistance of the
compressor is less
than 100 k
.
The insulation
resistance of the fan motor
(
2) is less than
1 M
Replace the compressor (M1C).
YES
NO
YES
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Is the
connector
between outdoor unit
main PCB and inverter PCB
securely connected?
(
1)
A
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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...