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SiAF332111E
Troubleshooting by Error Code
Part 6 Service Diagnosis
281
5.47 Transmission Error between Microcomputers on
Outdoor Unit Main PCB
Applicable
Models
RXQ4/5AR, RXMQ6AR
Error Code
LC
Method of Error
Detection
Check for the transmission conditions between microcomputers on 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
Connection error between microcomputers on 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
RXQ4/5AR
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
YES
NO
Replace the outdoor
unit main PCB (A1P).
Replace the compressor
(M1C).
YES
YES
NO
NO
Replace the fan motor
(M1F).
Replace the outdoor
unit main PCB (A1P).
NO
Is the outdoor
unit main PCB
damaged?
Compressor
insulation resistance is
less than
100 k
.
Fan motor
insulation resistance is
less than 1 M
.
Normal monitoring
light (green) of outdoor unit main
PCB (A1P) blinks.
YES
( )
Keep operating.
Possibly because of
sudden power failure, etc.
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...