Troubleshooting by Error Code
SiUS341802E
245
Service Diagnosis
2.51 Transmission Error between Inverter PCB and Outdoor
Unit Main PCB
Error Code
LC
Applicable
Models
All outdoor unit models
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
When 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, inverter compressor or fan motor
External factors (e.g. noise)
Failure of inverter PCB or fan PCB
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.
YES
NO
Go to the next page.
The
insulation
resistance of the relevant
inverter compressor is
not more than
100 k
Ω
.
The
insulation
resistance of the relevant
fan motor is not more
than 1 M
Ω.
Replace the compressor.
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 each outdoor
unit main PCB and each
inverter PCB securely
connected?
(
∗
1)
A
Summary of Contents for Aurora Series
Page 317: ...SiUS341802E Wiring Diagrams Appendix 304 RXLQ96 120TATJU 2D112581A ...
Page 318: ...Wiring Diagrams SiUS341802E 305 Appendix RXLQ72TAYDU 2D112582A ...
Page 319: ...SiUS341802E Wiring Diagrams Appendix 306 RXLQ96 120TAYDU 2D112583A ...
Page 331: ...SiUS341802E Wiring Diagrams Appendix 318 VAM1200GVJU 3D073270C ...
Page 332: ...Revision History Month Year Version Revised contents 04 2018 SiUS341802E First edition ...