Specifications

SiBE28-805 Troubleshooting by Indication on the Remote Controller
Troubleshooting 183
3.34
“
LC
”
Outdoor Unit: Malfunction of Transmission Between
Inverter and Control PC Board
Remote
Controller
Display
LC
Applicable
Models
CMSQ200A7, 250A7
Method of
Malfunction
Detection
Check the communication state between inverter PC board and control PC board by micro-
computer.
Malfunction
Decision
Conditions
When the correct communication is not conducted in certain period.
Supposed
Causes

Malfunction of connection between the inverter PC board and outdoor control PC board

Defect of outdoor control PC board (transmission section)

Defect of inverter PC board

Defect of noise filter

Faulty fan inverter

Incorrect type of fan inverter

Faulty compressor

Faulty fan motor