SiE39-404 Troubleshooting by Indication on the Remote Controller
Troubleshooting 213
2.36 “LC” Outdoor Unit: Malfunction of Transmission Between
Inverter and Control PC Board
Remote
Controller
Display
LC
Applicable
Models
RXYQ5~48M
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
External factor (Noise etc.)
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