2.37 "Lc" Outdoor Unit; Lc" Outdoor Unit: Malfunction Of Transmission Between Inverter And Control Pc Board - Daikin RXYQ72 Serivce Manual

Troubleshooting by Indication on the Remote Controller

2.37 "LC" Outdoor Unit:

Inverter and Control PC Board
LC
Remote
Controller
Display
Applicable RXYQ72M, 96M
Models
Method of Check the communication state between inverter PC board and control PC board by micro-
computer.
Malfunction
Detection
Malfunction When the correct communication is not conducted in certain period.
Decision
Conditions
Supposed
Causes
166
Malfunction of Transmission Between
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.)
SiUS39-601
Troubleshooting