Lc Outdoor Unit: Malfunction Of Transmission Between Inverter And Control Pc Board - Daikin RXYQ96PYDN Service Manual

SiUS34-801A_b
LC
3.40 Outdoor Unit: Malfunction of Transmission between
Inverter and Control PC Board
LC
Remote
Controller
Display
Applicable
RXYQ72P~240PYDN, PTJU
REYQ72P~240PYDN, PTJU
Models
Method of Check the communication state between inverter PC board and control PC board by micro-
Malfunction computer.
Detection
Malfunction
When the correct communication is not conducted in certain period.
Decision
Conditions
Supposed
Causes
Troubleshooting
Malfunction of connection between the inverter PC board and outdoor main PC board
Defect of outdoor main PC board (transmission section)
Defect of inverter PC board
Defect of noise filter
Faulty fan inverter
Incorrect type of inverter PC board
Faulty inverter compressor
Faulty fan motor
External factor (noise etc.)
Troubleshooting by Indication on the Remote Controller
403