Daikin R407C PLUS - Outdoor Unit: Malfunction of Transmission between Inverter and Control PC Board

Si33-105 Troubleshooting (Inverter)
Troubleshooting R407C PLUS Series Heat Recovery System 199
5.5 Outdoor Unit: Malfunction of Transmission Between
Inverter and Control PC Board
Remote
Controller
Display
LC
Supposed
Causes
!
Malfunction of connection between the inverter unit and outdoor unit PC board
!
Defect of outdoor unit PC board (transmission section)
!
Defect of inverter unit
!
Defect of noise filter (NF1)
!
Lack of phase on power supply during outdoor unit operation
!
External factor (Noise etc.)
!
Horse power setting error on outdoor unit PC board