L1" Outdoor Unit; Malfunction Of Pc Board; L1" Outdoor Unit: Malfunction Of Pc Board - Daikin RXYSQ4-5-6PA7V1B Service Manual

Troubleshooting by Indication on the Remote Controller
L1
3.34 " " Outdoor Unit:
L1
Remote
Controller
Display
Applicable RXYSQ4~6PA
Models
Method of
Malfunction
Detection
Malfunction
Decision
Conditions
Supposed
Causes
Troubleshooting
182

Malfunction of PC Board

Detect malfunctions by current value during waveform output before compressor startup.
Detect malfunctions by current sensor value during synchronized operation at the time of
startup.
In case of overcurrent (OCP) during waveform output
When the current sensor malfunctions during synchronized operation
In case of IGBT malfunction
Faulty outdoor PC board (A1P)
•
IPM failure
•
Current sensor failure
•
Failure of IGBT or drive circuit
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
Turn OFF the power
supply once and then turn
it ON again.
Does
it return normally?
NO
YES
SiBE34-802
It is believed that
external factors (noise,
etc.) other than failure
caused the malfunction.
Replace the outdoor PC
board (A1P).
( )
PC board equipped with
a resin case
Troubleshooting