Pcb (For Inverter Compressor) Abnormality - Daikin RXSQ24TAVJU Service Manual

Troubleshooting by Error Code

4.40 PCB (for Inverter Compressor) Abnormality

L1
Error Code
Applicable
All outdoor units
Models
Method of Error
Error is detected based on the current value during waveform output before starting compressor.
Detection Error is detected based on the value from current sensor during synchronous operation when
starting the unit.
Error Decision
Overcurrent (OCP) flows during waveform output.
Conditions Error of current sensor during synchronous operation.
IPM failure.
Supposed
Causes
Troubleshooting
213
IPM failure
Current sensor failure
Drive circuit failure
Be sure to turn off the power switch before connecting or disconnecting
Caution
connectors, or parts may be damaged.
Turn off the power. Then,
turn on the power again.
Does the power
supply normally come
back on?
NO
YES
SiUS331708EA
It is supposed that the error results
from external causes other than
failures (e.g. exogenous noises or
thunder).
Replace the outdoor main PCB
(A1P).
Service Diagnosis