Outdoor Unit Pcb Abnormality - Daikin RMXS-L Series Service Manual

SiUS181631EA

7.17 Outdoor Unit PCB Abnormality

L1
Error Code
Method of Error
Detection
Error Decision
Conditions
Supposed
Causes
Troubleshooting
Turn the power off and then
on again.
Troubleshooting
The error is detected based on the current value during waveform output before starting
compressor.
The error is detected based on the value from current sensor during synchronous operation
when starting the unit.
Overcurrent (OCP) flows during waveform output.
Malfunction of current sensor during synchronous operation
IPM failure
Defective main PCB (A1P)
•
IPM failure
•
Current sensor failure
•
Failure of IGBT or drive circuit
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
NO
Return to normal?
YES
Troubleshooting for Outdoor Unit
Replace the main PCB
(A1P).
Could be other causes than
malfunction (for example,
noise etc.).
(R22095)
245