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

SiUS181305E

7.17 Outdoor Unit PCB Abnormality

L1
Error Code
 The error is detected based on the current value during waveform output before starting
Method of Error
Detection
 The error is detected based on the value from current sensor during synchronous operation
 Overcurrent (OCP) flows during waveform output.
Error Decision
 Malfunction of current sensor during synchronous operation
Conditions
 IPM failure
 Defective main PCB (A1P)
Supposed
Causes
Troubleshooting
Turn OFF the power supply
once and then turn it ON
again.
Troubleshooting
compressor.
when starting the unit.
 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.
YES
Does it return to
normal?
NO
Troubleshooting for Outdoor Unit
Could be other causes than
malfunction (for example,
noise etc.).
Replace the main PCB
(A1P).
(R15335)
202