Daikin BPMKS048A2U - Outdoor Unit PCB Abnormality

SiUS181305E Troubleshooting for Outdoor Unit
Troubleshooting 202
7.17 Outdoor Unit PCB Abnormality
Error Code L1
Method of Error
Detection
 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.
Error Decision
Conditions
 Overcurrent (OCP) flows during waveform output.
 Malfunction of current sensor during synchronous operation
 IPM failure
Supposed
Causes
 Defective main PCB (A1P)
 IPM failure
 Current sensor failure
 Failure of IGBT or drive circuit
Troubleshooting
Turn OFF the power supply
once and then turn it ON
again.
Does it return to
normal?
Could be other causes than
malfunction (for example,
noise etc.).
Replace the main PCB
(A1P).
(R15335)
YES
NO
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.