Troubleshooting for Outdoor Unit SiBE18-821_C
402 Troubleshooting
7.17 Outdoor Unit PCB Abnormality
Remote
Controller
Display
L1
Method of
Malfunction
Detection
îš„
The error is detected based on the current value during waveform output before starting
compressor.
îš„
The error is detected based on the value from current sensor during synchronous operation
when starting the unit.
Malfunction
Decision
Conditions
îš„
Overcurrent (OCP) flows during waveform output.
îš„
Malfunction of current sensor during synchronous operation
îš„
IPM failure
Supposed
Causes
îš„
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
normally?
External factors (noise,
etc.) other than
malfunction.
Replace the main PCB
(A1P).
(R13035)
YES
NO
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
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