SiAF332111E Troubleshooting by Error Code
Part 6 Service Diagnosis 237
5.27 Compressor Motor Lock
Applicable
Models
All outdoor unit models
Error Code E5
Method of Error
Detection
Outdoor unit PCB takes the position signal from UVW line connected between the inverter and
compressor, and the error is detected when any abnormality is observed in the phase-current
waveform.
Error Decision
Conditions
When the compressor motor does not operate even by starting it in forced startup mode.
Supposed
Causes
Compressor lock
High differential pressure (0.5 MPa or more)
UVW connection error
Defective inverter circuit
The stop valve is not opened.
Troubleshooting
Make proper wire connections.
Make proper wire connections.
NO
NO
NO
NO
YES
YES
YES
YES
Power OFF
Is the
connection line
of the compressor
normal?
Are wire
connections
made to phases U, V
and W in the proper
order and
manner?
Are wire
connections
made according
to the wiring
diagram?
Is the stop
valve open?
Replace the connection line,
and then securely connect the
connector.
Field factor
Open the stop valve.
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
A
Check the connection wiring for
compressor M1C.
U
V
W
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