Compressor Motor Lock - Daikin REYQ-XA Service Manual

SiUS371901E

3.35 Compressor Motor Lock

E5
Error Code
Applicable
All outdoor unit models
Models
Method of Error
Inverter 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
Detection
waveform.
Error Decision
This error will be output when the compressor motor does not start up even in forced startup mode.
Conditions
Supposed
Causes
Troubleshooting
Service Diagnosis
Compressor lock
High differential pressure (0.5 MPa (72.5 psi) or more)
UVW connection error
Defective inverter PCB
Stop valve is not opened
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Is the stop
valve open?
Check the compressor
cable for disconnection
and flaws.
connection
line of the
compressor
normal?
Power OFF
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?
NO
YES
Is the
NO
YES
NO
YES
NO
YES
A
Go to the next page.
Troubleshooting by Error Code
Field factor
Open the stop valve.
Replace the connection line,
and then securely connect the
connector.
Make proper wire connections.
W
U
V
Make proper wire connections.
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