Compressor Motor Lock - Daikin VRV EMERION REYQ-AATJA Service Manual

SiUS372201EB

3.38 Compressor Motor Lock

Applicable
All outdoor unit models
Models
E5
Error Code
Method of Error
Inverter PCB takes the position signal from UVW line connected between the inverter and
Detection compressor, and the error is detected when any abnormality is observed in the phase-current
waveform.
Error Decision
This error will be output when the compressor motor does not start up even in forced startup mode.
Conditions
Supposed
 Compressor lock
Causes  High differential pressure (0.5 MPa (72.5 psi) or more)
 UVW connection error
 Defective inverter PCB
 Stop valve is not opened
Troubleshooting
Part 6 Service Diagnosis
Be sure to turn off the power switch before connecting or disconnecting
Caution
connectors, or parts may be damaged.
Is the stop
valve open?
YES
Check the compressor
cable for disconnection
and flaws.
Is the
connection
line of the
compressor
normal?
YES
Power OFF
Are wire
connections
made to phases U,
V and W in the proper
order and
manner?
YES
Are wire
connections
made according to the
Wiring Diagram?
YES
A
NO
NO
NO
NO
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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