Daikin VRV EMERION RXYQ-AATJA, Service Manual

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Troubleshooting by Error Code SiUS342303E
305 Part 6 Service Diagnosis
3.37 Compressor Motor Lock
Applicable
Models
All outdoor unit models
Error Code
E5
Method of Error
Detection
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
waveform.
Error Decision
Conditions This error will be output when the compressor motor does not start up even in forced startup mode.
Supposed
Causes

Compressor lock
 High differential pressure (0.5 MPa (72.5 psi) or more)
 UVW connection error
 Defective inverter PCB

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?
U
V
W
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 compressor
cable for disconnection
and flaws.
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