Daikin RXYQ-TA Series, Руководство по обслуживанию, Страница: 232 / 337

Troubleshooting by Error Code SiUS341615E
219 Service Diagnosis
3.31 Inverter Compressor Motor Lock
Error Code
E5
Applicable
Models
All outdoor unit models
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 inverter compressor motor does not operate even by starting it in forced startup mode.
Supposed
Causes
„
Inverter compressor lock
„
High differential pressure (0.5 MPa (72.5 psi) or more)
„
UVW connection error
„
Defective inverter PCB
„
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 relevant
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?
12/14 ton classes are equipped with
2 compressors.
Check for the compressor 1 or 2
applicable to the error code
E5
while in monitor mode of the
outdoor unit PCB.
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 for the connection wiring.
For Compressor 1
Connection wiring on the M1C side
For Compressor 2
Connection wiring on the M2C side
Check in Monitor Mode