Inverter Compressor Motor Lock - Daikin VRV IV-S RXTQ-TAVJU Series Service Manual

Troubleshooting by Error Code

4.22 Inverter Compressor Motor Lock

E5
Error Code
Applicable
All outdoor units
Models
Method of Error PCB takes the position signal from UVW line connected between the inverter and compressor, and
Detection the error is detected when any abnormality is observed in the phase-current waveform.
Error Decision This error will be output when the inverter compressor motor does not start up even in forced
Conditions startup mode.
Supposed
Causes
Troubleshooting
171
Inverter compressor lock
High differential pressure (0.5 MPa (72.5 psi) and above)
Incorrect UVW wiring
Defective 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?
Power OFF
Check the compressor cable
for disconnection and flaws.
The compressor cable
has a defect.
Are wire
connections made
to phases U, V, and W in the
proper order and
manner?
Does wire follow
the wiring diagram?
Disconnect the cable from the
compressor, and then check
the compressor for the
insulation resistance.
NO
YES
YES
NO
NO
YES
NO
YES
A
SiUS331604E
Onsite causes.
Open the stop valve.
Replace the cable, and
then securely connect the
connectors.
Make wire connections
without a mistake.
W
U
V
Connect correctly.
Service Diagnosis