Inverter Compressor Motor Lock - Daikin SkyAir RZR-TA Series Service Manual

SiUS281811EA

4.31 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
 Inverter compressor lock
Causes  High differential pressure (0.5 MPa (72.5 psi) and above)
 Incorrect UVW wiring
 Defective PCB
 Stop valve is not opened
Troubleshooting
Power OFF
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.
The compressor cable
has a defect.
NO
Are wire
connections made to
phases U, V, and W in the
proper order and
manner?
YES
Does wire follow the
wiring diagram?
YES
Disconnect the cable from the
compressor, and then check
the compressor for the
insulation resistance.
A Go to the next page.
Troubleshooting by Error Codes
NO
YES
NO
NO
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.
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