Mccb Trips; Motor Has Over Temperature; Communication Is Not Available - Panasonic AAD03011 Instruction Manual

1. MCCB trips

Is the capacity selection of MCCB correct ?
Yes
Is input/output terminal wiring correct?
Yes
Does a ground fault exist in main circuit wiring?
No
MCCB failure or inverter malfunction.
(Contact us.)

2. Motor has over temperature

Is the motor overloaded?
No
Are voltage/frequency characteristics correct?
Yes
Is the load factor reduction correct for
continuous operation at low frequency?
Yes
Does an open phase exist in the
output of the inverter?
No
Inverter malfunction
(Contact us.)

3. Communication is not available

Is wiring correct?
Yes
Is communication setting correct?
Yes
Does noise exist?
No
Inverter malfunction
(Contact us.)
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Troubleshooting
Note) Use a current leakage circuit breaker
Yes
No
No
Yes
that supports the inverter.
Reduce the motor load factor.
Increase the motor capacity.
(If the motor capacity exceeds the inverter
capacity, increase the latter as well.)
Reduce voltage/frequency characteristics.
Reduce the motor load factor, or
carry out forced cooling.
Increase the motor capacity.
(If the motor capacity exceeds the inverter
capacity, increase the latter as well.)
Check if output frequency can be
increased for use.
Reduce the noise around the inverter.
Separate the communication cable
and the other wirings.