Larsen & Toubro C*2000 Series, Руководство пользователя

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Chapter 12 Troubleshoot and maintenance
12-4 Cx2000 AC Drive
Brake control
abnormity
When the brake control is used, the output current is lower than
the rated current value of the motor set (I82) and lasts for over
10s, then the inverter output is turned off and the brake is not
opened.
Safe stop Terminal
A disconnection If safe stop is required, cut off panel SA and SC and turn off the
inverter output.
Safe stop Terminal
B disconnection If safe stop is required, cut off panel SA and SC and turn off the
inverter output.
12.2 Fault remedy
Protective function Abnormal cause Countermeasures
Over current
Caution
When an over current fault occurs, operation must be started after the
cause is removed to avoid damage to IGBT inside the inverter.
 Accel/Decel time is too short
compared to the GD
2
of the load.
 The inverter load is greater the
rated value.

Inverter output is uploaded
when the motor is free running.
 Occurrence of output short circuit
and ground fault
 echanical brake of the motor is
operating too fast.
 Increase the Accel/Decel time.
 Replace the inverter with
greater capacity.
 Resume operation after stopping
the motor or use H22.
 Check the output wiring.
 Check the mechanical brake.
Short circuit
 Occurrence of short circuit
between upper and lower IGBT arms
 Output short circuit of the inverter
occurs
 Accel/Decel time is too short
comparing the load inertia GD2.
 Check IGBT.
 Check the output wiring of the
inverter.

Increase the Accel/Decel time.
Ground fault
 The ground fault of the output
wiring for the inverter occurs
 The motor insulation is damaged
due to overheating.
 Check the output wiring of the
inverter.
 Please replace the motor.