Toshiba VF-SX - Manual (Page 153)

16-2
TOSHIBA
16.1 Inverter Trip Causes and Remedies
The trip codes and potential remedies are shown in the table below.
TABLE 16-1: INVERTER TRIP CAUSES AND REMEDIES
Display Explanation and Possible Remedy
O C I OVERCURRENT TRIP DURING ACCELERATION
I
1. Lengthen the acceleration time
[fl C C ]
setting.
2- Decrease the torque boost rate
o c e OVERCURRENT TRIP DURING DECELERATION
1. Lengthen the deceleration time
(
c/ E C1 setting.
0 C 3 OVERCURRFNT TRIP DURING DPERATION
1. Sudden change in power required to drive load. 1
2. Reduce load variations.
O C R PHASE OVERCURRENT TRIP DURING STARTING ICHFCK GTRi
1. Check the main circuit devices. An output device (GTR) is
probably defective and must be replaced.
O C L LOAD SIDE OVERCURRENT AT STARTUP iCHECK OUTPUT TERMINALl
1. The motor circuit wiring or motor insulation is defective.
2. Check the wiring and insulation.
O P R OVERVOLTAGE TRIP ON DC BUS DURING DECELERATION
1. Lengthen the deceleration time
[ d E C ]
setting.
2. Install optional regenerative discharge resistor.
1
OVERVOITAGF TRIP ON DC BUS
1. Check the power source for voltage surges or high voltage.
P O F F UNDERVOLTAGE (See Note 11
1. The input voltage has decreased.
2. Check the power status and input side wiring for proper
input voltage.
O L MOTOR OVERLOAD TRIP
1. The load may exceed the capability of the drive.
2. The V/f characteristics or torque boost may be
inappropriate. Try increasing the torque boost setting.
3. Increase the Inverter size.
4. Make sure a 50 HZ motor is not being operated with
inverter in 60 HZ mode.
O i r OVERLOAD TRIP IN REGENERATIVE DISCHARGE BRAKING RESISTOR
1. If possible, do not stop the drive as often.
2. Increase the deceleration time
[ d E C ]
setting.
3. Increase the regenerative discharge resistance capacity.
TABLE 16-1 (Continued on next page)