Protective Functions; Trips And Countermeasures - Toshiba VFS5 Series Operation Manual

Display Description
OC1 Overcurrent during
acceleration
OC2
Overcurrent during
deceleration
OC3 Overcurrent during
constant-speed run
OCA
Phase short circuit
OCL
Load-end short
circuit (output
terminal check) trip
during start-up
OP1
Overvoltage during
acceleration
OP2
Overvoltage during
deceleration
OP3
Overvoltage
mOFF
Undervoltage
OL I
Drive overload trip
OL 2
Motor overload trip
OLr
Braking resistor
overload trip
OH
Overheat trip
E
Emergency stop
EOFF
Checking
emergency stop
acceptance display
EEPI
EEPROM fault
TOSHIBA
Protective Functions (Trips Information)

Trips and Countermeasures

1) Increase the acceleration time (acc)
2) Increase or decrease the torque boost level (vb)
1) Increase the deceleration time (dEC).
1) Reduce the variance of the load conditions.
1) The main circuit is abnormal. Ask your agent to repair the inverter.
1) The insulation of the main output circuit or motor is abnormal.
2) Check the wiring and insulation.
3) If 1 and 2 are normal, the elements of the main circuit may be
defective. Ask your agent to repair the inverter.
1) Check the power voltage.
2) Check if the power is turned on and off frequently.
3) Check whether or not excessive current flows instantaneously through
a load.
1) Increase the deceleration time (dEC).
1) Check the power voltage.
2) Check if the power is turned on and off frequently.
3) Check whether or not excessive current flows instantaneously through
a load.
1) The input voltage is too low.
2) Check the power supply condition and input wiring.
1) The load is excessive. Reduce it.
2) The V/f characteristics or torque boost level are not proper. Check
whether or not a 50 Hz rated motor runs on the 60 Hz base frequency.
Increase or decrease the torque boost level.
3) Increase the drive rating.
1) Increase the deceleration time (dEC).
1) Check whether or not the ambient temperature is too high. If the
ambient temperature is too high, remove the seal from the top cover.
1) Operation stops on the panel during automatic or remote operation.
1) Operation stops on the panel during automatic or remote operation.
Stop operation in an emergency by pressing the STOP key twice. To
cancel an emergency stop, press any other key.
1) Turn off the power, then turn it on again.
2) If the EEPROM does not recover from the error, ask your agent to
repair the drive.
46
Countermeasures