Emotron VSA 23 Manual Del Usuario página 61

2. Errors which can be recovered both manually and
automatically
Table 25
Display
Over-current at
OCS
start
Over-current at
OCD
deceleration
Over-current at
OCA
acceleration
Over-current dur-
OCC
ing run
Over voltage dur-
OVC
ing operation/
deceleration
High heat sink
OHC
temperature dur-
ing operation
60 Troubleshooting and maintenance
Error
1.Motor winding and frame short
circuit
2.Motor and earth short circuit
3.Power module is damaged
The preset deceleration time is
too short
1. Acceleration time too short
2. The capacity of the motor is
higher than the capacity of the
VSD
3.Short circuit between the
motor winding and frame.
4.Short circuit between motor
wiring and earth.
5. IGBT module is damaged.
1. Transient load change
2. Transient power change
1. Deceleration time setting is
too short or excessive load iner-
tia
2. Power voltage varies widely
1. Heavy load
2. Ambient temperature too high
or bad ventilation
Cause
Emotron AB 01-3991-11r2
Corrective Action
1.Check the motor
2.Check the wiring
3.Replace the power module
Set a longer deceleration time
1. Set a longer acceleration
time
2. Replace the VSD with the
same or greater capacity as
that of the motor.
3. Check the motor
4. Check the wiring
5. Replace the IGBT module
Increase VSD capacity
1. Set a longer deceleration
time
2. Add a braking resistor or
braking unit
3. Add a reactor at the input
line side
4. Increase VSD capacity
1. Check if there are any prob-
lems with the load
2. Increase VSD capacity
3. Improve ventilation condi-
tions
4. Inspect the setting value of
parameter [217]