78 Troubleshooting and maintenance Emotron AB 01-3990-11r3
Errors which can be recovered manually and automatically
Display Error Cause Remedy
Over-current
at start
The motor wind and enclosure
short circuit
The motor contacts and earth
short circuit
The IGBT module is damaged
Inspect the motor
Inspect the wire
Replace the transistor module
Over-current
at decelera-
tion
The preset deceleration time is
too short.
Set a longer deceleration time
Over-current
at accelera-
tion
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 coil and the shell
4. Short circuit between
motor wiring and earth
5. IGBT module is damaged
1. Set a longer acceleration time
2. Replace with an VSD of the
same capacity as the motor
3. Check the motor
4. Check the wiring
5. Replace the IGBT module
Over-current
at fixed speed
1. Transient load change
2. Transient power change
1.Increase the capacity of the
VSD
2. Rerun parameter autotuning
(0-06 = 1)
3. Reduce stator resistance (14-
0) if the above remedies are
helpless
Voltage too
high during
operation/
deceleration
1. Deceleration time setting too
short or large load inertia
2. Power voltage varies widely
1. Set a longer deceleration
time
2. Add a brake resistor or brake
module
3. Add a reactor at the power
input side
4. Increase VSD capacity
Illegal CPU
interruption
Outside noise interference
Send back to be repaired if it
happens repeatedly
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General