EV Inverter Operating Manual
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TECO
– Westinghouse Motor Company 56
Table 13.2
Automatically and Manually Recoverable Errors
Display
Error
Cause
Remedy
Overcurrent at start
1. Motor winding and
frame short circuit
2. Motor and ground short
circuit
3. Power module is
damaged
1. Check the motor
2. Check the wiring
3. Replace the power module
Overcurrent at
deceleration
The preset deceleration time is set
too short
Set a longer deceleration time
(Parameter F02)
Overcurrent at
acceleration
1. Acceleration time is set
too short
2. The capacity of the
motor exceeds the
capacity of the inverter
3. Short circuit between
the motor winding and
frame.
4. Short circuit between
motor wiring and earth
5. IGBT module is
damaged
1. Set a longer acceleration time
(Parameter F01)
2. Replace the inverter with the
same or greater capacity as
that of the motor
3. Check the motor
4. Check the wiring
5. Replace the IGBT module
Overcurrent during
run
1. Transient load change
2. Transient power change
Increase inverter capacity
Overvoltage during
operation/
deceleration
1. Deceleration time is set too low
or excessive load inertia
2. Input voltage varies widely
1. Set a longer deceleration time
(Parameter F02)
2. Add a braking resistor or braking
unit
3. Add a reactor to the input line
side
4. Increase inverter capacity
Excessive heat sink
temperature during
operation
1. Excessive motor load
2. Ambient temperature too high or
poor ventilation
1. Check if there are any problems
with the motor load
2. Increase inverter capacity
3. Improve ventilation conditions
4. Check the setting value of
parameter C13
OCS
OCD
OCA
OCC
OVC
OHC
Summary of Contents for EV INVERTER Series
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