Download Westinghouse W-007 Specifications

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