TECO JNEV-401~403-H3 - Page 73

Chapter 5 Trouble shooting and maintenance
5-2
2. Errors which can be recovered both manually and automatically
Display Error Cause Corrective Action
Over current 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
Over-current at
deceleration
The preset deceleration time is
too short
Set a longer deceleration time
Over-current at
acceleration
1. Acceleration time is too short
2. The capacity of the motor is
hi
g
her than the capacit
y
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
2. Replace the inverter with the
same or greater capacit
y
as
that of the motor
3. Check the motor
4. Check the wiring
5. Replace the IGBT module
Over-current
during run
1. Transient load change
2. Transient power change
Increase inverter capacity
Over voltage
during
operation/
deceleration
1. Deceleration time settin
g
is too
short or excessive load inertia
2. Power voltage varies widely
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 inverter capacity
High heat sink
temperature
during
operation
1. Heavy load
2. Ambient temperature too hi
g
h
or bad ventilation
1. Check if there are any
problems with the load
2. Increase inverter capacity
3. Improve ventilation
conditions
4. Inspect the setting value of
parameter C13
OCS
OCD
OCA
OCC
OVC
OHC