Version 1.0 09/08/2017
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81
7.
Chapter 7 Troubleshooting
7-1
.
Fault message and troubleshooting
No.
Fault code
Failure type
Possible causes
Solutions
1 E.oUP
Inverter unit U-phase
fault
1. Accelerated too quickly
2. Internal damage of the
phase IGBT
3. Malfunction caused by
interference
4. Whether Grounded well or
not
1. Increase acceleration time
2. Seek for support
3. Check whether the
peripheral devices have
strong interference
2 E.oUP
Inverter unit V-phase
fault
3 E.oUP
Inverter unit W-phase
fault
4 E.oC1
Overcurrent when
accelerating
1. Accelerated too quickly
2. Mains voltage is low
3. The inverter power is small
4: Output phase loss
1. Increase acceleration time
2. Check input power
3. Choose the inverter with
larger power
Inverter
4. Check the output wiring
5 E.oC2
Overcurrent when
decelerating
1. Decelerated too quickly
2. Load inertia torque is large
3. The inverter power is small
4: Output phase loss
1. Increase deceleration time
2. Add suitable braking
components
3. Choose the inverter with
larger power
4. Check the output wiring
6 E.oC3
Overcurrent at
constant speed
1. Load mutation or abnormal
2. Mains voltage is low
3. The inverter power is small
4: Output phase loss
1. Check load or reduce load
mutation
2. Check input power
3. Choose the inverter with
larger power
4. Check the output wiring
7 E.oU1
Overvoltage when
accelerating
1. Input voltage is abnormal
2. After momentary power
failure, restart the motor that
is rotating
3. Acceleration time is too
short
1. Check input power
2. Avoid re-starting at the
state of stop
3. Increase acceleration time
8 E.oU2
Overvoltage when
decelerating
1. Decelerated too quickly
2. Large load inertia
1. Increase deceleration time
2. Increasing braking
components of energy