NVF5 Series User Manual Chapter 7 Troubleshooting
6
、
Unsuitable V / F curve
Adjust V/F cruve or adjust
manual torque boost
E.OC2
Inverter
Decel.
running
overcurrent
1
、
Low grid voltage
Check the input power
supply
2
、
Decel. Time too short
Increase decel. time
3
、
Potential Energy Load or Big
Inertial Load
Add Regen. Brake
Components
4
、
Too small inverter power
Enlarge inverter power rate
E.OC3
Inverter
constant
speed running
overcurrent
1
、
Accel. Time too short
Increase accel. time
2
、
Load change frequently or
abnormal load
Check load
3
、
Low grid voltage
Check the input power
supply
4
、
Too small inverter power
Enlarge inverter power rate
E.OV1
Inverter
Accel.
running
overvoltage
1
、
Motor short circuit to ground Check motor cable
2
、
Abnormal input voltage
Check the input power
supply
3
、
Motor quick start again at
high speed
Start inverter when motor
stop
4
、
Accel. Time too short
Increase accel. time
E.OV2
Inverter
Decel.
running
overvoltage
1
、
Motor short circuit to ground Check motor cable
2
、
Potential Energy Load or Big
Inertial Load
Add Regen. Brake
Components
Increase decel. time
Increase decel. time
E.OV3
Inverter
constant
speed running
overvoltage
1
、
Motor short circuit to ground Check motor cable
2
、
Incorrect setting of
Parameter ASR
in vector control
Refer to Parameter Group
F3 about how to set ASR
3
、
Accel. Time too short
Increase accel. time
4
、
Abnormal Input Power Supply Check Input Power Supply
5
、
Abnormal fluctuation of input
voltage
Install Input AC Reactor
6
、
Big Inertial Load
Add Regen. Brake
Components
E.SPI
Input Lose
Phase
R.S.T lose phase
Checking R S T Wiring
Check Input Voltage
E.SPO
Output Lose
Phase
U.V.W lose phase
Checking U V W Wiring
Check Motor Cable
E.FO
Power Module 1
、
The output three-phase with Re-wire, confirm the
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