Troubleshooting and Maintenance
6-3
6
Fault/Alarm
Description
Possible Causes
A046:
High Load on Motor
Load is too high for the used motor.
Note:
It may be disabled by setting P0348=0 or 2.
Settings of P0156, P0157, and P0158 are too low for the
used motor.
Motor shaft load is excessive.
A047:
IGBT Overload Alarm
An IGBT overload alarm occurred.
Note:
It may be disabled by setting P0350=0 or 2.
Inverter output current is too high.
F048:
IGBT Overload Fault
An IGBT overload fault occurred.
Note:
It may be disabled by setting P0350=0 or 2.
Inverter output current is too high.
A050:
IGBT High
Temperature
A high temperature alarm was detected by the NTC
temperature sensors located on the IGBTs.
Note:
It may be disabled by setting P0353=2 or 3.
Surrounding air temperature is too high (>50 °C (122 °F))
and output current is too high.
Blocked or defective fan.
Inverter heatsink is completely covered with dust.
F051:
IGBT
Overtemperature
A high temperature fault was detected by the NTC
temperature sensors located on the IGBTs.
F067:
Incorrect Encoder/
Motor Wiring
Fault related to the phase relation of the encoder
signals.
Note:
- This fault can only happen during the self-tuning
routine.
- It is not possible to reset this fault.
- In this case, turn off the power supply, solve the
problem, and then turn it on again.
Output motor cables U, V, W are inverted.
Encoder channels A and B are inverted.
Encoder was not properly mounted.
F070:
Overcurrent /
Short-circuit
Overcurrent or short-circuit detected at the output,
in the DC bus, or at the braking resistor.
Note:
It is available only for models of frames A, B,
and C.
Short-circuit between two motor phases.
Short-circuit between the connection cables of the dynamic
braking resistor.
IGBT modules are shorted.
F071:
Output Overcurrent
The inverter output current was too high for too
long.
Excessive load inertia or acceleration time too short.
Settings of P0135, P0169, P0170, P0171, and P0172 are
too high.
F072:
Motor Overload
The motor overload protection operated.
Note:
It may be disabled by setting P0348=0 or 3.
Settings of P0156, P0157, and P0158 are too low for the
used motor.
Motor shaft load is excessive.
F074:
Ground Fault
A ground fault occured either in the cable between
the inverter and the motor or in the motor itself.
Note:
It may be disabled by setting P0343=0.
Shorted wiring in one or more of the output phases.
Motor cable capacitance is too large, resulting in current
peaks at the output.
(1)
F076:
Motor Current
Imbalance
Fault of motor current imbalance.
Note:
It may be disabled by setting P0342=0.
Loose connection or broken wiring between the motor and
inverter connection.
Vector control with wrong orientation.
Vector control with encoder, encoder wiring or encoder
motor connection inverted.
F077:
DB Resistor Overload
The dynamic braking resistor overload protection
operated.
Excessive load inertia or desacceleration time too short.
Motor shaft load is excessive.
Wrong setttings for parameters P0154 and P0155.
F078:
Motor
Overtemperature
Fault related to the PTC temperature sensor installed
in the motor.
Note:
- It may be disabled by setting P0351=0 or 3.
- It is required to set the analog input / output to the
PTC function.
Excessive load at the motor shaft.
Excessive duty cycle (too many starts / stops per minute).
Surrounding air temperature too high.
Loose connection or short-circuit (resistance < 100
:
) in the
wiring connected to the motor termistor.
Motor termistor is not installed.
Blocked motor shaft.
F079:
Encoder Signal Fault
Lack of encoder signals.
Broken wiring between motor encoder and option kit for
encoder interface.
Defective encoder.
7DEOHFRQW´)DXOWVµ´$ODUPVµDQG3RVVLEOH&DXVHV
