WEG CFW-11 User Manual - page 93
Troubleshooting and Maintenance
6
CFW-11 | 6-3
Fault/Alarm
Description
Possible Causes
A050
U Phase IGBT High
Temperature
The IGBT NTC temperature sensors detected a high
temperature alarm.
Note:
It may be disabled by setting P0353 = 2 or 3.
High inverter surrounding air temperature (> 50 °C (122 °F)).
and high output current.
Blocked or defective fan.
Very dirty heatsink.
F051
U Phase IGBT
Overtemperature
The IGBT NTC temperature sensors detected an
overtemperature fault.
A053
V Phase IGBT High
Temperature
The IGBT NTC temperature sensors detected a high
temperature alarm.
Note:
It may be disabled by setting P0353 = 2 or 3.
F054
V Phase IGBT
Overtemperature
The IGBT NTC temperature sensors detected an
overtemperature fault.
A056
W Phase IGBT High
Temperature
The IGBT NTC temperature sensors detected a high
temperature alarm.
Note:
It may be disabled by setting P0353 = 2 or 3.
F057
W Phase IGBT
Overtemperature
The IGBT NTC temperature sensors detected an
overtemperature fault.
F062
(7)
Thermal Imbalance
Fault of power module temperature imbalance.
The temperature difference between IGBTs modules of
the same phase (U, V, W) was above 15 °C (59 °F).
The temperature difference between IGBTs modules of
the same phase (U, V, W) was above 20 °C (68 °F).
The temperature difference between rectifier modules of
different phases (R and S, R and T, S and T) was above
15 °C (59 °F).
F067
Encoder / Motor Wiring is
Inverted
Fault related to the phase relation of the encoder
signals if P0202 = 4 and P0408 = 2, 3 or 4.
Note:
- It is not possible to reset this fault during the
selftuning.
- 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.
F071
Output Overcurrent
Output overcurrent fault.
Excessive load inertia or acceleration time too short.
Settings of P0135 or P0169, P0170, P0171, and P0172
are too high.
F072
Motor Overload
Fault of motor current imbalance.
Note:
It may be disabled by setting P0348 = 0 or 3.
Settings of P0156, P0157, and P0158 are too low for the
used motor.
Excessive load at the motor shaft.
F074
Ground Fault
Ground overcurrent fault.
Note:
It may be disabled by setting P0343 = 0.
Short-circuit to the ground at one or more of the output
phases.
Motor cable capacitance is too large, resulting in current
peaks at the output.
(5)
F076
Motor Current
Imbalance
Fault of motor current imbalance.
Note:
It may be disabled by setting P0342 = 0.
Loose connection or interrupted wiring between motor
and inverter.
Vector control lost orientation.
Vector control with inverted encoder wiring or inverted
motor connection.
F077
DB Resistor Overload
The dynamic braking resistor overload
protection tripped.
Excessive load inertia or deceleration time too short.
Excessive load at the motor shaft.
Parameter P0154 and P0155 incorrect setting.
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 necessary to set an analog input / output to
the PTC function.
Excessive load at the motor shaft.
Too heavy duty cycle (too many starts/stops per minute).
Too high motor surrounding air temperature.
Loose connection or short-circuit (resistance
the wiring connected to the motor thermistor.
Motor thermistor is not installed.
Blocked motor shaft.
F079
Encoder Signal Fault
Lack of encoder signals.
Broken wires between the motor encoder and the option
and the encoder interface board.
Defective encoder.
F080
CPU Watchdog
Microcontroller watchdog fault.
Electrical noise.
F082
Copy Function Fault
Fault while copying parameters.
Communication problem with the HMI.