WEG CFW-11 User Manual - page 82
Troubleshooting and Maintenance
6
CFW-11 | 6-3
Fault/Alarm
Description
Possible Causes
F065
Encoder Signal Fault
(SW)
Feedback obtained via encoder does not match the
commanded speed.
The fault can be disabled via parameter P0358.
Wiring between encoder and encoder interface accessory
interrupted.
Encoder is defective.
Encoder coupling to the motor is broken.
Inverter operating in current limit (In case the application
needs to run in such condition, this fault should be disabled
via parameter P0358).
F066
Encoder Signal Fault
(SW)
Feedback obtained via encoder does not match the
commanded speed.
The fault can be disabled via parameter P0358.
Wiring between encoder and encoder interface accessory
interrupted.
Encoder is defective.
Encoder coupling to the motor is broken.
Inverter operating in current limit (in case the application
needs to run in such condition, this fault should be disabled
via parameter P0358).
F067
Incorrect Encoder/
Motor Wiring
Fault related to the phase relation of the encoder
signals, if P0202 = 4 and P0408 = 0, 2, 3 or 4.
Note:
- It is not possible to reset this fault (when P0408>1).
- In this case, turn off the power supply, solve the
problem, and then turn it on again.
- When P0408 = 0, it is possible to reset this fault.
This fault could be disabled by means of parameter
P0358.
In this case it is possible to reset this fault.
Output motor cables U, V, W are inverted.
Encoder channels A and B are inverted.
Encoder was not properly mounted.
Motor with locked rotor or dragging at the start.
F071
Output Overcurrent
Output overcurrent fault.
Excessive load inertia or acceleration time too short.
Settings of P0135 or P0169 and P0170 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.
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.
Excessive duty cycle (too many starts/stops per minute).
Surrounding air temperature too high.
Loose connection or short-circuit (resistance
wiring connected to the motor termistor.
Motor termistor is not installed.
Blocked motor shaft.
F079
Encoder Signal Fault
Lack of encoder signals.
The fault can be disabled via switches of the ENC1,
ENC2 board.
Broken wiring between motor encoder and option kit for
encoder interface.
Defective encoder.
Encoder accessory defective or not well installed on the pro-
duct, and control configured for vector with encoder.
F080
CPU Watchdog
Microcontroller watchdog fault.
Electrical noise.
F082
Copy Function Fault
Fault while copying parameters.
Communication problem with the HMI.
F084
Auto-diagnosis Fault
Auto-diagnosis fault.
Please contact WEG.
A088
Communication Lost
Indicates a problem between the keypad and control
board communication.
Loose keypad cable connection.
Electrical noise in the installation.
A090
External Alarm
External alarm via digital input.
Note:
It is required to set a digital input to "No external
alarm".
Wiring was not connected to the digital input (DI1 to DI8) set
to "No external alarm".
F091
External Fault
External fault via digital input.
Note:
It is required to set a digital input to "No external
fault".
Wiring was not connected to the digital input (DI1 to DI8) set
to "No external fault".