WEG CFW-11 User Manual page 67

Fault/Alarm
F071: The inverter output current was too high for too
Output Overcurrent long.
F072: The motor overload protection operated.
Motor Overload Note:
It may be disabled by setting P0348=0 or 3.
F074: A ground fault occured either in the cable between
Ground Fault the inverter and the motor or in the motor itself.
Note:
It may be disabled by setting P0343=0.
F076: Fault of motor current imbalance.
Motor Current Note:
Imbalance It may be disabled by setting P0342=0.
F077: The dynamic braking resistor overload protection
DB Resistor Overload operated.
F078: Fault related to the PTC temperature sensor installed
Motor in the motor.
Overtemperature Note:
- It may be disabled by setting P0351=0 or 3.
- It is required to set the analog input / output to the
PTC function.
F079: Lack of encoder signals.
Encoder Signal Fault
F080: Microcontroller watchdog fault.
CPU Watchdog
F082: Fault while copying parameters.
Copy Function Fault
F084: Auto-diagnosis fault.
Auto-diagnosis Fault
A088: Indicates a problem between the keypad and con-
Keypad Comm. Fault trol board communication.
A090: External alarm via digital input.
External Alarm Note:
It is required to set a digital input to "No external
alarm".
F091: External fault via digital input.
External Fault Note:
It is required to set a digital input to "No external
fault".
F099: Current measurement circuit is measuring a wrong
Invalid Current Offset value for null current.
A110: Alarm related to the PTC temperature sensor instal-
High Motor led in the motor.
Temperature Note:
- It may be disabled by setting P0351=0 or 2.
- It is required to set the analog input / output to the
PTC function.
A128: Indicates that the inverter stopped receiving valid
Timeout for Serial messages within a certain time interval.
Communication Note:
It may be disabled by setting P0314=0.0 s.
A129: Alarm that indicates interruption of the Anybus-CC
Anybus is Offline communication.
Table 6.1 (cont.) - Faults, alarms and possible causes
Description
Troubleshooting and Maintenance
Possible Causes
Excessive load inertia or acceleration time too short.
Settings of P0135, P0169, P0170, P0171, and P0172 are
too high.
Settings of P0156, P0157, and P0158 are too low for the
used motor.
Motor shaft load is excessive.
Shorted wiring in one or more of the output phases.
Motor cable capacitance is too large, resulting in current
peaks at the output.
(1)
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.
Excessive load inertia or desacceleration time too short.
Motor shaft load is excessive.
Wrong setttings for parameters P0154 and P0155.
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 Ω) in the
wiring connected to the motor termistor.
Motor termistor is not installed.
Blocked motor shaft.
Broken wiring between motor encoder and option kit for
encoder interface.
Defective encoder.
Electrical noise.
An attempt to copy the keypad parameters to an inverter with
a different firmware version.
Please contact WEG.
Loose keypad cable connection.
Electrical noise in the installation.
Wiring was not connected to the digital input (DI1 to DI8) set
to "No external alarm".
Wiring was not connected to the digital input (DI1 to DI8) set
to "No external fault".
Defect in the inverter internal circuitry.
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 Ω) in the
wiring connected to the motor termistor.
Motor termistor is not installed.
Blocked motor shaft.
Check the wiring and grounding installation.
Make sure the inverter has sent a new message within the
time interval set at P0314.
PLC entered into the idle state.
Programming error. Master and slave set with a different
number of I/O words.
Communication with master has been lost (broken cable,
unplugged connector, etc.).
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