Faults, Alarms And Possible Causes - WEG CFW11M G2 Series User Manual

Troubleshooting and Maintenance

6.2 FAULTS, ALARMS AND POSSIBLE CAUSES

Fault/Alarm
F020:
24Vdc Power Supply
Undervoltage
F021:
DC Link Undervoltage
6
F022:
DC Link Overvoltage
F030:
(1)
Power Module U Fault
F034:
(1)
Power Module V Fault
F038:
(1)
Power Module W Fault
A046:
High Load on the Motor
A047:
IGBTs Overload Alarm
F048:
IGBTs Overload Fault
F067:
Encoder /Motor Wiring Is
Inverted
F070:
Overcurrent/
Short circuit
F071:
Output Overcurrent
F072:
Motor Overload
6-2 | CFW-11M G2
Table 6.1: Faults, alarms and possible causes
Description
Undervoltage on the 24Vdc power supply that
feeds the control.
DC Link undervoltage condition occurred.
DC Link overvoltage condition occurred.
Desaturation of IGBT occured in Power Module U.
Desaturation of IGBT occured in Power Module V.
Desaturation of IGBT occured in Power Module W.
Load is too high for the used motor
Note:
It may be disabled by setting P0348 = 0 or 2.
An IGBTs overload alarm occurred.
Note:
It may be disabled by setting P0350 = 0 or 2.
An IGBTs overload fault occurred.
Fault related to the phase relation of the encoder
signals, if P0202 = 4 and P0408 = 2, 3 or 4.
Note:
- This error can only occur during self-tuning.
- This fault cannot be reset.
- In this case, de-energize the inverter, solve the
problem and then energize it.
Overcurrent or short circuit in the output, DC link
or braking resistor.
The inverter output current was too high for too
long.
Motor overload fault.
Note:
- It can be disabled by setting P0348 = 0 or 3.
Possible Causes
Voltage on the power supply below 22.8 Vdc.
„
Supply voltage too low, producing voltage on the
„
DC link below the minimum value (read value in
parameter P0004):
− Ud < 385 V - Supply voltage 380 V (P0296 = 1).
− Ud < 405 V – Supply voltage 400-415 V
(P0296 = 2).
− Ud < 446 V – Supply voltage 440-460 V
(P0296 = 3).
− Ud < 487 V - Supply voltage 480 V (P0296 = 4).
− Ud < 530 V – Supply voltage 500-525 V
(P0296 = 5).
− Ud < 696 V – Supply voltage 550-575 V
(P0296 = 6).
− Ud < 605 V - Supply voltage 600 V (P0296 = 7).
− Ud < 696 V – Supply voltage 660-690 V
(P0296 = 8).
Phase loss in the input.
„
Fault in the pre-charge circuit.
„
Parameter P0296 was set to a value above of the
„
power supply rated voltage.
Supply voltage too high, producing voltage on the
„
DC link above the maximum value:
− Ud > 800 V - Models 380 - 480 V (P0296 = 1,
2, 3 and 4).
− Ud > 1000 V - Models 500-600 V (P0296 = 5,
6 and 7).
− Ud > 1200 V - Models 660-690 V (P0296 = 8).
Driven load inertia too high or deceleration ramp
„
too fast.
Setting of P0151 or P0153 or P0185 too high.
„
Short circuit between phases U and V or U and
„
W of the motor.
Short circuit between phases V and U or V and
„
W of the motor.
Short circuit between phases W and U or W and
„
V of the motor.
Setting of P0156, P0157 and P0158 too low for
„
the motor.
Overload on the motor shaft.
„
Inverter output current is too high.
„
Inverter output current is too high.
„
U, V, W wiring to the motor is inverted.
„
Encoder channels A and B are inverted.
„
Error in the encoder assembly position.
„
Short circuit between two motor phases.
„
Short circuit of the connecting cables of the
„
dynamic braking.
IGBT modules short circuited.
„
Load inertia too high or acceleration ramp too fast.
„
Setting of P0135, P0169, P0170, P0171 and P0172
„
too high.
Setting of P156, P157 and P158 too low for the
„
motor.
Load on the motor shaft is too high.
„