Alarms, Faults And Possible Causes - WEG CFW-11W G2 RB Series User Manual

Troubleshooting and Maintenance

6.2 ALARMS, FAULTS AND POSSIBLE CAUSES

Fault/Alarm
F006
Grid Phase Fault/Unbal.
F020
24 Vdc Power Supply
Undervoltage
F021
DC Link Undervoltage
6
F022
DC Link Overvoltage
(1)
F030
Arm U Fault
F034 (1)
Arm V Fault
F038
(1)
Arm W Fault
A047
Overload on the IGBTs
F048
Overload on the IGBTs
F070
Overcurr. / Short circ.
F071
Overcurrent at the Input
F074
Ground Fault
F080
CPU Fault (Watchdog)
F082
Copy Function Fault
F084
Self-Diagnostics Fault
A088
Communication Lost
A090
External Alarm
6-2 | CFW-11MW G2 RB
Table 6.1: Alarms, faults and possible causes
Description
Phase loss fault on the grid or wrong phase sequence.
Undervoltage on the 24 Vdc power supply that feeds
the control.
Undervoltage on the DC link.
Overvoltage on the DC link.
Desaturation on the IGBTs of arm U.
Desaturation on the IGBTs of arm V.
Desaturation on the IGBTs of arm W.
IGBT overload alarm.
IGBT overload fault.
Overcurrent or short circuit at the input, DC link.
Input overcurrent fault.
Overcurrent to ground fault.
Note:
- It may be disabled by setting P0343 = 0.
Watchdog fault on the microcontroller.
Fault in the copy of parameters.
Self-Diagnostics Fault.
Fault in the communication of the HMI with the
control board.
External alarm via DI.
Note:
- It is necessary to program DI for "without external
fault".
Possible Causes
Check connections of CSR11 board.
„
Check connections of the synchronization
„
transformers.
Check connection with the grid.
„
Voltage on the power supply below 22.8 Vdc.
„
Supply voltage too low, producing voltage on the
„
DC link below the minimum value (read the 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 at the input.
„
Fault on the pre-charge circuit.
„
Parameter P0296 selected for use above the rated
„
line 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 too high.
„
Short-circuit between phases U and V or U and
„
W of the input.
Short-circuit between phases V and U or V and
„
W of the input.
Short-circuit between phases W and U or W and
„
V of the input.
High current at the converter input.
„
High current at the converter input.
„
IGBT modules short circuited.
„
Input reactance too low.
„
Setting of P0169 or P0170 too high.
„
Synchronization circuit connection with one or
„
more inverted phases.
Short-circuit to ground in + UD or -UD.
„
Electric noise.
„
Attempt to copy parameters from the HMI to the
„
inverter with incompatible software versions.
Defect on the inverter internal circuits.
„
Poor contact on the HMI cable.
„
Electric noise on the installation.
„
Wiring at the DI1 to DI8 inputs open (programmed
„
for "without external alarm").