WEG CFW-11 User Manual - page 92
Troubleshooting and Maintenance
6
6-2 | CFW-11
When an alarm situation (AXXX) is detected:
The keypad displays the alarm code and description.
The "STATUS" LED changes to yellow.
The PWM pulses are not blocked (the inverter remains operating).
6.2 FAULTS, ALARMS, AND POSSIBLE CAUSES
Table 6.1 - Faults, alarms and possible causes
Fault/Alarm
Description
Possible Causes
F006
Imbalance or Input Phase
Loss
Mains voltage imbalance too high or phase missing
at the input power supply.
Note:
- If the motor is unloaded or operating with reduced
load, this fault may not occur.
- Fault delay is set at parameter P0357.
P0357 = 0 disables the fault.
Phase missing at the inverter input power supply.
Input voltage imbalance > 5 %.
Pre-charge circuit fault.
F021
DC Bus Undervoltage
DC bus undervoltage condition occurred.
The input voltage is too low and the DC bus voltage
dropped below the minimum permitted value (monitor
the value at Parameter P0004):
Ud
Ud
Ud
Ud
Phase loss at the input power supply.
Pre-charge circuit failure.
Parameter P0296 was set to a value above the power
supply rated voltage.
F022
DC Bus Overvoltage
DC bus overvoltage condition occurred.
The input voltage is too high and the DC bus voltage
surpassed the maximum permitted value:
Ud > 800 V - for 380-480 V models (P0296 = 1, 2, 3 or 4).
Inertia of the driven-load is too high or deceleration time
is too short.
Parameters P0151 or P0153 or P0185 set to high.
F030
Power Module U Fault
Power Module U IGBTs desaturation.
Short-circuit between motor phases U and V or U and W.
F034
Power Module V Fault
Power Module V IGBTs desaturation.
Short-circuit between motor phases V and U or V and W.
F038
Power Module W Fault
Power Module W IGBT desaturation.
Short-circuit between motor phases W and U or W and V.
F042
DB IGBT Fault
Desaturation of Dynamic Braking IGBT occured.
Short-circuit between the connection cables of the
dynamic braking resistor.
A046
High Load on Motor
Load is too high for the used motor.
Note:
It may be disabled by setting P0348 = 0 or 2.
Settings of P0156, P0157, and P0158 are too low for the
used motor.
Motor shaft load is excessive.
A047
IGBT Overload Alarm
An IGBT overload alarm occurred.
Note:
It may be disabled by setting P0350 = 0 or 2.
Inverter output current is too high.
F048
IGBT Overload Fault
An IGBT overload fault occurred.
Inverter output current is too high.