WEG CFW-11 User Manual - page 81
Troubleshooting and Maintenance
6
6-2 | CFW-11
When an alarm situation (alarm (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 is still 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
in 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.
- In the case of using single-phase it is necessary to
disable this failure.
Phase missing at the inverter's input power supply.
Input voltage imbalance > 5 %.
Phase loss at L3/R or L3/S may cause F021 or F185.
Phase loss at L3/T will cause F006.
F021
DC Link Undervoltage
DC Link undervoltage condition occurred.
The input voltage is too low and the DC Link voltage dropped
below the minimum permitted value (monitor the value at
Parameter P0004):
Ud
Ud
Ud
Ud
Ud
Phase loss in the input power supply.
Pre-charge circuit failure.
Parameter P0296 was set to a value above of the power
supply rated voltage.
F022
DC Link Overvoltage
DC Link overvoltage condition occurred.
The input voltage is too high and the DC Link voltage surpas-
sed the maximum permitted value:
Ud > 400 V - For 220 / 230 V input models (P0296 = 0)
Ud > 800 V - For 380 / 480 V input 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 IGBTs 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.
High current at the inverter output - consider the values of the
accor-
ding to the used switching frequency.
F048
IGBT Overload Fault
An IGBT overload fault occurred.
High current at the inverter output – consider the values of
according to the used switching frequency.
A050
IGBT High
Temperature
A high temperature alarm was detected by the NTC
temperature sensors located on the IGBTs.
Note:
It may be disabled by setting P0353 = 2 or 3.
Surrounding air temperature is too high (> 45 °C (113 °F))
and output current is too high.
Heatsink fan blocked or defective.
Very dirty heatsink.
F051
IGBT
Overtemperature
A high temperature fault was detected by the NTC
temperature sensors located on the IGBTs.