WEG CFW900, User Manual

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TROUBLESHOOTING AND MAINTENANCE
Protection/Alarm Description Possible causes
F021:
DC Link Undervoltage DC link undervoltage fault. - Supply voltage too low, producing voltage on the
DC link ( S2.7.1) below the minimum value:
Ud < 203 V - Supply voltage 200 V.
Ud < 210 V - Supply voltage 208-240 V.
Ud < 385 V - Supply voltage 380 V.
Ud < 405 V - Supply voltage 400-415 V.
Ud < 446 V - Supply voltage 440-460 V.
Ud < 487 V - Supply voltage 480 V.
Ud < 507 V - Supply voltage 500-525 V.
Ud < 557 V - Supply voltage 550-600 V.
Ud < 669 V - Supply voltage 660-690 V.
- Phase loss at the input.
- Fault on the pre-charge circuit.
- Parameter C1.1.2 with a value above the rated line
voltage.
F022:
DC Link Overvoltage DC link overvoltage fault. - Supply voltage too high, producing voltage on the
DC link ( S2.7.1) above the maximum value:
Ud > 400 V - Models 200-240 V.
Ud > 800 V - Models 380-480 V.
Ud > 1000 V - Models 500-600 V.
Ud > 1200 V - Models 660-690 V.
- Driven load inertia too high or deceleration ramp too
fast.
- C3.5.2.1 or C3.5.3.2 or C3.6.1 setting is too high.
F025:
Pulse Feedback Error Failure to compare the PWM pulses generated by
the control and the output voltages measured by the
inverter.
Note:
- Reset the inverter and try again.
- Motor is disconnected or motor is small in relation
to the rated current of the inverter connected to the
output.
- Possible defect on the inverter internal circuits.
- Problems in the circuit of the STO safety inputs
(XC2).
F030:
IGBT U Desat Fault of desaturation on the IGBTs of arm U. - Short circuit between the motor phases U and V or
U and W.
F034:
IGBT V Desat Fault of desaturation on the IGBTs of arm V. - Short circuit between the motor phases V and U or
V and W.
F038:
IGBT W Desat Fault of desaturation on the IGBTs of arm W. - Short circuit between the motor phases W and U or
W and V.
F042:
Brake IGBT Desat Fault of desaturation on the dynamic braking IGBT. - Short circuit on the connecting cables of the
dynamic braking.
A046:
High Load on the Motor Motor overload alarm.
Note:
- It can be disabled by setting C7.4.1 = 0 or 2.
- C7.4.3, C7.4.4 and C7.4.5 setting is low for the
motor used.
- Overload on the motor shaft.
A047:
High Load on the IGBTs IGBT overload alarm. - High current at the inverter output:
F048:
Overload on the IGBTs IGBT overload fault. - Current at the inverter output is too high.
A050:
IGBT1 U Overtemp. Alarm of high temperature measured in the
temperature sensors (NTC) of the IGBTs.
Note:
- It can be disabled by C7.5.1.
- High ambient temperature around the inverter (>50
◦
C) and high output current.
- Locked or defective fan.
- Inverter heat sink too dirty.
60 | CFW900