WEG CFW-11 Series Programming Manual Download

Page: 39 / 307

Quick Parameter Reference, Faults and Alarms

0-31

Fault/Alarm

Description

Possible Causes

A050

(1)

IGBT High Temperature U

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 (>50 °C (122 °F))

and output current is too high.

Blocked or defective fan.
Very dirty heatsink.

F051

(1)

IGBT Overtemperature U

A high temperature fault was detected by the NTC
temperature sensors located on the IGBTs.

A053

(12)

High Temperature on
IGBTs V

Alarm of high temperature measured at the
temperature sensors (NTC) of the IGBTs.

Note:

It can be disabled by setting P0353 = 2 or 3.

F054

(12)

Overtemperature on
IGBTs V

Fault of overtemperature measured at the
temperature sensors (NTC) of the IGBTs.

A056

(12)

High Temperature on
IGBTs W

Alarm of high temperature measured at the
temperature sensors (NTC) of the IGBTs.

Note:

It can be disabled by setting P0353 = 2 or 3.

F057

(12)

Overtemperature on
IGBTs W

Fault of overtemperature measured at the
temperature sensors (NTC) of the IGBTs.

F062

(15)

Thermal Imbalance

Fault of power module temperature imbalance.

The temperature difference between IGBT modules of the

same phase (U, V, W) was above 15 °C (59 ° F).

The temperature difference between IGBT modules of

different phases (U and V, U and W, V and W) was above
20 °C (68 ° F).

The temperature difference between rectifier modules of

different phases (R and S, R and T, S and T) was above
20 °C (68 ° F).

F065

Encoder Signal Fault (SW)

Feedback obtained via encoder does not match the
commanded speed.
The fault can be disabled via parameter P0358

Wiring between encoder and encoder interface accessory

interrupted.

  Encoder is defective.
  Encoder coupling to the motor is broken.
  Inverter operating in current limit (In case the application

needs to run in such condition, this fault should be
disabled via parameter P0358).

F066
Encoder Signal Fault (SW)

Feedback obtained via encoder does not match the
commanded speed.
The fault can be disabled via parameter P0358

Wiring between encoder and encoder interface accessory

interrupted.

Encoder is defective.
Encoder coupling to the motor is broken.

I nverter operating in current limit (In case the application

needs to run in such condition, this fault should be
disabled via parameter P0358).

F067

Incorrect Encoder/
Motor Wiring

Fault related to the phase relation of the encoder
signals, if P0202 = 4 and P0408 = 0, 2, 3 or 4.

Note:

- It is not possible to reset this fault (when P0408>1).
- In this case, turn off the power supply, solve the

problem, and then turn it on again.

- When P0408 = 0, it is possible to reset this fault.
This fault could be disabled by means of parameter
P0358.
In this case it is possible to reset this fault.

  Output motor cables U, V, W are inverted.
  Encoder channels A and B are inverted.
  Encoder was not properly mounted.
  Motor with locked rotor or dragging at the start.

F070

(4)

Overcurrent /
Short-circuit

Overcurrent or short-circuit detected at the output,
in the DC bus, or at the braking resistor.

Short-circuit between two motor phases.
Short-circuit between the connection cables of the

dynamic braking resistor.

IGBT modules are shorted.

F071

Output Overcurrent

The inverter output current was too high for too long.

Excessive load inertia or acceleration time too short.
Settings of P0135 or P0169, P0170, P0171, and P0172

are too high.