Danfoss VACON 20 Drive

Danfoss VACON 20 Drive Fault Codes:

Fault Code and MeaningCause and Remedy
1

Overcurrent
Cause:

Frequency converter has detected too high a current (>4*In) in the motor cable:

  • sudden heavy load increase

  • short circuit in motor cables

  • unsuitable motor




Remedy:


  • Check loading.

  • Check motor size.

  • Check cables.
2

Overvoltage
Cause:

The DC-link voltage has exceeded the internal safety limit:

  • deceleration time is too short

  • high overvoltage peaks in mains




Remedy:

Increase the deceleration time (Par.4.3 or Par.4.6).
3

Earth fault
Cause:

Current measurement has detected extra leakage current at start:

  • insulation failure in cables or motor




Remedy:

Check motor cables and motor.
8

System fault
Cause:


  • component failure

  • faulty operation




Remedy:

Reset the fault and restart.

If the fault re-occurs, contact the distributor near to you.

NOTE! If fault F8 occurs, find out the subcode of the fault from the Fault History menu under Id xxx!
9

Under voltage
Cause:

The DC-link voltage has gone below the internal safety limit:

  • most probable cause: supply voltage is too low

  • frequency converter internal fault

  • Power outages




Remedy:

In case of temporary supply voltage break reset the fault and restart the frequency converter.

Check the supply voltage. If it is adequate, an internal failure has occurred.

Contact the distributor near to you.
10

Input phase fault
Cause:

Input phase is missing.



Remedy:

Check supply voltage, fuses and cable.
11

Output phase fault
Cause:

Current measurement has detected that there is no current in one motor phase.



Remedy:

Check motor cable and motor.
13

Frequency converter under temperature
Cause:

Heat sink temperature is under -10 °C.



Remedy:

Check the ambient temperature.
14

Frequency converter over temperature
Cause:

Heat sink is overheated.



Remedy:


  • Check that the cooling air flow is not blocked.

  • Check the ambient temperature.

  • Clean the heatsink dust.

  • Make sure that the switching frequency is not too high in relation to ambient temperature and motor load.
15

Motor stalled
Cause:

Motor stall protection has tripped.



Remedy:

Check that the motor is able to rotate freely.
16

Motor over temperature
Cause:

Motor overheating has been detected by frequency converter motor temperature model. Motor is overloaded.



Remedy:

Decrease the motor load. If no motor overload exists, check the temperature model parameters.
17

Motor underload
Cause:

Motor underload protection has tripped.



Remedy:

Check motor and load, e.g. for broken belts or dry pumps.
22

EEPROM checksum fault
Cause:

Parameter save fault:

  • faulty operation

  • component failure




Remedy:

Contact the distributor near to you.

NOTE! If fault F8 occurs, find out the subcode of the fault from the Fault History menu under Id xxx!
25

Microcontroller watchdog fault
Cause:


  • faulty operation

  • component failure




Remedy:

Reset the fault and restart.

If the fault re-occurs, contact the distributor near to you.
27

Back EMF protection
Cause:

Drive has detected that the magnetized motor is running in start situation.

  • A rotating PM-motor




Remedy:

Make sure that there is no rotating PM-motor when the start command is given.
29

Thermistor fault
Cause:

The thermistor input of option board has detected increase of the motor temperature.



Remedy:

Check motor cooling and loading.

Check thermistor connection (If thermistor input of the option board is not in use it has to be short circuited).
34

Internal bus communication
Cause:

Ambient interference or defective hardware.



Remedy:

If the fault re-occurs, contact the distributor near to you.
35

Application fault
Cause:

Application is not working properly.



Remedy:

Contact the distributor near to you.

NOTE! If fault F8 occurs, find out the subcode of the fault from the Fault History menu under Id xxx!
41

IGBT Overtemperature
Cause:

Overtemperature alarm is issued when the IGBT switch temperature exceeds 110 °C.



Remedy:

Check loading.

Check motor size.

Make identification run.
50

Analog input select 20% – 100% (selected signal range 4 to 20 mA or 2 to 10 V)
Cause:

Current at the analogue input is < 4mA; Voltage at the analogue input is < 2 V.

  • control cable is broken or loose.

  • signal source has failed.




Remedy:

Check the current loop circuitry.
51

External fault
Cause:

Digital input fault. Digital input has been programmed as external fault input and this input is active.



Remedy:

Remove the external device fault.
52

Door Panel fault
Cause:

Control place is keypad, but door panel has been disconnected.



Remedy:

Check the connection between optional board and API. If connection is correct, contact the nearest Vacon distributor.
53

Fieldbus fault
Cause:

The data connection between the fieldbus Master and the fieldbus of the drive has broken.



Remedy:

Check installation.

If installation is correct, contact the nearest Vacon distributor.
54

Slot fault
Cause:

The connection between optional board and API has been broken.



Remedy:

Check board and slot.

Contact the nearest Vacon distributor.
55

Wrong run fault (FWD/REV conflict)
Cause:

Run forward and backward are high at the same time.



Remedy:

Check I/O control signal 1 and I/O control signal 2.
57

Identification fault
Cause:

Identification run has failed.



Remedy:

Run command was removed before completion of identification run.

Motor is not connected to frequency converter.

There is load on motor shaft.
63

Quick Stop
Cause:

Quick Stop activated.



Remedy:

The drive has been stopped with Quick Stop digital input or Quick Stop command by fieldbus.
111

Temperature fault
Cause:

Over low or over high temperature.



Remedy:

Check temperature signal from OPTBH board.