Danfoss VLT 2800 Drive

Danfoss VLT 2800 Drive Fault Codes:

Fault Code and MeaningCause and Remedy
WARNING/ALARM 2

Live zero fault
Cause:

The voltage or current signal on terminal 53 or 60 is below 50% of the preset value in parameter 309 or 315 Terminal, min. scaling.



Remedy:

Check the signal connections and parameter settings (309 or 315).
WARNING/ALARM 4

AC line phase fault
Cause:

Missing phase on AC line supply side. This fault is only active in 3-phase AC line.



Remedy:

Check the supply voltage to the adjustable frequency drive.
WARNING 5

Voltage warning high
Cause:

The DC bus voltage (VDC) is higher than the Voltage warning high limit.



Remedy:


  • Check whether the supply voltage matches the rating of the adjustable frequency drive.

  • Check if motor frequency is reduced too quickly (ramp down time too short).
WARNING 6

Voltage warning low
Cause:

The DC bus voltage (VDC) is lower than the Voltage warn low limit.



Remedy:

Check whether the supply voltage matches the rating of the adjustable frequency drive.
WARNING/ALARM 7

Overvoltage
Cause:

The DC bus voltage (VDC) is higher than the inverter’s Overvoltage limit. Can occur if motor frequency is reduced too quickly.



Remedy:


  • Check supply voltage.

  • Increase ramp-down time.
WARNING/ALARM 8

Undervoltage
Cause:

The DC bus voltage is lower than the inverter’s Undervoltage limit.



Remedy:

Check whether the supply voltage fits the adjustable frequency drive (See Technical data).
WARNING/ALARM 9

Inverter overload
Cause:

Electronic thermal inverter protection indicates that the drive is close to disconnecting due to overloading (output current too high for too long).



Remedy:

Remove the overload condition to the drive. The drive cannot be reset until the counter is below 90%.
WARNING/ALARM 10

Motor overloaded
Cause:

The motor is too hot according to the electronic thermal inverter protection. The motor is being overloaded by more than 100% for too long.



Remedy:

Check that motor parameters 102–106 are set correctly.
WARNING/ALARM 11

Motor thermistor
Cause:

The motor is too hot or the thermistor/thermistor connection is cut off.



Remedy:

Check that the PTC thermistor has been correctly connected between terminal 18, 19, 27 or 29 (digital input) and terminal 50 (+10 V supply).
WARNING/ALARM 12

Current limit
Cause:

The output current is greater than the value in parameter 221 Current Limit I_LIM.



Remedy:

Check load conditions. The drive will trip after a set period (parameter 409).
WARNING/ALARM 13

Overcurrent
Cause:

The inverter’s peak current limit (approx. 200% of rated output current) has been exceeded.



Remedy:

Switch off the drive and check that the motor shaft can be turned and that the motor size fits the drive.
ALARM 14

Ground fault
Cause:

There is a discharge from the output phases to ground, either in the cable between the drive and the motor, or in the motor.



Remedy:

Turn off the adjustable frequency drive and remove the ground fault.
ALARM 15

Switch mode fault
Cause:

Fault in switch mode power supply (internal supply).



Remedy:

Contact your Danfoss supplier.
ALARM 16

Short-circuit
Cause:

There is a short-circuit on the motor terminals or in the motor.



Remedy:

Disconnect the AC line supply to the adjustable frequency drive and remove the short-circuit.
WARNING/ALARM 17

Serial communication timeout
Cause:

There is no serial communication to the adjustable frequency drive.



Remedy:

Parameter 513 Bus time interval could possibly be increased.
WARNING/ALARM 18

HPFB bus timeout
Cause:

There is no serial communication to the adjustable frequency drive’s communication option card.



Remedy:

Parameter 803 Bus time interval could possibly be increased.
WARNING 33

Out of frequency range
Cause:

The output frequency has reached Output frequency low limit (parameter 201) or Output frequency high limit (parameter 202).



Remedy:

Check process regulation/closed loop settings.
WARNING/ALARM 34

HPFB communication fault
Cause:

Communication fault only occurs in Profibus versions.



Remedy:

Check Profibus communication.
ALARM 35

Inrush fault
Cause:

The drive has been connected to the AC line supply too many times within 1 minute.



Remedy:

Limit the frequency of AC line power cycling.
WARNING/ALARM 36

Overtemperature
Cause:

Heatsink temperature is above limit (75°C – 85°C or 167°F – 185°F depending on unit). Trip occurs at 92°C – 100°C.

Potential causes:

  • Ambient temperature too high.

  • Motor cable too long.

  • AC line voltage too high.





Remedy:

Ensure ambient temperature is within limits and check installation conditions (cable length, voltage).
ALARM 37

Internal fault number 0
Cause:

Communication fault between control card and BMC2.



Remedy:

Carry out a power cycle. If fault persists, contact supplier.
ALARM 38

Internal fault number 1
Cause:

Flash EEPROM fault on control card.



Remedy:

Carry out a power cycle. If fault persists, contact supplier.
ALARM 39

Internal fault number 2
Cause:

RAM fault on control card.



Remedy:

Carry out a power cycle. If fault persists, contact supplier.
ALARM 40

Internal fault number 3
Cause:

Calibration constant error in EEPROM.



Remedy:

Carry out a power cycle. If fault persists, contact supplier.
ALARM 41

Internal fault number 4
Cause:

Data values error in EEPROM.



Remedy:

Carry out a power cycle. If fault persists, contact supplier.
ALARM 42

Internal fault number 5
Cause:

Fault in motor parameter database.



Remedy:

Carry out a power cycle. If fault persists, contact supplier.
ALARM 43

Internal fault number 6
Cause:

General power card fault.



Remedy:

Carry out a power cycle. If fault persists, contact supplier.
ALARM 44

Internal fault number 7
Cause:

Minimum software version of control card or BMC2.



Remedy:

Carry out a power cycle. If fault persists, contact supplier.
ALARM 45

Internal fault number 8
Cause:

I/O fault (digital input/output, relay or analog input/output).



Remedy:

When restarting after an alarm 38–45, the drive will display alarm 37. In parameter 615 the actual alarm code can be read.
ALARM 50

AMT not possible
Cause:

Possibilities:

  • Calculated Rs value outside permitted limits.

  • Motor current in at least one phase is too low.

  • Motor is too small for AMT calculations.





Remedy:

Check motor selection and connection.
ALARM 51

AMT Fault re. nameplate data
Cause:

There is inconsistency in the registered motor data.



Remedy:

Check the motor data for the relevant setup.
ALARM 52

AMT faulty motor phase
Cause:

The motor current in at least one of the motor phases is too low.



Remedy:

Check motor phases and connections.
ALARM 53

AMT motor too small
Cause:

The motor used is probably too small for the AMT calculations to be carried out.



Remedy:

Verify motor size compatibility.
ALARM 54

AMT incorrect motor
Cause:

AMT cannot be performed on the motor being used.



Remedy:

Check motor type.
ALARM 55

AMT timeout
Cause:

The calculations are taking too long, possibly due to noise in the motor cables.



Remedy:

Check motor cabling and grounding.
ALARM 56

AMT warning during AMT
Cause:

An adjustable frequency drive warning is given while AMT is being performed.



Remedy:

Resolve the underlying warning.
WARNING 99

Locked
Cause:

The control panel functions have been locked via parameter 018.



Remedy:

Unlock via parameter 018.