Vacon VFD Fault code
Active faults menu for Vacon ac drive
The Active faults menu can be entered from the Main menu by pushing the Menu button right when the location indication M4 is visible on the first line of the keypad display.
When a fault brings the frequency converter to a stop, the location indication F1, the fault code, a short description of the fault and the fault type symbol will appear on the display.
addition, the indication FAULT or ALARM is displayed and, in case of a FAULT, the red led on the keypad starts to blink. If several faults occur simultaneously, the list of active faults can be browsed with the Browser buttons.
The memory of active faults can store the maximum of 10 faults in the order of appearance. The display can be cleared with the Reset button and the read-out will return to the same state it was before the fault trip. The fault remains active until it is cleared with the Reset button or with a reset signal from the I/O terminal or fieldbus.
Note! Remove external Start signal before resetting the fault to prevent unintentional restart of the drive.
A (Alarm)
This type of fault is a sign of an unusual operating condition. It does not cause the drive to stop, nor does it require any special actions.
The 'A fault' remains in the display for about 30 seconds.
F (Fault)
An 'F fault' is a kind of fault that makes the drive stop.
Actions need to be taken in order to restart the drive.
AR (Fault Autoreset)
If an 'AR fault' occurs the drive will also stop immediately. The fault is reset automatically and the drive tries to restart the motor. Finally, if the restart is not successful, a fault trip (FT, see below) occurs.
FT (Fault Trip)
If the drive is unable to restart the motor after an AR fault an FT fault occurs. The effect of the 'FT fault' is basically the same as that of the F fault: the drive is stopped.
The fault codes,
Their causes and correcting actions are presented in the table below. The shadowed faults are A faults only. The items written in white on black background present faults for which you can program different responses in the application. See parameter group Protections.
Note: When contacting distributor or factory because of a fault condition, always write down all texts and codes on the keypad display.
1 Overcurrent
Frequency converter has detected too high a current (>4*IH) in the motor cable:
− sudden heavy load increase
− short circuit in motor cables
− unsuitable motor
Subcode in T.14:
S1 = Hardware trip
S2 = Reserved
S3 = Current controller supervision
Check loading.
Check motor.
Check cables. Make identification run.
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2 Overvoltage
The DC-link voltage has exceeded the limits defined.
− too short a deceleration time
− high overvoltage spikes in supply
Subcode in T.14:
S1 = Hardware trip
S2 = Overvoltage control supervision
Make deceleration time longer. Use brake chopper or brake resistor (available as options)
Activate overvoltage controller.
Check input voltage
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3 Earth fault
Current measurement has detected that the sum of motor phase current is not zero.
− insulation failure in cables or motor
Check motor cables and motor.
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5 Charging switch
The charging switch is open, when the START command has been given.
− faulty operation
− component failure
Reset the fault and restart.
Should the fault re-occur, contact the our technical personal.
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6 Emergency stop
Stop signal has been given from the option board.
Check emergency stop circuit.
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7 Saturation trip Various causes:
− defective component
− brake resistor short-circuit or overload
Cannot be reset from the keypad.
Switch off power.
DO NOT RE-CONNECT POWER!
Contact the our technical personal.. If this fault appears simultaneously with Fault 1, check motor cables and motor
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8 System fault - component failure - faulty operation
Note exceptional fault data record.
S7 = Charging switch
S8 = No power to driver card
S9 = Power unit communication (TX)
S10 = Power unit communication (Trip)
S11 = Power unit comm. (Measurement)
Reset the fault and restart.
Should the fault re-occur, Contact the our technical personal..
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9 Undervoltage
DC-link voltage is under the voltage limits defined.
− most probable cause: too low a supply voltage
− frequency converter internal fault
− defect input fuse
− external charge switch not closed
Subcode in T.14:
S1 = DC-link too low during run
S2 = No data from power unit
S3 = Undervoltage control supervision
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 our technical personal..
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10 Input line supervision
Input line phase is missing. Check supply voltage, fuses and cable.
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11 Output phase supervision
Current measurement has detected that there is no current in one motor phase.
Check motor cable and motor.
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12 Brake chopper supervision
− no brake resistor installed
− brake resistor is broken
− brake chopper failure
Check brake resistor and cabling. If the these are ok, the chopper is faulty.
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13 Frequency converter undertemperature
Heatsink temperature is under –10°C
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14 Frequency converter overtemperature
Heatsink temperature is over 90°C (or 77ºC, all FR6 690V drives).
Overtemperature warning is issued when the heatsink temperature exceeds 85°C (72ºC).
Check the correct amount and flow of cooling air.
Check the heatsink for dust.
Check the ambient temperature.
Make sure that the switching frequency is not too high in relation to ambient temperature and motor load.
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15 Motor stalled Motor stall protection has tripped. Check motor and load.
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16 Motor overtemperature
Motor overheating has been detected by frequency converter motor temperature model. Motor is overloaded.
Decrease motor load.
If no motor overload exists, check the temperature model parameters.
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17 Motor underload
Motor underload protection has tripped. Check load.
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18 Unbalance
Unbalance between power modules in parallelled units.
Subcode in T.14:
S1 = Current unbalance
S2 = DC voltage unbalance
Should the fault re-occur, Contact the our technical personal..
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22 EEPROM checksum fault
Parameter save fault
− faulty operation
− component failure
Should the fault re-occur, Contact the our technical personal..
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24 Counter fault
Values displayed on counters are incorrect
25 Microprocessor watchdog fault
− faulty operation
− component failure
Reset the fault and restart.
Should the fault re-occur, Contact the our technical personal..
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26 Start-up prevented
Start-up of the drive has been prevented.
Run request in ON when new application is loaded to the drive
Cancel prevention of start-up if this can be done safely.
Remove Run request
++ Fault time data record
When a fault occurs the information described above in 7.3.4 is displayed. By pushing the Menu button right here you will enter the
Fault time data record menu indicated by T.1-T.13. In this menu, some selected important data valid at the time of the fault are recorded. This feature is intended to help the user or the service person to determine the cause of fault.
The data available are:
T.1 Counted operation days
(Fault 43: Additional code)
T.2 Counted operation hours
(Fault 43: Counted operation days) hh:mm:ss
T.3 Output frequency
(Fault 43: Counted operation hours)
T.4 Motor current A
T.5 Motor voltage V
T.6 Motor power %
T.7 Motor torque %
T.8 DC voltage V
T.9 Unit temperature °C
T.10 Run status
T.11 Direction
T.12 Warnings
T.13 0-speed
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