Danfoss VLT 5000 Fault codes 2
Hi everyone,
Motor runs unevenly:
- Check if the VFD settings are correct. Adjust motor data settings if needed.
- If adjusting settings doesn't help, contact Danfoss for support.
Motor does not run:
- Check the display for a backlight. If there's a backlight, look for any fault messages and refer to the Warnings section.
- If there's no backlight, ensure the VFD is connected to the power supply. If it is, proceed to the next step.
Motor does not brake:
- Refer to the manual for instructions on controlling the brake function.
No message or backlight in display:
- Check if the pre-fuses for the VFD have blown. If they have, contact Danfoss.
- If the fuses are okay, check for an overloaded control card. Disconnect control signal plugs and see if the fault disappears.
Motor stopped, light in display, but no fault report:
- Try starting the VFD by pressing the [START] button.
- If the display is frozen, check cable connections. Ensure the motor is connected and all phases are okay.
- Set the VFD for local operation and adjust the reference value. Check if the motor runs. If not, contact Danfoss.
ALARM 14:
Earth fault (Earth fault):
There is a discharge from the output phases to earth, either in the cable between the frequency converter and the motor or in the motor itself. Turn off the frequency converter and remove the earth fault.
ALARM 15:
Switch mode fault (SWITCH MODE FAULT):
Fault in the switch mode power supply (internal ± 15 V supply). Contact your Danfoss supplier.
ALARM 16:
Short-circuiting (CURR.SHORT CIRCUIT):
There is short-circuiting on the motor terminals or in the motor itself. Turn off the frequency converter and remove the short-circuit.
WARNING/ALARM 17:
Standard bus timeout (STD BUS TIMEOUT):
There is no communication to the frequency converter. The warning will only be active when parameter 514 has been set to another value than OFF. If parameter 514 has been set to stop and trip, it will first give a warning and then ramp down until it trips, while giving an alarm. Parameter 513 Bus time interval could possibly be increased.
WARNING/ALARM 18:
HPFB bus timeout (HPFB BUS TIMEOUT):
There is no communication with the frequency converter. The warning will only be active when parameter 804 has been set to another value than OFF. If parameter 804 has been set to Stop and trip, it will first give a warning and then ramp down until it trips, while giving an alarm. Parameter 803 Bus time interval could possibly be increased.
WARNING 19:
Fault in the EEprom on the power card (EE ERROR POWER CARD):
There is a fault on the power card EEPROM. The frequency converter will continue to function, but is likely to fail at the next power-up. Contact your Danfoss supplier.
WARNING 20:
Fault in the EEprom on the control card (EE ERROR CTRL CARD):
There is a fault in the EEPROM on the control card. The frequency converter will continue to function, but is likely to fail at the next power-up. Contact your Danfoss supplier.
ALARM 21:
Auto-optimisation OK (AUTO MOTOR ADAPT OK):
The automatic motor tuning is OK and the frequency converter is now ready for operation.
ALARM 22:
Auto-optimisation not OK (AUTO MOT ADAPT FAIL):
A fault has been found during automatic motor adaptation. The text shown in the display indicates a fault message. The figure after the text is the error code, which can be seen in the fault log in parameter 615. Possible error codes include:
- CHECK P.103,105 [0]
- LOW P.105 [1]
- ASYMMETRICAL IMPEDANCE [2]
- MOTOR TOO BIG [3]
- MOTOR TOO SMALL [4]
- TIME OUT [5]
- INTERRUPTED BY USER [6]
- INTERNAL FAULT [7]
- LIMIT VALUE FAULT [8]
- MOTOR ROTATES [9]
WARNING/ALARM 23:
Fault during brake test (BRAKE TEST FAILED):
The brake test is only run after power-up. If Warning has been selected in parameter 404, the warning will come when the brake test finds a fault. If Trip has been selected in parameter 404, the frequency converter will trip when the brake test finds a fault. The brake test may fail for reasons such as no brake resistor connected or fault in the connections; defective brake resistor or defective brake transistor. A warning or alarm will mean that the brake function is still active.
WARNING 25:
Brake resistor fault (BRAKE RESISTOR FAULT):
The brake resistor is monitored during operation, and if it short-circuits, the brake function is disconnected, and the warning appears. The frequency converter will still be able to work, although without the brake function. Turn off the frequency converter and replace the brake resistor.
ALARM/WARNING 26:
Brake resistor power 100% (BRAKE PWR WARN 100%):
The power transmitted to the brake resistor is calculated as a percentage, as a mean value over the last 120 sec., based on the resistance value of the brake resistor (parameter 401) and the intermediate circuit voltage. The warning is active when the dissipated braking power is higher than 100%. If Trip [2] has been selected in parameter 403, the frequency converter will cut out while giving this alarm.
+ Danfoss VLT 5000 user manual
+ Danfoss VLT 5000 Fault index >>
+ Danfoss Main Page (2) >>
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