Danfoss VLT 5000 Fault codes 3
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.
WARNING 27:
Brake transistor fault (BRAKE IGBT FAULT):
The brake transistor 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 run, but since the brake transistor has short-circuited, substantial power will be transmitted to the brake resistor, even if it is inactive. Turn off the frequency converter and remove the brake resistor.
Warning: There is a risk of substantial power being transmitted to the brake resistor if the brake transistor has short-circuited.
ALARM 29:
Heat sink temperature too high (HEAT SINK OVER TEMP.):
If the enclosure is IP 00 or IP 20/NEMA 1, the cut-out temperature of the heat sink is 90°C. If IP 54 is used, the cut-out temperature is 80°C. The tolerance is ± 5°C. The temperature fault cannot be reset until the temperature of the heat sink is below 60°C. The fault could be due to ambient temperature too high, too long motor cable, or too high switching frequency.
ALARM 30:
Motor phase U missing (MISSING MOT.PHASE U):
Motor phase U between frequency converter and motor is missing. Turn off the frequency converter and check motor phase U.
ALARM 31:
Motor phase V missing (MISSING MOT.PHASE V):
Motor phase V between frequency converter and motor is missing. Turn off the frequency converter and check motor phase V.
ALARM 32:
Motor phase W missing (MISSING MOT.PHASE W):
Motor phase W between frequency converter and motor is missing. Turn off the frequency converter and check motor phase W.
ALARM 33:
Quick discharge not OK (QUICK DISCHARGE NOT OK):
Check whether a 24 Volt external DC supply has been connected and that an external brake/discharge resistor has been fitted.
WARNING/ALARM 34:
Fieldbus communication fault (FIELDBUS COMMUNICATION FAULT):
The fieldbus on the communication option card is not working.
WARNING 35:
Out of frequency range (OUT OF FREQUENCY RANGE):
This warning is active if the output frequency has reached its Output frequency low limit (parameter 201) or Output frequency high limit (parameter 202). If the frequency converter is in Process control, closed loop (parameter 100), the warning will be active in the display. If the frequency converter is in another mode than Process control, closed loop, bit 008000 Out of frequency range in extended status word will be active, while there will be no warning in the display.
WARNING/ALARM 36:
Mains failure (MAINS FAILURE):
This warning/alarm is only active if the supply voltage to the frequency converter is lost and if parameter 407 Mains fault has been set to another value than OFF. If parameter 407 has been set to Contr. ramp-down trip [2], the frequency converter will first give a warning and then ramp down and trip, while giving an alarm. Check the fuses to the frequency converter.
ALARM 37:
Inverter fault (Inverter fault):
IGBT or the power card is defective. Contact your Danfoss supplier.
WARNING 39:
CHECK P.104,106:
The setting of parameter 102, 104, or 106 is probably wrong. Check the setting and choose Continue' or Stop'.
WARNING 40:
CHECK P.103,105:
The setting of parameter 102, 103, or 105 is probably wrong. Check the setting and choose Continue' or Stop'.
WARNING 41:
MOTOR TOO BIG:
The motor used is probably too big for AMA to be carried out. The setting in parameter 102 may not match the motor. Check the motor and choose Continue' or Stop'.
WARNING 42:
MOTOR TOO SMALL:
The motor used is probably too small for AMA to be carried out. The setting in parameter 102 may not match the motor. Check the motor and choose Continue' or Stop'.
ALARM 43:
Brake fault (BRAKE FAULT):
A fault has arisen on the brake. The text shown in the display indicates a fault message. The figure after the text is the fault code that can be seen in the fault log, parameter 615. Possible fault codes include:
- Brake check failed (BRAKE CHECK FAILED) [0]
- Brake resistor short-circuited (BRAKE RESISTOR FAULT) [1]
- Brake IGBT short-circuited (BRAKE IGBT FAULT) [2]
WARNING/ALARM 44:
Encoder loss (ENCODER FAULT):
The encoder signal is interrupted from terminal 32 or 33. Check the connections.
WARNING/ALARM 57:
Overcurrent (OVERCURRENT):
As warning/alarm 13, but in this case, the warning/alarm occurs together with a quick stop.
ALARM 60:
Safety stop (EXTERNAL FAULT):
Terminal 27 (parameter 304 Digital Inputs) has been programmed for a safety interlock [3] and is a logic '0'.
+ Danfoss VLT 5000 user manual
+ Danfoss VLT 5000 Fault index >>
+ Danfoss Main Page (2) >>
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