Danfoss VLT AutomationDrive EZ FC 321 Programming Manual page 356

VLT® AutomationDrive EZ FC 321
Programming Guide
The following warning and alarm information defines each warning or alarm condition, provides the probable cause for the condi-
tion, and entails a remedy or troubleshooting procedure.
5.2.1 WARNING 1, 10 Volts Low
Cause
The control card voltage is less than 10 V from terminal 50. Remove some of the load from terminal 50, as the 10 V supply is overloa-
ded. Maximum 15 mA or minimum 590 Ω.
A short circuit in a connected potentiometer or incorrect wiring of the potentiometer can cause this condition.
Troubleshooting
• Remove the wiring from terminal 50. If the warning clears, the problem is with the wiring. If the warning does not clear, replace
the control card.
5.2.2 WARNING/ALARM 2, Live Zero Error
Cause
This warning or alarm only appears if programmed in parameter 6-01 Live Zero Timeout Function. The signal on 1 of the analog inputs
is less than 50% of the minimum value programmed for that input. Broken wiring or a faulty device sending the signal can cause
this condition.
Troubleshooting
• Check connections on all analog mains terminals.
- Control card terminals 53 and 54 for signals, terminal 55 common.
• Check that the drive programming and switch settings match the analog signal type.
• Perform an input terminal signal test.
5.2.3 WARNING/ALARM 3, No Motor
Cause
No motor is connected to the output of the drive.
5.2.4 WARNING/ALARM 4, Mains Phase Loss
Cause
A phase is missing on the supply side, or the mains voltage imbalance is too high. This message also appears for a fault in the input
rectifier. Options are programmed in parameter 14-12 Function at Mains Imbalance.
Troubleshooting
• Check the supply voltage and supply currents to the drive.
5.2.5 WARNING 5, DC Link Voltage High
Cause
The DC-link voltage (DC) is higher than the high-voltage warning limit. The limit depends on the drive voltage rating. The unit is still
active.
5.2.6 WARNING 6, DC Link Voltage Low
Cause
The DC-link voltage (DC) is lower than the low-voltage warning limit. The limit depends on the drive voltage rating. The unit is still
active.
5.2.7 WARNING/ALARM 7, DC Overvoltage
Cause
If the DC-link voltage exceeds the limit, the drive trips after a certain time.
Troubleshooting
• Extend the ramp time.
• Change the ramp type.
•
Activate the functions in parameter 2-10 Brake Function.
•
Increase parameter 14-26 Trip Delay at Inverter Fault.
356 | Danfoss A/S © 2021.08
Troubleshooting
AU373327181955en-000101 / 130R1208