Danfoss VLT AutomationDrive FC 302 Operating Manual page 104

Operating Guide | VLT® AutomationDrive FC 302
8.4.3 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.
- VLT® General Purpose I/O MCB 101 terminals 11 and 12 for signals, terminal 10 common.
- VLT® Analog I/O Option MCB 109 terminals 1, 3, and 5 for signals, terminals 2, 4, and 6 common.
• Check that the drive programming and switch settings match the analog signal type.
• Perform an input terminal signal test.
8.4.4 WARNING/ALARM 3, No Motor
Cause
No motor is connected to the output of the drive.
8.4.5 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.
8.4.6 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.
8.4.7 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.
104 | Danfoss A/S © 2019.12
Maintenance, Diagnostics, and
Troubleshooting
AQ275652476278en-000101 / 130R0709