Danfoss VLT FCD 302 Operating Manual page 55

Operating Guide | VLT® Decentral Drive FCD 302
Troubleshooting, X30/7
Check the load connected to the terminal or remove the short-circuit connection.
l
Check parameter 5-33 Term X30/7 Digi Out (MCB 101) (VLT® General Purpose I/O MCB 101).
l
WARNING 43, Ext. Supply
Cause
VLT® Extended Relay Option MCB 113 is mounted without 24 V DC. Select 1 of the options in the troubleshooting list.
Troubleshooting
Connect a 24 V DC external supply.
l
Specify that no external supply is used via parameter 14-80 Option Supplied by External 24VDC set to [0] No. A change in parameter
l
14-80 Option Supplied by External 24VDC requires a power cycle.
ALARM 45, Earth (Ground) Fault 2
Cause
A ground fault has occurred.
Troubleshooting
Check for proper grounding and loose connections.
l
Check for proper wire size.
l
Check the motor cables for short circuits or leakage currents.
l
ALARM 46, Power Card Supply
Cause
The supply on the power card is out of range. Another reason can be a defective heat sink fan. There are 3 supplies generated by the
switch mode supply (SMPS) on the power card:
24 V.
l
5 V.
l
±18 V.
l
When powered with VLT® 24 V DC Supply MCB 107, only 24 V and 5 V supplies are monitored. When powered with 3-phase mains
voltage, all 3 supplies are monitored.
Troubleshooting
Check for a defective power card.
l
Check for a defective control card.
l
Check for a defective option card.
l
If 24 V DC is used, verify proper supply power.
l
Check for a defective heat sink fan.
l
WARNING/ALARM 47, 24 V Supply Low
Cause
The 24 V DC is measured on the control card.
Troubleshooting
Check for a defective control card.
l
Danfoss A/S © 2025.04
Operating the Drive
AQ267036816112en-000301 / 130R0208 | 55