Danfoss VLT Decentral Drive FCD 302 Operating Manual page 52

VLT® Decentral Drive FCD 302
Operating Guide
• Check the load connected to the terminal, or remove the short-circuit connection.
•
Check parameter 5-32 Term X30/6 Digi out (MCB 101) (VLT® General Purpose I/O MCB 101).
For terminal X30/7:
• Check the load connected to the terminal, or remove the short-circuit connection.
•
Check parameter 5-33 Term X30/7 Digi Out (MCB 101) (VLT® General Purpose I/O MCB 101).
6.8.32 ALARM 43, Ext. Supply
Either connect a 24 V DC external supply or specify that no external supply is used via parameter 14-80 Option Supplied by External
24VDC, [0] No. A change in parameter 14-80 Option Supplied by External 24VDC requires a power cycle.
Cause
VLT® Extended Relay Option MCB 113 is mounted without 24 V DC.
Troubleshooting
Choose 1 of the following:
• Connect a 24 V DC external supply.
• Specify that no external supply is used via parameter 14-80 Option Supplied by External 24VDC, [0] No. A change in parameter
14-80 Option Supplied by External 24VDC requires a power cycle.
6.8.33 ALARM 45, Earth Fault 2
Cause
Ground fault.
Troubleshooting
• Check for proper grounding and loose connections.
• Check for proper wire size.
• Check the motor cables for short circuits or leakage currents.
6.8.34 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.
• 5 V.
• ±18 V.
®
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.
• Check for a defective control card.
• Check for a defective option card.
• If a 24 V DC supply is used, verify proper supply power.
• Check for a defective heat sink fan.
6.8.35 WARNING 47, 24 V Supply Low
Cause
The supply on the power card is out of range.
There are 3 supplies generated by the switch mode supply (SMPS) on the power card:
• 24 V
• 5 V
• ±18 V
Troubleshooting
• Check for a defective power card.
52 | Danfoss A/S © | 2020.07
Maintenance, Diagnostics and
Troubleshooting
AQ267036816112EN-000101 / 130R0208