Danfoss VLT AHF 005 User Manual

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9.4.41 ALARM 43, Ext. Supply
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.
9.4.42 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.
9.4.43 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.
9.4.44 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.
9.4.45 WARNING 48, 1.8 V Supply Low
Cause
The 1.8 V DC supply used on the control card is outside of the allowed limits. The supply is measured on the control card.
Troubleshooting
Check for a defective control card.
If an option card is present, check for overvoltage.
AQ262141314214en-000301 / 130R0880144 | Danfoss A/S © 2021.11
Maintenance, Diagnostics, and
Troubleshooting
VLT® HVAC Drive FC 102
Operating Guide

Danfoss VLT AHF 005 Specifications

General

Brand	Danfoss
Model	VLT AHF 005
Category	DC Drives
Language	English