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10.3.38 Fault Code 38 - External/Customer Control Power Loss
Cause
The external control power is lost.
System default operation: Alarm
Troubleshooting
Check the wiring and voltage of the external control power.
Check that the corresponding switches are closed.
Check that the corresponding relays work normally.
10.3.39 Fault Code 39 - Control Power Loss Overtime
Cause
Both the external control power and the back-up power from the phase-shift transformer are lost simultaneously for more than
30 minutes.
System default operation: Trip
Troubleshooting
Check the wiring and voltage of the external control power.
Check the wiring and voltage of the internal back-up control power.
Check that the corresponding switches are closed.
Check that the corresponding relays work normally.
10.3.40 Fault Code 40 - UPS Undervoltage
Cause
The fault information is reported when the battery voltage is low.
System default operation: Alarm
Troubleshooting
Check if the voltage of each battery is above 12 V.
Check if the switch mode power supply module output voltage is 26 V.
10.3.41 Fault Code 41 - UPS Undervoltage Overtime
Cause
After the external control power and the back-up power from the phase-shift transformer are lost, the UPS undervoltage occurs for
over 1 minute.
System default operation: Trip
Troubleshooting
Check the wiring and voltage of the external control power.
Check the wiring and voltage of the internal back-up control power.
Check that the corresponding switches are closed.
Check that the corresponding relays work normally.
Find the reasons for UPS failure and restore the supply as soon as possible.
10.3.42 Fault Code 42 - HV Cabinet Door Open
Cause
The high-voltage cabinet door is open.
System default operation: Trip
If the drive cabinet door is open before the high-voltage power-on, the closing allowed signal cannot be sent.
If the drive cabinet door is opened during operation, the system stops immediately.
Troubleshooting
Check the state of the drive cabinet doors.
Check the position switch of the cabinet door and its contacts.
AQ363633621020en-000201 / 172F3117 | 101
Danfoss A/S © 2021.06
Fault Tracing
VACON® 1000
Operating Guide
Summary of Contents for VACON 1000
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