Danfoss VLT FC 103 User Manual

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9.3.17 ALARM 16, Short Circuit
Cause
There is short-circuiting in the motor or motor wiring.
Troubleshooting
W A R N I N G
HIGH VOLTAGE
AC drives contain high voltage when connected to AC mains input, DC supply, or load sharing. Failure to perform installation,
start-up, and maintenance by qualied personnel can result in death or serious injury.
Only qualied personnel must perform installation, start-up, and maintenance.
Disconnect power before proceeding.
Remove the power to the drive and repair the short circuit.
9.3.18 WARNING/ALARM 17, Control Word Timeout
Cause
There is no communication to the drive. The warning is only active when parameter 8-04 Control Word Timeout Function is NOT set to
[0] O.
If parameter 8-04 Control Word Timeout Function is set to [5] Stop and trip, a warning appears, and the drive ramps down to a stop and
shows an alarm.
Troubleshooting
Check the connections on the serial communication cable.
Increase parameter 8-03 Control Word Timeout Time.
Check the operation of the communication equipment.
Verify that proper EMC installation was performed.
9.3.19 WARNING/ALARM 20, Temp. Input Error
Cause
The temperature sensor is not connected.
9.3.20 WARNING/ALARM 21, Parameter Error
Cause
The parameter is out of range. The parameter number is shown in the display.
Troubleshooting
Set the aected parameter to a valid value.
9.3.21 WARNING 23, Internal Fan Fault
Cause
The fan warning function is a protective function that checks if the fan is running/mounted. The fan warning can be disabled in
parameter 14-53 Fan Monitor ([0] Disabled).
For drives with DC fans, a feedback sensor is mounted in the fan. If the fan is commanded to run and there is no feedback from the
sensor, this alarm appears. For drives with AC fans, the voltage to the fan is monitored.
Troubleshooting
Check for proper fan operation.
Cycle power to the drive and check that the fan operates briey at start-up.
Check the sensors on the control card.
9.3.22 WARNING 24, External Fan Fault
Cause
The fan warning function is a protective function that checks if the fan is running/mounted. The fan warning can be disabled in
parameter 14-53 Fan Monitor ([0] Disabled).
For drives with DC fans, a feedback sensor is mounted in the fan. If the fan is commanded to run and there is no feedback from the
sensor, this warning appears. For drives with AC fans, the voltage to the fan is monitored.
AQ357954340588en-000201 / 130R0881126 | Danfoss A/S © 2020.09
Maintenance, Diagnostics, and
Troubleshooting
VLT® Refrigeration Drive FC 103
Operating Guide

Danfoss VLT FC 103 Specifications

General

Brand	Danfoss
Model	VLT FC 103
Category	DC Drives
Language	English