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motor. Ground fault is issued if the deviation of the 2 currents is too large. The current going out of the drive must be the same as
the current going into the drive.
Troubleshooting
Remove power to the drive and repair the ground fault.
Check for ground faults in the motor by measuring the resistance to ground of the motor cables and the motor with a megohm-
meter.
Reset any potential individual offset in the 3 current sensors in the drive. Perform a manual initialization or perform a complete
AMA. This method is most relevant after changing the power card.
9.4.16 ALARM 15, Hardware Mismatch
Cause
A fitted option is not operational with the present control card hardware or software.
Troubleshooting
Record the value of the following parameters and contact Danfoss.
Parameter 15-40 FC Type
.
Parameter 15-41 Power Section
.
Parameter 15-42 Voltage
.
Parameter 15-43 Software Version
.
Parameter 15-45 Actual Typecode String
.
Parameter 15-49 SW ID Control Card
.
Parameter 15-50 SW ID Power Card
.
Parameter 15-60 Option Mounted
.
Parameter 15-61 Option SW Version
(for each option slot).
9.4.17 ALARM 16, Short Circuit
Cause
There is short-circuiting in the motor or motor wiring.
Troubleshooting
Disconnect power before proceeding.
Remove the power to the drive and repair the short circuit.
9.4.18 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] Off
.
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.
9.4.19 WARNING/ALARM 20, Temp. Input Error
Cause
The temperature sensor is not connected.
AQ262139143212en-000301 / 130R0879 | 145
Danfoss A/S © 2021.10
Maintenance, Diagnostics, and
Troubleshooting
VLT® AutomationDrive FC 302
Operating Guide
Summary of Contents for D9h
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