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VACON® 3000
Application Guide
8.2.2.4 Fault Code 2, ID 14 - DC- Overvoltage
Cause
The negative DC-link voltage is higher than the limits.
•
too short a deceleration time
•
high overvoltage spikes in the supply
Troubleshooting
•
Set the deceleration time longer (P3.4.1.3 and P3.4.2.3).
•
Use a brake chopper. It is available as an option.
•
Activate the overvoltage controller.
•
Check the input voltage.
8.2.2.5 Fault Code 2, ID 16 - DC-Link Overvoltage
Cause
The DC-link voltage is too high for the motor.
Troubleshooting
•
Set the deceleration time longer (P3.4.1.3 and P3.4.2.3).
•
Use a brake chopper. It is available as an option.
•
Activate the overvoltage controller.
•
Check the input voltage.
8.2.3 Fault Code 3 - Earth Fault
8.2.3.1 Fault Code 3, ID 20 - Earth Fault (Hardware Fault)
Cause
The ground current sensor has detected a too high current flowing to the ground or the current measurement has detected that
the sum of output phase currents is not zero (0 A).
•
an insulation malfunction in the cables or the motor
•
a filter (dU/dt, sine) malfunction
Troubleshooting
•
Check the motor cables and the motor.
•
Check the filters.
8.2.3.2 Fault Code 3, ID 21 - Earth fault (Software Fault)
Cause
The ground current sensor has detected a too high current flowing to the ground or the current measurement has detected that
the sum of output phase currents is not zero (0 A).
•
an insulation malfunction in the cables or the motor
•
a filter (dU/dt, sine) malfunction
Troubleshooting
•
Check the motor cables and the motor.
•
Check the filters.
8.2.3.3 Fault Code 3, ID 22 - Ground Fault
Cause
The DC link neutral to ground voltage is higher than the fault level.
Troubleshooting
•
Check the motor cables and the motor.
•
Check the filters.
Danfoss A/S © 2021.09
Fault tracing
AB319735759636en-000101 / DPD01822 | 271
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