Fault Codes - Vacon NX ACTIVE FRONT END II Applications Manual

Arfiff05 Standard AFE-II
10.

FAULT CODES

The fault codes, their causes and correcting actions are presented below.
Note: When contacting distributor or factory because of a fault condition, always write down all texts
and codes on the keypad display. Best way is to send parameter file and service info to Vacon
technical support
This chapter includes all fault codes that are possible. but some faults are not possible in AFE
application. And some faults description may be different when compared to sta ndard frequency
converter.
F1 Over current fault
Drive has detected a high current in the output phase.
S1 = Hardware trip:
Current above 4*Ih
Possible cause and solutions
1. Sudden increase in load
•
Check motor load.
2. Short circuit in cables
•
Check cables.
F2 Overvoltage fault
DC-link voltage has exceeded the drive protection limits.
S1 = Hardware trip.
500 Vac unit DC voltage above 911 Vdc
690 Vac unit DC voltage above 1200 Vdc
S2 = Overvoltage control supervision (only 690 Vac unit).
DC voltage has been above 1100 Vdc for too long.
Possible cause and solutions
1. Too short a deceleration time
•
Increase deceleration time.
•
Use brake chopper and brake resistor.
•
Use Brake chopper unit.
2. High overvoltage spikes in supply
•
Check input voltage.
F3 Earth fault
Earth fault protection ensures that the sum of the phase currents is zero. The over current
protection is always working and protects the frequency converter from earth faults with high
currents.
S1 = Sum of output phase current is not zero
Possible cause and solutions
1. Insulation failure in cables
Local contacts: http://drives.danfoss.com/danfoss-drives/local-contacts/
vacon • 83