Baldor 22H series Installation & Operating Manual page 91

Section 1
General Information
INDICATION
Over Current FLT Possible converter transistor failure. Check transistors for shorted junctions.
Incorrect inductance set in Line
Inductor parameter.
Overload FLT Drive overloaded.
PWR Base FLT Incorrect phase connections.
Excessive current draw.
Power device saturated.
Electrical noise from DC coils.
Electrical noise from AC coils.
Sync To Line Incorrect phase connections.
Incorrect frequency detected at
startup.
5-8 Troubleshooting
Table 5-3 Converter Section Troubleshooting
POSSIBLE CAUSE CORRECTIVE ACTION
Check inductance parameter value.
Verify proper sizing of control and motor.
Check connections for proper phasing of EK drive components as
detailed in Section 3 of this manual.
Disconnect motor wiring and retry test. If fault remains, call Baldor. Disconnect motor wiring and retry test
Install flyback diodes (reverse biased 1N4002 or equivalent)across all
external DC relay coils..
Install RC snubbers on all external AC coils.
Check connections for proper phasing as detailed in Section 3 of this
manual.
Check incoming line voltage and frequency.
Continued
If fault remains call Baldor
MN722