Section 1
General Information
5-8 Troubleshooting
MN722
Table 5-3 Converter Section Troubleshooting
Continued
INDICATION
POSSIBLE CAUSE
CORRECTIVE ACTION
Over Current FLT
Possible converter transistor failure.
Check transistors for shorted junctions.
Incorrect inductance set in Line
Inductor parameter.
Check inductance parameter value.
Overload FLT
Drive overloaded.
Verify proper sizing of control and motor.
PWR Base FLT
Incorrect phase connections.
Check connections for proper phasing of EK drive components as
detailed in Section 3 of this manual.
Excessive current draw.
Disconnect motor wiring and retry test
If fault remains call Baldor
Power device saturated.
Disconnect motor wiring and retry test. If fault remains, call Baldor.
Electrical noise from DC coils.
Install flyback diodes (reverse biased 1N4002 or equivalent)across all
external DC relay coils..
Electrical noise from AC coils.
Install RC snubbers on all external AC coils.
Sync To Line
Incorrect phase connections.
Check connections for proper phasing as detailed in Section 3 of this
manual.
Incorrect frequency detected at
startup.
Check incoming line voltage and frequency.
Summary of Contents for 22H series
Page 5: ...Section 1 General Information iv Table of Contents MN722...
Page 105: ...Section 1 General Information 5 22 Troubleshooting MN722...
Page 109: ...Section 1 General Information 6 4 Manual Tuning the Series 22H Control MN722...
Page 137: ...Section 1 General Information A 8 Appendix A MN722...
Page 138: ...Appendix B Appendix B 1 MN722...
