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Section 1
General Information
Troubleshooting 5-3MN722
Table 5-2 Inverter Control Board Fault Messages
FAULT MESSAGE DESCRIPTION
Current Sens FLT Defective phase current sensor or open circuit detected between control board and current
sensor.
DC Bus High Bus over voltage condition occurred.
DC Bus Low Bus under voltage condition occurred.
Encoder Loss Encoder coupling slipping or broken; noise on encoder lines, encoder power supply loss or
defective encoder.
External Trip An open circuit on J1-16 typically indicating an external over temperature condition.
Following Error Excessive following error detected between command and feedback signals.
GND FLT Low impedance path detected between an output phase and ground.
INT Over-Temp Temperature of control heatsink exceeded safe level.
Invalid Base ID Control does not recognize power base ID.
Inverter Base ID Control board installed on power base without current feedback.
Line Regen FLT Indicates a converter section fault.
Logic Supply FLT Logic power supply not working properly.
Lost User Data Battery backed RAM parameters have been lost or corrupted.
When fault cleared (Reset), the control should reset to factory preset values.
Low INIT Bus V Insufficient bus voltage on startup.
Memory Error EEPROM error occurred. Contact Baldor.
New Base ID Control board sensed a different power base since last time it was powered up.
No Faults Fault log is empty.
No EXB Installed Programmed parameter requires an expansion board.
Over Current FLT Instantaneous over current condition detected by bus current sensor.
Overload - 1 min Output current exceeded 1 minute rating.
Overload - 3 sec Output current exceeded 3 second rating.
Over speed Motor RPM exceeded 110% of programmed MAX Motor Speed.
mP Reset
Power cycled before the residual Bus voltage reached 0VDC.
PWR Base FLT Desaturation of power device occurred or bus current threshold exceeded.
Resolver Loss Resolver feedback problem is indicated (if resolver used).
Torque Prove FLT Unbalanced current between all 3 motor phases.
User Fault Text Custom software operating fault occurred.