Baldor mn722 manual Inverter Control Board Fault Messages

	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.

MN722 Troubleshooting 5-3