Baldor mn722 manual Converter Control Board Fault Messages, Fault Message Description

	Table 5-1 Converter 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.
GND FLT	Low impedance path detected between an output phase and ground.
High INIT CUR	Phasing between main power connections, zero crossing detectors, line reactor and
	control does not match.
ID:No Feedback	Control board installed in power base that does not have current feedback and current
	feedback is required.
INT Over-Temp	Temperature of control heatsink exceeded safe level.
Invalid Base ID	Control does not recognize power base ID.
Logic Supply FLT	Logic power supply not working properly.
Lost AB Phase	Missing phase detected by mP.
Lost BC Phase	Missing phase detected by mP.
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.
mP Reset	Watchdog timer detected error.
New Base ID	Control board sensed a different power base since last time it was powered up.
No Faults	Fault log is empty.
Overcurrent FLT	Instantaneous over current condition detected by bus current sensor.
Overload	Output current exceeded allowable rating.
PWR Base FLT	Desaturation of power device occurred or bus current threshold exceeded.
Sync To Line	Incorrect line phasing or frequency detected on startup.

5-2 Troubleshooting MN722