Baldor MN735 manual General Failures, DC Link Ripple

Display	Trip Message and Meaning	Possible Reason for Trip
		Motor loading too great
		FIXED BOOST level set too high
	DC LINK RIPPLE	Supply imbalance in a 3–phase system
	A dc link ripple alert	Poor supply regulation in a 1–phase system
	CURRENT LIMIT	See OVERCURRENT above
	Software overcurrent trip
	TERMINAL 3 OVERLOAD	AIN2 overload – overcurrent applied in Current
		mode
	TERMINAL 4 OVERLOAD	+10V REF overload warning – 10mA maximum
	TERMINAL 5 OVERLOAD	AOUT overload – 10mA maximum
	TERMINAL 9 OVERLOAD	DIN3 overload – 20mA maximum
	TERMINAL 10 OVERLOAD	DOUT2 overload – 20mA maximum
	Product Code Error	Switch unit off/on. If persistent, return unit to
		factory
	Calibration Data Error	Switch unit off/on. If persistent, return unit to
		factory
	Configuration Data Error

General Failures

Problem	Possible Cause	Remedy
Inverter will not power–up	Fuse blown	Check supply details, fit correct fuse.
		Check Product Code against Model
		No.
	Faulty cabling	Check all connections are
		correct/secure.
		Check cable continuity
Inverter fuse keeps blowing	Faulty cabling or	Check for problem and rectify before
	connections wrong	replacing with correct fuse
	Faulty Inverter	Contact Eurotherm Drives
Cannot obtain power–on	Incorrect or no supply	Check supply details
state	available
Motor will not run at	Motor jammed	Stop the Inverter and clear the jam
switch–on
Motor runs and stops	Motor becomes jammed	Stop the Inverter and clear the jam
	Open circuit speed reference	Check terminal
	potentiometer

5–2 Troubleshooting MN735