Baldor MN850, Baldor manual 230/460VAC 3 Phase

		Table 5-2 Troubleshooting Guide Continued
INDICATION		CORRECTIVE ACTION
Initial motor kick	Verify that AC input power and motor power wires are not reversed.
then bad start	(The motor will give an initial kick then start very roughly.)
Current is not	1.	Verify the current transformer connections at J3 control terminal.
displayed	2.	Verify that the soft–start control is correctly sized.
Motor does not	1.	Verify the Current Limit parameter value and increase if necessary.
accelerate	2.	Verify the Ramp Time parameter value and decrease if necessary.
	3.	Excessive motor current, decrease load.
	4.	Insufficient break away torque. Change pedestal voltage value to allow greater break away torque.
Fuse(s) blown	1.	Excessive start time.
	2.	Fuse undersized. Use only specified fuses for UL short circuit current ratings (see Section 2).
Cannot change	Remote start input. Factory preset start input is Programmable Input 1 terminals S1 and S0. If a start voltage has
starting from	been applied to S1 and S0, you cannot change to Keypad until the start command is removed. Therefore,
“Remote” to	remove the start voltage from S1 and S0 and then change to keypad.
“Keypad”

Figure 5-1

	230/460VAC 3 Phase			5MC–PCB
L1	L2	L3
		5
		Red	1
		Yellow
			2
		Yellow		RUN
		Red 3
			4
	3	6
		Red	5
		Yellow		TOR
			6
		Yellow	7
		Red
			8

14

Red 9

Yellow 10

Yellow

Red 1112

2

T1 T2T3

3Phase Motor

MN850 Troubleshooting 5-3