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Control Troubleshooting Guide


15, 125, 250, 500 Series Controls ONLY

*Perform a visual inspection, looking for burn marks, burnt components and blown traces before testing

*Before beginning testing please be sure the fuses in the drive are good

The following should be checked with the drive disconnected from AC power and the motor.  Use the continuity (diode checking) function of your multi-meter.  A short (indicated by a solid beep, not a momentary beep) on any of the below indicates a drive that is in need of repair.

Check for Shorts

Pin Locations
Measuring Points 15DV Series 125D Series 250G Series 530B Series
AC N to AC L AC2 to AC1 P1-1 to P1-2 P1-10 to P1-11
-A to +A -ARM to +ARM P1-4 to P1-3 P1-4 to P1-5 P1-4 to P1-5
-A to AC N -ARM to AC2 P1-4 to P1-2 P1-4 to P1-10
-A to AC L -ARM to AC1 P1-4 to P1-1 P1-4 to P1-11
+A to AC N +ARM to AC2 P1-3 to P1-2 P1-5 to P1-10
+A to AC L +ARM to AC1 P1-3 to P1-1 P1-5 to P1-11
-A to POT HI -ARM to SPEEDPOT HI P1-4 to P1-6 P1-4 to P1-3 P1-5 to P2-5
Table 1 Continuity Check Points 

If none of the above measure as a short circuit, connect the speed pot, AC power and the motor to the drive per the instruction manual.  Set your multi-meter to the DC voltage mode and measure the following:

Check for Proper Voltage

Pin Locations Expected Measurement (Approximate)
Measuring Points 15DV Series 125D Series 250G Series 530B Series 120VAC Input 240VAC Input
-F to +F -FIELD to +FIELD P1-4 to P1-5 P1-6 to P1-7 P1-6 to P1-7 100VDC 200VDC
-A to POT HI -ARM to SPEEDPOT HI P1-4 to P1-6 P1-4 to P1-3 P1-5 to P2-5 12VDC 12VDC
-A to POT LO -ARM to SPEEDPOT LO P1-4 to P1-8 P1-4 to P1-1 P1-5 to P2-3 Varies w/ MIN pot
-A to POT WIPER -ARM to SPEED POT WIPER P1-4 to P1-5 P1-4 to P1-2 P1-5 to P2-4 Varies w/ SPEED POT
-A to +A -ARM to +ARM P1-4 to P1-3 P1-4 to P1-5 P1-4 to P1-5 45-60VDC (open motor);

0-90VDC (good motor)

90-140VDC (open motor);

0-180VDC (good motor)

Table 2 DC Voltage Measurement Points

If all of these tests pass please contact Dart Controls, Inc. technical support for further assistance.

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