DE-STA-CO VARI-PAK DC CONTROL - Manual (Page 21)

XII – TROUBLESHOOTING GUIDE
MOTOR WILL NOT RUN:
1. Check control operation by placing RUN - JOG/STOP in RUN position.
2. Make sure disconnect fuses or circuit breaker in AC line are okay.
3. Check fuse on PC board, and if open, replace.
4. Check logic. See Start-up Procedures and Application Section.
5. Be sure speed pot is not set at zero.
6. Unit is in current limit – See if “OL” indicator is lighted. Check position of jumper J1. (See
table 4, p. 8) and CL trimpot setting.
7. With power removed from unit and motor leads disconnected, check for worn or improp-
erly seated brushes.
8. Check for locked motor shaft.
9. Contact Industrial Motion Control.
FUSE BLOWING:
1. Improper wiring – check AC line and motor wiring. Be sure ground wire is connected only
to the Green ground screw.
2. Improper AC line voltage. Be sure 120 Volts AC is connected to 120 Volt AC rated con-
trols and 240 Volts AC is connected to 240 Volt AC rated controls.
3. Motor brushes worn or improperly seated.
4. Motor load is too heavy. Check for machine “jam-up” or excessive load. (“OL” LED is
continuously lighted.)
5. Contact Industrial Motion Control.
BRAKING NON-FUNCTIONAL (control may not stop):
1. Improper logic wiring.
2. Motor brushes worn or improperly seated.
3. Contact Industrial Motion Control.
NO SPEED CONTROL:
1. Speed pot miswired or wiring defective.
2. Control not set up properly (see Application Section).
3. Contact Industrial Motion Control.
MOTOR WILL NOT RUN AT 1725 RPM:
1. Improper setting of Max SPD trimpot – rotate pot clockwise to increase speed.
2. Unit is in current limit (“OL” LED is lighted). (See section X, C, on page 17.)
3. Low line voltage. Check AC line voltage: 115VAC ±10% or 230VAC ±10%.
4. Verify motor nameplate voltage complies with control output voltage rating.
5. Contact Industrial Motion Control.
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