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TROUBLE ANALYSIS PROCEDURE
WARNING: Turn off power at disconnect and lock it off before entering the bin to work on or
near the Scattergrain. Stay clear of rotating blade when power is on!
TROUBLE
CHECKOUT PROCEDURE & INFORMATION
Motor does not run;
indicator light out.
Motor does not run;
indicator light ON.
1. POWER SWITCH IN OFF POSITION - Move switch to ON position.
2. INCORRECT OR NO POWER SUPPLIED - Check for 230 VAC between terminals 1
and 2 on terminal strip in Vari-speed control box; if correct or no voltage, check discon-
nect. Also check for loose wiring connections.
3. POWER SWITCH INOPERATIVE - With switch in ON position check for 230 VAC
between bottom two terminals on double fuse holder.
4. BLOWN FUSE - With switch in ON position check for 230 VAC between top two ter-
minals on double fuse holder; if incorrect or no voltage, remove the fuses and check
with a continuity tester. If one or both fuses are blown, replace with fuses of same
rating.
5. LOOSE OR BROKEN WIRE - With switch in ON position check for 230 VAC
between two terminals marked AC (or Ll and L2) on SCR control. DO NOT let test
probes come in contact with anything except the terminals on the ends of the wires.
1. SPEED CONTROL SET AT ZERO - Turn knob CW to start motor.
2. OVERLOAD CONDITION - Turn OFF power at disconnect and lock it OFF; check for
freedom of rotation of thrower blade.
3. FAULTY SCR CONTROL; LOOSE OR BROKEN WIRE - With speed control knob at
(100) dial setting check DC voltage between field terminals marked +F and -F on SCR
control and between terminals 3 and 5 on terminal strip in control box; voltage should
be 200 VDC; check DC voltage between armature terminals marked +A and -A on
SCR control and between terminals 4 and 6 on terminal strip in control box; voltage
should be 180 VDC.
4. BLOWN FUSE - In the previous check, if there is 180 VDC between armature termi-
nals marked +A and -A on SCR control, but not the same voltage between terminals 4
and 6 on terminal strip, remove the single fuse and check it with a continuity tester; if
fuse is blown, replace it with one of the same rating.
5. FAULTY SPEED CONTROL (POTENTIOMETER) - Move speed control knob to (0)
dial setting. Connect DC voltmeter between armature terminals marked +A and -A on
SCR control. Turn speed control knob CW; needle on voltmeter should increase and be
at 180 VDC when speed control knob reaches (100) dial setting. If voltmeter does not
increase at a rate in relation to the turning of the speed control knob, the potentiometer
may be faulty and the SCR control will need to be replaced. In some cases, just the
potentiometer can be replaced if it is separate from rest of SCR control.
6. LOOSE WIRING CONNECTIONS - Check that all wire connections are secure in
Vari-speed control box and motor connection box on outside of Scattergrain cone.
7. WORN BRUSHES IN MOTOR - Have them replaced by a qualified serviceman or
motor repair shop.
8. DEFECTIVE MOTOR - Remove motor and have it checked by a qualified service-
man or motor repair shop.
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