Eastey ET1608-30, User Manual

Page: 35 / 55

Troubleshooting 35
Problem Solution
Conveyor not moving 1. The conveyor motor is controlled by a D.C.
control board. Input is 220 VAC in and variable
0 to 90 VDC out.
2. Is a green light on? If not, check the input fuse.
3. If fuse is good and a green light is not on,
check for 220 VAC on L1 and L2. If there is
voltage, check the output DC voltage.
4. Check output fuse.
5. The KBMM-225 has a current overload. Is
there a red light on the board? If so, below are
some conditions that could cause this light to
turn on.

This could be caused by a jammed conveyor.

Locate the ceramic horsepower resistor and
check its resistance. If the ohmmeter indicates
open (infinite resistance), the resistor is
damaged; replace it
— but, there is a reason
the resistor went out. There will be a point
number (for example, .1 or .25) you will need
this number when ordering a replacement
resistor.

The motor is pulling more amps than the board
is allowing. Try adjusting the CL potentiometer
on the motor controller board.

Bad idler or drive bearing.
6. If the red light is on, disconnect the drive motor
from the drive chain. Power up the machine
and operate the motor without any load and
see if the red light goes off. If the board works
and the red light does not light, it does not
mean that the motor is good; it could be weak
under load. Check the brushes. Also pull the
conveyor by hand, checking to make sure it
pulls smoothly and checking for bad bearings.
7. If the light remains on, replace the motor.
8. If the red light is not on and a green light is,
with the speed pot set at 100%, check for 90
VDC on terminals A+ and A
–. If voltage is not
correct, try adjusting the MAX potentiometer to
obtain 90 VDC.