Eastey ET2008, User Manual

Page: 38 / 57

38 Troubleshooting
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.