USC AT500H DUAL PUMP STAND User manual

Page 1
TROUBLESHOOTING - AT500H MANUAL TREATER
Below is a table describing the most frequent problems and solutions with the USC
AT500H Treater . For further assistance, contact the USC Service department at
[phone].
Problem Possible Cause Solution
Pump will not turn off in AUTO
when seed runs out.
1. Proximity switch is dirty.
2. Proximity switch is set too
sensitive.
1. Clean proximity switch
2. Adjust the pump proximity
switch sensitivity by turning
adjustment screw counter-
clockwise (page 2).
Pump will not turn on in AUTO 1. Proximity switch is not
staying covered.
2. Proximity switch is not
sensitive enough.
1. Make sure proximity switch is
staying covered with seed.
2. Adjust pump proximity switch
sensitivity by turning the
adjustment screw clockwise
(page 2).
Auger overload keeps tripping 1. Seed flow is too high.
2. Too much liquid being
applied.
1. Slow down seed flow.
2. Lower the liquid rate.

Page 2
PROXIMITY SWITCH ADJUSTMENT GUIDE
The proximity switch is mounted in the inlet to the adjustable chamber and will detect
when seed is present.
The proximity switch no longer detects seed it will automatically shut off the pump
when all seed has left the hopper.
If the proximity switch is not working properly, this can be caused by wear, dust,
or even moisture. The first step is to clean the lens of the proximity switch.
If this does not solve the problem, the next step would be to adjust the sensitivity of the
proximity switch.
The green light indicates the power status. If it is active the device is powered.
The amber light indicates when seed is being detected. If it is active it detects seed,
if inactive it does not detect seed.
Using the small screwdriver provided inside the control panel, you can adjust the
proximity switch by turning the adjusting screw on the back of the proximity switch.
 Turn Clockwise to make the proximity switch more sensitive.
 Turn Counterclockwise to make the proximity switch less sensitive.
Proximity Switch Screwdriver
Amber light
Green light
Sensitivity
Adjustment Screw