WeighTech MicroWeigh - Machine Troubleshooting and Support Information; Machine Operation Problem Diagnosis; Preparing for WeighTech Support Contact; Module Assignments and Operational States

to temporarily disconnect the load cell and substitute a known good load cell simulator
(available for purchase from WeighTech), or a known good load cell. Calibrate the scale
with a convenient test weight and check to see if the weight reading is stable. If so,
the noisy load cell has probably been damaged or water-soaked. If the indicator still
displays a noisy weight with a load cell simulator, the problem may be in the indicator.
Contact WeighTech for further assistance.
12.2 Machines
Most machine related problems can be traced to bad air supply (excessive water and
condensation), sticky air cylinders, worn or clogged solenoid air valves, and wiring.
A quick test is to put the machine in “Cycle off” mode–all the valves should energize,
shutting all the gates. Then put the machine in “Cycle idle” mode, which will de-
energize all the valves and open all the gates. If a gate doesn’t move during these two
tests, start swapping parts around to determine where the problem lies.
12.3 Before calling WeighTech...
Write down a few key pieces of information. Gather the indicator serial number from
the front panel, the software application name and build number from the “Info menu”,
and grab the current settings if you have access to a Palm. If anything on the indicator
has changed, been replaced, or been modified, mention that to the service technician too.
If the problem involves fill rates, hangs, or questions regarding machine capabilities,
be ready to describe the product, product flow rate, and any bag/box/tote/combo sizes.
If you’re calling about unstable weight readings, over/underload, or other load cell
related problems, have the ADC, excite, and signal readings from the “Info menu”
handy. When calling, be prepared to describe what is wrong (“it doesn’t work!” isn’t a
good description–“hopper gate doesn’t shut in off mode” is much better) and what you
expected to see.
12.4 Module Assignments
Slot Module Type Function Module on (lit) Module off (dark)
M1 OAC5 (black) Infeed line stop Infeed stop Infeed run
M2 OAC5 (black) Buffer hopper Hopper shut Hopper open
M3 OAC5 (black) Weigh hopper Hopper shut Hopper open
M4 OAC5 (black) Bag opener Extended Retracted
M5 IDC5 (white) Dump switch Pressed
M6 IDC5 (white) Idle switch
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