Sterlco SGBD Series Batch Gravimetric Blenders - Manual (Page 68)

Bulletin Number Chapter 6: Troubleshooting 68 of 101
Problem Corrective action
Normal after a software upgrade. Follow on-screen instructions.
Check the input power. Verify that 110 volts (or 220 volts) are
±10%. This voltage must remain constant with all the motors
starting and stopping. Insure that the blender is on a “clean” circuit
that does not have other equipment on it. If the power is known to
be intermittent and have problems, set up the unit to run in
“AutoStart” mode. See the factory setup sheet at the end of this
manual. In this mode, if a short power interruption occurs, the
blender will automatically restart.
Check the power supply. Make sure that it has +5 VDC output to
the CPU board. Adjust to +5 VDC, ±0.1 volt.
Check the display ribbon cable connection to the CPU board and
the display. See the electrical chapter for more information.
Check the contrast adjustment located on the display board.
Check keyboard ribbon cable connections.
PLC Module Loaded
Check the CPU board for “lockup”. To do so, reset the CPU board
by cycling the power off and on at the motor control panel.
Check batch weight setting in the recipe menu. See the setup
chapter for more information.
Check the load cells and weigh hopper mounting for binding, etc.
Check to see that a pellet has not lodged under a load cell.
Check the ingredient supply hoppers to verify proper ventilation. If
a vacuum receiver has a leaking flapper valve and the supply
hopper is not vented, the blender computer can learn inaccurately
and cause an overfill condition on the next few cycles.
Weigh hopper occasionally
overfills.
Check the load cell connections to the panel.
Check the mix timer setting. This problem is normally due to over
mixing. See the mix timer section in the setup chapter. Reduce the
time until the problem is corrected.
Check the mixer drive to ensure that the agitator is turning
properly.
Material tends to separate in the
mixing chamber.
Check the high level switch in the mixer to lower the level slightly.
Material sticks to the flapper of
the weigh hopper and is not
dumped.
Increase the Dump Cycles setting in Mixer and Dump Setup.
Too much material remains in
the mixer.
Increase the Mixer Dump Time in Mixer and Dump Setup.
The material is not being mixed
thoroughly.
Increase the Mixing Time in Mixer and Dump Setup. Actually if
you over mix material, you can have the same problem. If you
have the blender set for “Continuous Mixing” then change it to
“Timed Mixing” and adjust the Mixing Time appropriately.