AEC OS Series Gravimetric Batch Blenders - Manual (Page 93)

Page 92 of 118
7 Troubleshooting
7-1 Description and Objectives
This section provides basic troubleshooting procedures to common OS/OA
blending system problems. Any problem encountered that is not listed should be
discussed with an AEC/HydReclaim service technician.
Problem Possible solution
Check the display contrast adjustment. This is located on the
blender CPU board.
Check the CPU display cable. This connects the 2-line display to
the CPU.
Check the power lamp indicator. Make sure that the blender has
control power. Make sure to check the internal power indicator
lamp as well.
Check the CPU +5 VDC power supply. Make sure to check this not
only at PS-1 but also at the terminal strip connections as well.
Check for loose connections. The control display is
blank.
Check out the air safety system. If any one of the safety switches
is not held in, the power to the blender control will be
disconnected. Check the pressure switch.
Slide gate will not open,
auger will not turn. Check the recipe to ensure that the metering device in question is
included in the recipe.
Check to make sure that the metering device is not jammed.
Check the SSR fuse in the control panel for the proper device. This
is a small plug-in fuse located on the module.
Check the air valve for proper operation by sticking a screwdriver
into the back hole of the valve’s solenoid cover to manually
operate the valve. If the cylinder operates on the metering unit
when the coil is depressed, the problem is a loose connection or a
burned-out solenoid coil.
If the cylinder does not actuate when the solenoid coil is manually
depressed, the solenoid valve is stuck or plugged up with dirt.
Clean or replace.