18
Check Out Procedure Diagnostics
If display fails to come on at all:
Check for power at outlet
Check the 1/2 amp panel front fuse.
If first display says (FOUR):
Then this is NOT the correct manual for this software. Obtain and use a FOUR software manual.
Possible model numbers are:
MB, 140, 14R, 220, 240, 24R, 420, 440, 44R, 940, 184.
If model number is not correct for you unit: see the next page, SELECTING CORRECT MODEL.
If display shows randomly drifting numbers:
Check to see load cells are plugged in.
If display shows about (- 1250.0) or (-4500):
Check that the weigh bin is in place properly.
If display is steady but not near zero:
An over stressed load cell will display a permanently high or low reading. Recalibrate load cells; next section.
If there is no response from the display when the bin is touched:
Check for damaged wires to load cells.
Check that load cell plug screws are secure.
If response is not sensitive or does not return to its start point:
Check for interference around weigh bin.
If pressing * does not display (PASSWORD):
You are not in the normal power-up mode or the keypad doesn't work. Normal mode is indicated by the ABSENCE
of the letter M or P at the left of the display.
If display says INVALID after entering the password number:
You pressed the wrong keys or the password number has been changed and it is no longer 22222. Call us for help.
If an air solenoid does not operate:
Check the 1/2 amp fuse.
Check solenoid cable connected properly and fully seated.
Check mix chamber door closed, safety interlock engaged.
If a slide or dump valve does not open:
Check the air supply and regulator adjustment: (minimum 20 psi, 80 psi (5.5 bar) recommended).
Check for proper air line connection to cylinder.
If an auger feeder motor does not run:
Check the 3 amp fuse.
Check that the motor is plugged into the proper outlet.
Check for faulty motor by plugging it into a known source of 110 volt A.C. power (240 volt outside USA).