Conair GB - Manual (Page 12)

DIAGNOSTICS - for the CHECK OUT PROCEDURE
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:
GBM, 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 U.S.).
Page 13