Foley United ACCU-Pro 670 Assembly And Service Manual page 27

TROUBLESHOOTING (Continued)
--PROBLEM-- --POSSIBLE CAUSE--
Traverse speed A--Wiring hookup to potenti-
control goes at ometer is improper. (If compo-
one speed only. nents have been replaced.)
B--Defective speed control
potentiometer.
C--Main circuit board dial pot
settings not correct. (If board
has been replaced.)
--REMEDY--
Check potentiometer wiring for
proper hookup. See that
speed pot is wired per electri-
cal diagram.
Check Potentiometer on
control panel.
Check Petentiometer for
10,000 ohms.
Remove three wires from
Traverse Drive Control
red from term #8
white from term #7
black from term #9
Check all pot settings on
circuit board as shown in
wiring diagram. (See adjust-
ment section Traverse Motor
Control Board Settings.)
27
TRAVERSING
--REASON--
Wrong wire hookup effects
traverse control. Reversing red
and orange wires to
potentiometer the DC motor will
run at zero speed but maximum
will be too slow. Reversing red
and white wires does not affect
speed control.
Traverse Drive Control
Pin #8 to 7
Pot Full CCW Pot Full CW
0 VDC 9.75 VDC
Pin #8 to 9
Pot Full CCW Pot Full CW
9.75 VDC 0 VDC
If Yes, pot is O.K.
If No, go to step below
Check for 10,000 ohms
red to white wires
Full CCW--10,000 ohms
Full CW--0 ohms
Red to black wires
Full CCW--0 ohms
Full CW--10,000 ohms
If Yes, pot is O.K.
If No, replace potentiometer
Wiper inside of potentiometer
controls speed. Wiper may be
bad and not making contact.
Minimum and maximum pot
settings effect traverse speed.