e. Wash Tank Fill Solenoid Problem. If you checked for proper voltage per
the procedures in Lesson 1, paragraphs 1-4a(7)(a) through (f), and found that the valve
does not operate, the coil may need to be replaced, or the valve may be stuck. You
need to remove and inspect the solenoid valve. You do this by using the following
procedures. Refer to Lesson 1, figure 1-11.
Turn off the power. Turn off and disconnect the external water supply.
(2) Disconnect the wiring, including the green ground wire. Note from which
terminals you removed the wires.
Unscrew the flow restrictor from the front.
(4) There are two screws holding the valve, located on both sides of the
water inlet. Remove them and bring the solenoid out of the left side of the machine.
Remove the red plastic cap. Pull the valve down and out of the coil.
Remove the valve operator by turning the hex fitting counterclockwise.
Check the action of the spring.
(a) Remove any foreign matter from inside the valve.
(b) Check the valve seat for possible corrosion or damage.
If you find damage, replace the valve.
f. Replenishment Problem. Procedures for correcting replenishment problems
are covered in Lesson 1, paragraphs 1-4c(7)(b) through (e).
g. Drive Motor Problem. The drive motor does not have enough torque to turn
the drive shaft even though no racks are stuck and power is being supplied at terminal
strip TS6. Therefore, you have determined that the drive motor must be replaced. Use
the following procedures. Refer to figure 4-8.
Disconnect the power supply to the processor before removing the front
panel, as severe electrical shock will result from coming into contact with
"live" electrical components.