53
RVV Gen II KO Service and Parts Manual
SECTION 5: Troubleshooting
B.
Y
The Y-home switch is located below the elevator arm. This switch is covered by a black plastic cover. To test this
switch, begin with the elevator arm all the way down. The display should show “
Y 1
.” Lift the elevator arm up,
and the display should change to “
Y 0
.”
1. If the display does not change, place the elevator arm all the way down on the Y-home switch and ensure it is
parallel with the bottom of the main door.
(Refer to Figure 5.11.)
2. Ensure that the black plastic cover over the switch is not holding the switch down. If it is, bend the plastic
upward so that it completely disengages the switch.
3. Check the wiring to the Y-home switch.
4. Check for 5 VDC on the black and red wires (pins 6 and 7) at position P1 on the DMC board.
5. If all the above is good, replace the Y-home switch. If this does not fix the issue, replace the DMC board.
FIGURE 5.9.
Front of product cup
The Hall Effect sensor is located on the front of the cup. Three wires run into the sensor (red, green, and black). Place a
magnetic device directly in front of the sensor to test it in
Sensor Test
.
Hall Effect sensor
FIGURE 5.10.
Location of position P4
Make sure the harness at the connection on the logic board is tight, with no wires loose, backed out, etc.
Position P4 on cup logic board
