84
F238006
Section 5 Service Procedures
To reduce the risk of electrical shock, fire, explosion, serious injury or death:
• Disconnect electrical power to the washer-extractor before servicing it.
• Close the gas shut-off valve to the washer-extractor (when applicable) before servicing it.
• Never start the washer-extractor with any guards/panels removed.
• Whenever ground wires are removed during servicing, these ground wires must be
reconnected to ensure that the washer-extractor is properly grounded.
W461R1
WARNING
© Copyright, Alliance Laundry Systems LLC – DO NOT COPY or TRANSMIT
34. WATER LEVEL PRESSURE SWITCH
The pressure switch is set for predetermined water
levels at the factory and adjustment is not
recommended. The switches furnish inputs to the
microcomputer that engage the water inlet valves
until the programmed level (low, medium or high)
is reached.
The pressure switch is connected to a rubber air
trap that is attached to the shell sump. This air trap
acts as an air reservoir so that water does not rise
into the tube that connects the switch to the air
trap. A pressure differential is created in the air
trap as the machine fills with water. This results in
a deflection of the pressure switch diaphragm.
The pressure switch has pre-set trip points and
reset points. The low level reset point acts as a
safety for spin. The spin contactor cannot energize
until the low level reset point is reached. This
prevents the machine from going into spin
(extract) with water in the machine.
Service Tips
a. If the pressure switch does not turn off a water
fill (low, medium and high), check the air trap
and tubing for blockages or leaks. The system
must be air tight. Detergent residue may cause
blockages.
b. If the machine does not fill, check for
continuity at the pressure switch.
c. Connector J11-1 plugs onto the water level
switch and the wires connect to the AC drive
interface board. Refer to the wiring schematic
supplied with machine for details.
Figure 19
Level Switch
Figure 20
Water Level Pressure Switch Terminals
2nd LEVEL
3rd LEVEL
1st LEVEL
P134D
3rd LEVEL
1st LEVEL
31
34
32
36
21
24
22
26
11
12
14
16
2nd LEVEL
P130D
