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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
NOTE: In the event of an incorrect ribbon cable
connection (i.e., the plug is put on in reverse), the
display would be blank. Use care to ensure that the
ribbon cable is connected properly.
g. Remove the AC drive board from the nylon
standoffs that fasten the board to the module.
Refer to Figure 9, and remove the board.
h. Installation is the reverse of removal.
NOTE: The 16-conductor ribbon cable plug is not
polarized so it is possible to insert it backwards. Use
the procedure detailed in Step 6 to ensure a correct
connection.
NOTE: Never force a plug into a jack. This can
result in irreparable damage to the electronic
circuitry.
29. KEYMODE SWITCH
Symptoms of a damaged keymode switch may
include the following. If the following symptoms
occur, replace the keymode switch (refer to the
machine’s parts manual for keymode switch part
numbers).
a. The computer display doesn’t change from
“NEXT” to CYC.”
b. The computer allows programming steps to be
entered, but the program isn’t saved when the
keymode switch is turned back to “RUN.”
30. CALIBRATING THE WE-6
TEMPERATURE CIRCUIT
a. Turn off power to the machine.
b. Remove the two screws at the top rear edge of
the module top cover and slide the cover back
slightly until it can be removed. Remove the
module top cover.
c. Remove the nut that attaches the computer
board cover and remove the cover.
d. Looking at the lower left of the computer board
from the rear of the washer-extractor, find the
1/2 inch x 1/2 inch (13 mm x 13 mm) square
blue component with a white plastic screw head
in its center. This is the temperature calibration
potentiometer. Turning the screw head adjusts
the temperature reading. Refer to Figure 11.
e. To allow time for calibration, program the
following sequence (refer to the machine’s
programming manual):
(1) Wash 3 for 10 seconds.
(2) Cold fill to high level.
(3) Wash 3 for 9 minutes, 99 seconds.
f. Place a thermocouple of the appropriate range
inside of the basket well below the high water
level.* (See boxed note below if a
thermocouple is not available.) Close the door.
Figure 10
Interface Board
PHM1973S
Headers
Headers
J6
J1
J8
Standoff