
Introduction
9
F232197 © Copyright, Alliance Laundry Systems LLC – DO NOT COPY or TRANSMIT
Electronic Control Unit
The “A” electronic control is composed of the
electronic control unit and the control fuse board with
wiring harness. Only an authorized person should look
inside the control compartment. First TURN OFF
POWER, open lid and remove any cover present.
Make sure door lock circuit has fully discharged. The
door unlock capacitor can retain high electrical charge,
even when the machine’s electrical inputs are
disconnected, until it has discharged. Some machines
are equipped with an orange or red indicator light
facing upward in the control compartment. If this is
on, wait until light goes off (indicating when high
voltage in the door lock circuit has discharged). The
components are described below.
This portion of the control contains the “intelligence” –
the micro-controller and the miscellaneous components
on the printed circuit (PC) board. The board has a
metal cover, which MUST be in place at all times
during machine operation. Operation of the machine
without this cover installed will void the warranty.
The control unit monitors and responds to input, gives
information about the status of the washer and
monitors and responds to inputs from the user
interface (keypad). The control provides signals to the
control output unit, which in turn operates the
components that control the machine functions. This is
located behind the machine control panel.
Control Output Fuse Board
This portion of the control contains the power supply
for the control unit, and also the switching devices
which power the components in the machine, all of
which are on the output PC board. The switching
devices are controlled by the control unit, and are solid
state.
Harnessing
Wiring harnesses are modular – harnesses common to
various configurations are similar, while those specific
to a certain configuration can be added. There are
harnesses for inputs to the control unit, for outputs
from the control power/output unit to the machine
components, and for the main incoming power to the
control power/output unit.
Communications
Central Pay System
(Central Pay System Models Only)
The models are usually designated by the “Prep for
Central Pay” option. The model number will have an
“L” in the 6th digit (i.e. *C40AL2OU6001). Refer to
Nameplate Location. The control will accept a start
pulse from the central pay system and will give a
“machine available” signal.
* Denotes Brand
For detailed information on the Central Pay System
Communications, refer to the manufacturer.
IMPORTANT: For central pay systems that
provide a start pulse and that accept a “machine
available” signal, the A-Series Microcomputer
MUST be set up (prompted) for one vend price (“1
Pr”) and “CArd” in SETUP Mode. The vend
setting must be set equal to the card vend.
Third Party Card Reader
(Card Reader Models Only)
The models are usually designated by the “Prep for
Card Reader” option. The model number will have a
“Y” in the 6th digit (i.e. *C40AY2OU6001). Refer to
Nameplate Location. The control will accept
communications with a Card Reader in order to
perform vending transactions when a card is inserted
to pay for cycles.
* Denotes Brand
For detailed information on the Card Reader
Communications, refer to the manufacturer.
IMPORTANT: For card systems that provide a
start pulse and that accept a “machine busy”
signal, the A-Series Microcomputer MUST be set
up (prompted) for one vend price (“1 Pr”) and
“CArd” in SETUP Mode. The vend setting must be
set equal to the card vend.
Download Device
A download device, available at an extra cost, is a
portable device that allows the user to pre-program
customized cycle formulas, vends, special promotional
pricing, etc., for all A-Series Microcomputer washer-
extractors in a facility. The information is pre-
programmed into the device, the device is connected to
the washer-extractors needing updates, and the pre-
programmed information is downloaded into the
A-Series Microcomputer on the washer-extractor.