Alliance Laundry Systems F232157R7 11

Electronic Control Unit

The “B” 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.

Summary of Control Outputs and Inputs

Outputs

General outputs provide signals to operate the following components.

1.Hot Fill Valve (HF)

2.Cold Fill Valve (CF)

3.Drain Valve (normally open) (DR)

4.Door Lock Solenoid Coil (DL)

5.Door Unlock Solenoid Coil (DU)

6.Supply 1 (detergent) (S1)

Introduction

7.Supply 2 (bleach) (S2)

8.Supply 3 (sour/softener) (S3)

9.Optional 3rd (Extra) Fill Inlet (governed by the configuration settings) (S4)

10.Optional Heat (HT)

11.*Prep for Card Reader or Central Pay (“machine available signal”)

For standard models, the components for outputs shown as “optional” will not be populated on the output printed circuit board.

AC outputs are solid state outputs that operate either 120 Volt AC or 220 Volt AC (nominal voltage) components, depending on the control voltage configuration. Outputs are fused appropriately.

Inputs

1.Low Water Level

2.Medium Water Level

3.High Water Level

4.Door

5.Coin 1 Signal

6.Coin 2 Signal

7.*Prep for Card Reader or Central Pay (“start pulse”)

*This allows machine to interface with the card reader or the central pay system. “Start Pulse” originates from the reader/ central pay system, and this satisfies the programmed vend. B control provides “Machine Available” signal to reader/ central pay when it is ready to accept payment. Refer to Machine Electrical Schematic.

Control Voltage

The control power supply can be configured to operate on 110 Volt AC nominal RMS input voltage

50/60 Hertz, OR 220 Volt AC nominal RMS input voltage 50/60 Hertz.

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.

F232157