Alliance ACA - PRO400 Harness Installation

Alliance ACA Coin/Card Ready Machine Harness Installation

This harness WILL NOT work with MDC or NETREADY controls. You MUST use the Universal Harness

This document will walk you through the process of installing your Airwallet Pro400 harness to your Speed Queen machine. This guide is for the following machines:

Quantum ACA Washers
Quantum ACA Pro Dryers
Any Alliance machine with WHITE ACA 12-pin coin harness connection Card ready or coin ready

What is needed:

Airwallet Pro400 Unit
Speed Queen Pro400 Quantum Gold Pro Harness (WHITE connector)

NOTE: When using with a non-compatible machine, you may be required to modify the power connection to connect to your machine. This may require cutting wires and modification of the power connections.

PRO400

Harness Kit

Installation Video

Insert Video here

Recommended Dashboard Setup

Fixed ➜ Pulse operated
Pulse length: 80-100ms.
Pulse repetition: Program Specific
Busy signal: Low

Recommended Machine Setup

Airwallet pulses the Coin 2 connection on this harness and the machine must be programmed for $.25 on the dEn2 setting in the machine or the machine will be pulsed incorrectly or dryers may give 99 minutes for cycle times.

Pulse Configuration Requirements

ACA machines using a pulse configuration require dip switch 3 on the Machine Control Board to be set to the 'OFF' position. Leave all other dip switches as is.

Installing Airwallet Harness

1.        Power down the machine by unplugging or turning of the breaker.
2.      Open the front control Using the required key and pull open. !CAUTION! Take care not to pull on the wires connected to the panel as they may be damaged.
3.      Locate the 12-pin WHITE control harness plugged into the front control.

4. If the machine harness is present, unplug the machine harness and plug the Airwallet Pro harness into the machine.

5. Plug the machine harness into the Airwallet Pro harness.

6. If the feedback for a busy is going to be used, you will want to plug in the feedback plug on the control on the 7-pin serial connection. This connection may also be located on a separate board inside the machine. See Dashboard for setup instructions

Power Connection

Each alliance machine has a unique power connection. As such, it will be up to the installer to determine the best connection method for power.

ACA power connection (default)

1. Locate the 120v power connection inside the control pocket. Unplug and plug in the Airwallet power harness connection and plug the machine harness in to the Airwallet harness.

Modified power connection

1.        Locate the 120/208/240v power connection on the machine, generally located in the rear of the machine.
2.      Connect a 2-wire lead to the L and N wires from the rear power connection and run the power wires to the area where the Airwallet device is located.
3.      Cut the power connection off the Airwallet harness

4. Connect the wires from the Airwallet harness to the power connection run from the rear of the machine using power taps or Wago connectors.

Dashboard Setup

1. If the Dashboard programming has not been done prior, make sure to note the serial number or take pictures of the label on the bottom of the PRO400 unit.

2. Mount the Airwallet unit inside the machine using the mounting tape. It is recommended to mount the reader inside the front panel close to the control board or on the outside back of the machine to ensure a quality connection.
3. Once you have confirmed all connections are made, and the serial numbers are gathered you can reassemble the machine and proceed to the software setup.

Updated on: 15/10/2026

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