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# Maytag/Whirlpool Stack Machine Coin Only PRO330/Universal Harness Installation

## Maytag/Whirlpool PRO300/Universal Harness

In order to correctly install on these machines, the machine must have a coin drop installed or you need to provide the 4-pin Molex connection for the coin. This install guide assumes a coin drop is installed. This guide is not for debit only machines.

This document will walk you through the process of installing your Airwallet Pro330 to your MAYTAG machines. This guide is for the following machines:

• MDG

• MHN

• MAT

### What is needed:

• Airwallet Pro330 Unit

• (4) 3M 951K Crimp or BLUE Scotch Lock Connectors

• (4) BLUE MALE SPADE crimp connectors

• T20 Security Torx Bit

### Airwallet Pro330![](https://storage.crisp.chat/users/helpdesk/website/-/8/f/b/d/8fbd610f32d91000/image_14wwaxb.png)
### Correct PIN connection to the AA4 or AA5 coin drop plug on control board![](https://storage.crisp.chat/users/helpdesk/website/-/8/f/b/d/8fbd610f32d91000/image_1jiq2s1.png =340xauto)
## Installation Video

Coming Soon!

## Recommended Dashboard Setup

Fixed ➜ Pulse operated pulse length: 32 - 60ms, pulse repetition: variable

## Recommended Machine Setup

This guide is for reference only and may change. You will need to refer to the Maytag programming guide for pricing setup.

###### Maytag MFR/MFS/MXR/MXS Washers![](https://storage.crisp.chat/users/helpdesk/website/-/8/f/b/d/8fbd610f32d91000/image_1c86cc5.png)![](https://storage.crisp.chat/users/helpdesk/website/-/8/f/b/d/8fbd610f32d91000/screenshot-2026-10-14-133228_af4dav.png =795xauto)
Single Price

| Setting Value of Coin 1 Regular Cycle Price | Value0.25Variable |
| ---- | ---- |
| Price Display Coin/Debit Clear Escrow | HiddenCoin.CardYes |
| Special Pricing... | Off |
| Enhanced Pricing... | None |
Super Cycle

Use above settings plus the following:

| Setting | Value |
| ---- | ---- |
| Enhanced Pricing | Upgrade |
| Super Cycle Display | Yes |
| Super Cycle Price | 0.25 |
| Deluxe Cycle Display | No |
| Ultimate Cycle Display | No |
###### Maytag MHN/MAH/MAT Washers

| Code | Code Description | Value |
| ---- | ---- | ---- |
| 6 b | Regular Cycle Price Value of Coin 1 | Variable05 (5 nickels - $0.25) |

F Enhanced Pricing Option

00 (Off)

J Coin Option \_C (Coin)

L Price Suppression Option

PS (On)

n Clear Escrow Option CE (On)

Super Cycle

Use above settings plus the following:

Code Code Description Value

F Enhanced Pricing Option

Su (Super Cycle enabled)

H Super Cycle Upgrade Price

01 (1 coin)

###### Maytag MVW Top-Load Washers![](https://storage.crisp.chat/users/helpdesk/website/-/8/f/b/d/8fbd610f32d91000/image_1884tni.png)
| **Code** | **Code Description** | **Value** |
| ---- | ---- | ---- |
| 6 NORMAL | Normal Vend Price | Variable |
| 6 DELICATES | Delicate Vend Price | Variable |
| 6 POWERWASH | Powerwash Vend Price | Variable |
| 2 | Special Pricing Option | 00 (Off) |
| b | Value of Coin 1 | 05 (5 nickels - $0.25) |
| J | Coin/Debit Option | _C (COIN) |
| L | Price Suppression Option | PS (On) |
| n | Clear Escrow Option | CE (On) |
*D05 error code when pulsing wrong to reset push and hold delicate until you see p01 then hit start to reset machine.*

## Installing Airwallet Unit

||| WARNING! Disconnect power or turn off breaker prior to performing this installation.

1\. Power down the machine by unplugging or turning off the breaker.

2\. Remove the 4 panel screws and open the panel.![](https://storage.crisp.chat/users/helpdesk/website/-/8/f/b/d/8fbd610f32d91000/image_1vzkhgj.png)
![](https://storage.crisp.chat/users/helpdesk/website/-/8/f/b/d/8fbd610f32d91000/image_1txxbfz.png)
3\. Remove Soap Dish by pressing the lock tab inside the left side of the dish

||| !CAUTION! Take care not to pull on the wires connected to the panel as they may be damaged.

4\. Locate the 4-pin coin connection AA4 or AA5. The coin drop harness for the main coin drop is the correct one to tap into.![](https://storage.crisp.chat/users/helpdesk/website/-/8/f/b/d/8fbd610f32d91000/image_1hotl3e.png =744xauto)
### NO COIN DROP
 
|| NOTE: If no coin drop is used, you may have to cut the WHITE/BLUE STRIPE and BLUE wires in order for the machine to recognize the pulses.

5\. Locate the RED and WHITE wires going into this plug.![](https://storage.crisp.chat/users/helpdesk/website/-/8/f/b/d/8fbd610f32d91000/image_1aqjflg.png)

6\. To avoid cutting wires, you may want to use a 3M 951K crimp connector or a Scotch lock wire crimp, Apply the crimp to the RED and WHITE wires and connect wires 3 and 7 from the Airwallet unit.![](https://storage.crisp.chat/users/helpdesk/website/-/8/f/b/d/8fbd610f32d91000/image_93vcwb.png)
![](https://storage.crisp.chat/users/helpdesk/website/-/8/f/b/d/8fbd610f32d91000/image_1i7qec6.png)
![](https://storage.crisp.chat/users/helpdesk/website/-/8/f/b/d/8fbd610f32d91000/image_3pt2o0.png)
### KEEPING COIN DROP

7\. Locate the WHITE wire on the coin drop harness and cut it leaving enough slack on both ends.

8\. Connect WIRE 3 from the Airwallet unit to one side of the cut wire.

9\. Connect WIRE 7 from the Airwallet unit to the other cut wire bridging the connection through the Airwallet device.

| SEE DIAGRAM BELOW
![](https://storage.crisp.chat/users/helpdesk/website/-/8/f/b/d/8fbd610f32d91000/image_sgfxdd.png)

## POWER CONNECTION

10\. Locate the AC power block inside of the machine.

11\. Remove the 4 retaining screws inside the front of the machine.

12\. Pull the machine away from the wall at least 2 feet.

13\. Pull the metal tab on the bottom of the dryer to the right of the soap dish and lift dryer up. It is on a hinge and should open up and lean against the wall. The farther away you pull the machine from the wall, the easier the next steps will be.

14\. Locate the power connection in the right rear of the lower washer

15\. The incoming power wires will be BLACK or BROWN (L) and WHITE or BLUE (N) wires. power input depending on the country you are located in.
![](https://storage.crisp.chat/users/helpdesk/website/-/8/f/b/d/8fbd610f32d91000/image_1nco057.png)

16\. Install the RED 3M 951K wire crimps to the power wires and then plug the two power wires into the crimp connectors. NOTE! You may need to create extension wires to reach the power connection.![](https://storage.crisp.chat/users/helpdesk/website/-/8/f/b/d/8fbd610f32d91000/image_1v5qtc4.png)
17\. Connect WIRE 1 from the Airwallet Unit to the BLACK or LIVE wire. Connect WIRE 2 from the Airwallet unit to the WHITE or BLUE wire.![](https://storage.crisp.chat/users/helpdesk/website/-/8/f/b/d/8fbd610f32d91000/image_1e4wowu.png)
18\. Mount the Airwallet unit on top of the coin vault or inside the front panel.

19\. 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 PRO300 unit.![](https://storage.crisp.chat/users/helpdesk/website/-/8/f/b/d/8fbd610f32d91000/screenshot-2026-10-14-133943_s0tweu.png)
20\. 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.