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Install GPay kit 4003-001-2 on Maytag or Whirlpool machines

Install the Greenwald Pay device through the serial port on the Maytag or Whirlpool machine control board.

  • Kit: 4003-001-2
  • Installation sheet: INS. 2475-4 Rev A

Installation layout

Maytag/Whirlpool Greenwald Pay installation connection layout

What you need

  • Greenwald Pay machine labels
  • Appropriate tool or operator key to open the machine panel
  • Smartphone with the Greenwald Pay app

Maytag/Whirlpool Greenwald Pay installation kit and required tools

Before you begin

  • Create the room and machine profiles in Greenwald Management System (GMS).

  • Confirm the exact machine model, controller, and kit number.

  • Disconnect machine power before opening the console or changing connections.

Install the hardware

  1. Open the console panel.

  2. Connect the Greenwald Pay serial connector to the machine control board.

Greenwald Pay serial connector on Maytag/Whirlpool control board

Configure the device

  1. Leave the console open and restore machine power.
  2. Wait for initialization. A slow-blinking white LED means the device is not configured and is ready to pair.
  3. In the Greenwald Pay app, sign in with administrator credentials and select Setup.
  4. Select the correct account and location.
  5. Select the device, then select the machine assignment that matches the physical machine label.
  6. Confirm that the MAC address shown in the app matches the MAC address on the device.
  7. Label the washer or dryer with its machine number.
  8. Repeat for every machine.
  9. Close all console panels when setup is complete.

For additional help, call Greenwald Customer Service at 800-221-0982.

Device LED codes

Color Activity Meaning
Off Off Device not connected to power
White Slow blink Device not configured
Blue Steady Selected during configuration
Yellow Slow blink Loading machine configuration
Green Steady Configured and ready
Blue Slow blink Active with phone app
Green Fast blink Active; Start not pressed
Green Slow blink Busy; machine running
Red Slow blink Machine error
Red Fast blink Machine interface error
Blue/Green Slow toggle Firmware loading
Red Steady Firmware error

Machine error codes

  • d5 or d13 - Blocked coin slots: Check the slots for coins or debris.
  • d9 - Voltage below 90 VAC for 8 seconds: Power the machine down, power it up, and try again.
  • d16 - Communications not received: Check all connections.
  • F#, E#, or F## - System error: Press Start/Pause once to clear the code, then press Start/Pause again to restart the washer.

Original installation sheet

Download INS. 2475-4 Rev A. The same PDF remains attached to this page.

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