Which Airwallet unit do you have?
Our installation guides show the wiring for two kinds of Airwallet PRO unit, and many machines can also be installed with a plug-in harness. Check which one you have before you start.
Check your unit
Read the model number on the label on the back of the unit, or count the wires in its cable.
Unit | Cable | In the installation guides |
|---|---|---|
PRO310–PRO330 | 7 wires | Use the PRO310–330 column |
PRO340 | 8 wires | Use the PRO340 column |
PRO400 with Universal Harness | 8 wires | Use the PRO340 column |
PRO400 with a machine harness | Harness plug | Use the PRO400 harness guide for your machine |
Wires 1–7 do the same job on the PRO310–330 and the PRO340. Wire 8 on the PRO340 is a 24V output, and most installations do not use it.
If the guide tells you to move a wire inside the unit
Some machines report that they are busy with a 24V signal (DC busy). On a PRO310–330 you move wire no. 5 from port 10 to port 7 inside the Airwallet unit. On a PRO340 you do not move anything: use wire no. 8 instead.
ASKO machines also need wire no. 7 moved from the NC terminal to the GND terminal inside the unit. This applies to every Airwallet unit.
Harness installations
- PRO400 units connect with a machine-specific harness. Find yours in the Airwallet PRO400 Harness Model Identification Guide.
- A PRO400 with the Universal Harness does the same job as a PRO340, and the two can replace each other. Wire it like a PRO340.
Unit guides
- Airwallet PRO310 to PRO330 - Installation guide
- Airwallet PRO340 - Installation guide
- Airwallet PRO400 - installation guide
Updated on: 12/11/2026
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