Nayax Common Issues & Solutions

Here you’ll find the most important Nayax messages (M00–M05) and typical problems like “DEX failed”, “Out of Order”, sync freezes in the MoMa app, and much more – each with concrete steps to take.

Quick help (if you’re in a hurry)

• Make sure your device is registered! Send an email to deaccounts@nayax.com

• Restart the device/machine again (fully disconnect from power for at least 30–60 sec).

• Check the SIM card (inserted correctly, clean, working), optimize signal/antenna.

• If “DEX failed”: Check/reconnect cable, if needed swap DEX cable or yellow Nayax cable.

• In the MoMa App: “More” → reload data.

• If you’re still not sure: Contact Nayax Support.

Table: Error Codes M00–M05 (Overview)

M00–M04: recommended steps

M00 – Device Modem no communication

1. Power off the machine (60 sec.) → restart.

2. Firmly plug in the connections to the Modem/VPOS.

3. If it happens repeatedly: have support check the firmware/profile.

M01 – Modem initializing/booting

• Wait 1–2 minutes.

• If the state hangs: Restart the modem/machine ; if needed, check the SIM/signal.

M02 – SIM network not reachable

1. Antenna place higher/outside the housing; exclude cable break.

2. SIM insert correctly; if needed clean/replace.

3. Check provider reception at the location (test another SIM if needed).

M03 – No Internet & SMS Connection

1. APN data of the provider, check (exact spelling, user/password if required).

2. Adjust network mode/profile (2G/3G/LTE) for the location.

3. Restart; if error persists → contact support.

M04 – Only Internet Connection Missing

1. APN/data profiles and roaming settings, check.

2. If SMS works, internet not: often APN wrong or data blocked → contact provider/Nayax.

<a id="m05-detailliert"></a>M05 – No server connection (detailed)

Meaning: The terminal can't reach the server (usually SIM/signal/contact problem).

Steps:

1. Open the machine open and main switch off.

2. Expose the back of the Nayax device, carefully remove the SIM card.

3. Clean the contacts dry, insert them back correctly.

4. Turn on the machine turn on, close it and test the connection.

5. If the error continues: reposition/check antenna; check APN/provider.

Mobile network connection problems (M1/M2/M3 notes)

Typical causes

• Antenna unfavorable, loose or damaged.

• SIM inserted incorrectly, dirty, defective.

• Terminal has frozen.

Solutions

• Reposition antenna (higher/outside), plug in the connector only plug in, do not screw in.

• Check antenna cable for cracks/breaks, replace if necessary.

• SIM insert/replace correctly; disconnect device from power for 60 sec → restart.

“DEX failed” – DEX data cannot be read

Beforehand: For DEX you need a DEX cable (often not installed by default in the vending machine).

Steps

1. Restart the machine (30 sec off → on).

2. Restart terminal

   • At the device: Menu → Technician mode → password → Restart

   • Or MoMa App: “Tasks & Warnings” → Tool icon → Restart device

3. Check cables:

   • Unplug and plug back in all connectors in the machine

   • Replace DEX cable if defective

   • Swap yellow Nayax connection cable for testing

4. If the issue persists: Replace terminal (as a last step).

MoMa app: Sync is slow / Data missing

1. Open MoMa → bottom right “More”.

2. Next to “Last data update” tap the sync icon.

3. “Reload data” → confirm.

“Out of Order”

1. Restart machines (restart) (30 sec. off → on).

2. Restart terminal (technician mode or MoMa app).

3. If still not working: clean SIM card like in M05 (above).

Terminal only shows Nayax logo

Often during transport the antenna gets disconnected from the board.

Steps: Disconnect power → Open the back of the terminal → Attach antenna firmly → turn on.

Status "Power Down" (MoMa)

Means: The machine was shut down – disconnected from power or power outage.

Safety & Best Practice

• Before working on the device: turn off power.

• APN & SIM tariff from provider have ready in writing.

• Don't squeeze the antenna, mind the kink protection.

• After each step, only change one variable and test (better troubleshooting).

When should you contact support?

• Recurring M02–M05 despite the steps above.

• Unclear APN/SIM configuration with the provider.

• Suspected hardware defect (modem/terminal/cable).

Nayax support: https://www.nayax.com/support

Contact: https://www.nayax.com/contact