Nayax Modem Error Codes on Vending Machines: M01, M03, M05 or M02?
A vending payment terminal showing “Cash Only” does not identify the failed part. If a Nayax modem code appears beside the message, record it before replacing hardware. A countdown screen is another useful symptom, but it should be reported with the exact display and terminal model.
Nayax’s official modem error code overview separates hardware-related modem conditions from network connection problems. The distinctions below help an operator choose the relevant provider guide and prepare a service request. They are not a record of a WEIMI repair.
M01: the modem does not detect a SIM or Ethernet connection
Nayax describes M01 as a modem that cannot detect a SIM card or an Ethernet connection. Its quick-reference table lists reseating the SIM as the first check for the cellular path. That is a different question from whether a carrier has coverage at the location.
Record whether the installed terminal is intended to use cellular service or Ethernet. Follow the provider’s instructions for the exact equipment before handling a card or connection. Do not apply a cellular check to an Ethernet installation simply because both can show a communication problem.
M03 or M00: initialization has stalled
The official overview groups M03 and M00 with a modem stuck during initialization. The visible symptom can be a device frozen on the Nayax logo, with a QR code possibly appearing. Report that startup state and the code together.
The source lists a SIM reseat as an initial check, but the complete procedure belongs to the relevant Nayax troubleshooting guide. Avoid repeated restarts or configuration changes without recording what was done. A frozen logo alone is not enough evidence to choose a replacement terminal.
M05: communication with the modem has failed
Nayax defines M05 as a failure during communication with the modem and places it in the hardware-related group. The same general Cash Only or Cashless Out of Order wording can accompany it.
Keep M05 in the support record rather than shortening the report to “cards not working.” Ask the payment-equipment provider for the procedure applicable to the terminal model. The overview’s initial SIM check does not prove that a SIM replacement will resolve every M05 event.
M02 or M06: investigate network access
Nayax groups M02 and M06 as network faults. Its reference describes inability to connect to cellular service or Ethernet, and it associates a countdown screen most often with these codes. For the cellular path, the overview points to a SIM or carrier connection issue.
Confirm the actual connection path with support before buying parts. A countdown screen does not establish which carrier, SIM arrangement or replacement is suitable for your installation. Follow the network-specific guide and have the provider review the service at the actual location. The source’s suggestion to replace a SIM is not a universal instruction to insert any available SIM.
Send a support record that preserves the distinction
Nayax asks for the device serial number, error code and troubleshooting steps already completed when further help is needed. Include the observed screen, time, terminal model and any recent equipment or service changes. Keep payment-card data out of screenshots.
These modem codes concern internet connectivity. For V00, V01 or V02, use the separate Cash Only MDB code guide; those codes describe the reader’s interaction with the vending controller. Buying an antenna from the wording of an out-of-order message alone can miss that distinction.
For a new machine order, ask WEIMI to identify the proposed payment terminal, connection path and responsible support provider. Share your destination and installation context so the quotation can address the actual configuration. Get My Custom Quote.
