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Defective controller board

Defective controller board — Vendor rejects coins

Candy · MARS Series Vending Machines

What does Defective controller board mean?

The vending machine rejects all coins because the main controller board has failed. This board manages all operations, including coin processing.

Common Causes

  • Failure of the main controller board

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Verify all other components are functioning correctly.

  2. 2

    If other components are ruled out, the controller board likely needs replacement.

  3. 3

    Contact support for replacement and installation of the controller board.

Browse all codes in this manual (36)
Verified technical data. Last updated: April 2026

Related Faults

3 beeps then stop3 beeps then stop — Motor fault detectedA1 High CurrentA1 High Current — Motor detected high current usageA1 Low CurrentA1 Low Current — Motor failed due to low current or motor not found
Source: Candy MARS Series Vending Machines
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