Troubleshooting coin mechanism displaying "Illegal Coin Combination" error. Diagnose sensor faults, logic errors, and environmental factors. Industrial kiosk focus.
Identifying the brand and model allows for specific troubleshooting steps.
Understanding the communication protocol helps diagnose software related issues.
Recent modifications may have introduced the error.
Coin mechanisms typically use a combination of inductive sensors, optical sensors, and mechanical levers to identify and validate inserted coins. These sensors generate analog signals that are converted to digital signals by an internal microcontroller. The microcontroller then compares the coin signature against pre-programmed values to determine coin validity. The error message suggests a discrepancy between the expected and actual signal patterns. The validator logic operates on 24V DC power.
The coin mechanism displays an "Illegal Coin Combination" error. This indicates the coin validation system has detected an invalid combination of coins inserted simultaneously.
The coin mechanism operates on 24V DC. Although this voltage is considered low voltage, care should be taken to avoid direct contact with exposed wiring. Unplug the power supply before performing any maintenance or troubleshooting. Avoid using excessive force when cleaning the coin mechanism to prevent damage to sensitive components. Be aware of pinch points when the mechanism is active.
Implement a regular maintenance schedule to clean the coin mechanism and inspect the wiring harness for any signs of wear or damage. Consider using a desiccant pack within the kiosk enclosure to minimize moisture buildup and corrosion. Ensure the kiosk is located in a well-ventilated area to prevent overheating.
Try inserting a known-good coin combination (e.g., the exact change for a common transaction) to see if the error persists. This can help isolate whether the issue is with a specific coin or a general system malfunction. Check the grounding of the coin mechanism to the kiosk frame. A poor ground can introduce noise and interference into the sensor signals.