Coinamatic Card Reader: Dispenser Solenoid Failure... | terminalfaults.org

Technical Background:

The card reader processes payment authorization and then sends a signal (likely a low-voltage DC pulse) to a relay or solid-state switch controlling the dispenser solenoid. Failure points include: insufficient voltage output from the card reader's control board, corroded or loose wiring between the card reader and the dispenser unit, a faulty relay switch, or solenoid malfunction. Static discharge events can corrupt the control board's logic.

Symptoms:

Card reader accepts card payment, but the signal to activate the fabric softener dispenser solenoid is not sent or fails to trigger the dispenser.

Possible Causes:

Corrosion or damage to the low-voltage signal cable connecting the card reader to the dispenser solenoid control board.
Failure of the solid-state relay or mechanical relay responsible for switching the solenoid's power supply.
Degradation of the control signal output from the card reader's main board due to component aging or ESD damage.
Solenoid coil failure (open circuit or short circuit).
Loose wiring or connector at the solenoid itself.
Software or firmware glitch in the card reader preventing the dispenser activation signal from being sent.

Solution:

1

Inspect the signal cable between the card reader and the dispenser control board for physical damage or corrosion. Replace if necessary.
2

Use a multimeter to verify the card reader is outputting the correct voltage signal (DC) when a transaction is completed. Refer to the Coinamatic documentation for voltage specifications.
3

Check the voltage at the solenoid terminals when a transaction is completed to ensure the relay is switching properly.
4

Verify the solenoid coil resistance with a multimeter. An open circuit indicates a failed solenoid.
5

Cycle power to the card reader. This may clear transient software errors. Unplug the power supply, wait 60 seconds, and then plug it back in.
6

Clean external card reader contacts with a dry, lint-free cloth to remove any surface contaminants that might interfere with card reading.
7

Inspect all cable connectors for corrosion and loose connections. Reseat connectors firmly.

Safety Warning:

Ensure the power supply to the card reader and dispenser unit is disconnected before performing any inspections or maintenance. Avoid working in wet conditions. Be aware of potential pinch points when inspecting the dispenser solenoid mechanism.

Prevention:

Regularly inspect and clean all external cable connections. Ensure cables are properly secured to prevent strain. Periodically check the solenoid and wiring for corrosion.

Expert Tip:

Check for firmware updates for the card reader. Outdated firmware can sometimes cause communication issues with external devices. Contact Coinamatic support for update procedures. If the relay is accessible, try gently tapping it while a transaction is running; a sticking relay might temporarily start functioning.

Frequently Asked Questions

•What is the voltage specification for the dispenser solenoid signal?

Refer to the Coinamatic technical documentation for the specific voltage range. Typically it's 12VDC or 24VDC.

•Where is the dispenser control board located?

The location varies by model. Consult the Coinamatic service manual for detailed diagrams.

•How do I access the card reader's firmware update menu?

The firmware update process is specific to the card reader model. Contact Coinamatic support for detailed instructions and required software.

Coinamatic Card Reader: Dispenser Solenoid Failure Analysis

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•What is the voltage specification for the dispenser solenoid signal?

•Where is the dispenser control board located?

•How do I access the card reader's firmware update menu?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: