Fujitsu F53 Bill Diverter Solenoid Jam Analysis - Solar... | terminalfaults.org

Technical Background:

The Fujitsu F53 bill diverter uses a 24V DC solenoid to actuate the diverter mechanism. Solenoid activation is controlled by the main control board. Diagnostic data includes solenoid resistance (nominal range: 20-30 Ohms), activation voltage (24V DC +/- 10%), and activation signal duration (pulse width modulated signal, typically 50-150ms). Low temperatures (-40C) increase solenoid coil resistance and reduce actuator speed. Polymer bill composition (if applicable) affects friction within the bill path.

Symptoms:

Observed malfunction: Intermittent or complete failure of the bill diverter solenoid. This results in bills not being properly routed within the validator, leading to jams and 'out of service' errors. Frequency varies with ambient temperature and bill volume.

Possible Causes:

1. Solenoid coil degradation: Internal short circuits or open circuits due to thermal cycling or prolonged use. Increased coil resistance reduces actuation force.
2. Mechanical obstruction: Foreign objects (debris, dirt, bill fragments) blocking the diverter mechanism. This increases the load on the solenoid, potentially causing it to stall or overheat.
3. Power supply issues: Insufficient or unstable 24V DC power to the solenoid. Voltage drops can occur due to wiring corrosion or power supply component failure.
4. Control board malfunction: Failure of the driver circuitry on the main control board that controls the solenoid activation signal. This can result in no activation signal or a weak/erratic signal.
5. Connector corrosion: Oxidation or corrosion on the solenoid connector pins, resulting in increased resistance and reduced voltage at the solenoid.
6. Extreme temperature effects: Low temperatures can increase the viscosity of lubricants in the diverter mechanism, increasing friction. High temperatures can cause thermal expansion and exacerbate mechanical binding.

Solution:

1

Visually inspect the bill diverter area for any visible obstructions or debris.
2

Verify the 24V DC power supply output voltage using a multimeter. Ensure it is within the specified tolerance range.
3

Measure the solenoid coil resistance using a multimeter. Compare the reading to the nominal range (20-30 Ohms).
4

Check the solenoid connector for corrosion. Clean the connector pins with a contact cleaner if necessary.
5

If the validator has a diagnostic mode, use it to test the solenoid activation. Monitor the solenoid voltage during activation.
6

Check the bill path for any signs of excessive friction or binding.
7

Document all observations and measurements for future reference.

Safety Warning:

The Fujitsu F53 operates on 24V DC. While this is generally considered low voltage, exercise caution when working with electrical components. Ensure the power supply is disconnected before performing any maintenance or repairs. Be aware of potential pinch points in the bill diverter mechanism. Follow Lockout/Tagout (LOTO) procedures to ensure the device remains de-energized during maintenance.

Prevention:

Regularly clean the bill validator and surrounding area to prevent debris buildup. Implement a scheduled maintenance program that includes inspection and cleaning of the bill diverter mechanism. Apply dielectric grease to connector pins to prevent corrosion. Ensure proper cable strain relief to prevent connector damage.

Expert Tip:

A temporary solenoid jam can sometimes be resolved by rapidly cycling the power to the bill validator. This can dislodge minor obstructions or reset a stalled solenoid. However, this is not a permanent solution and should be followed by a thorough inspection and cleaning.

Frequently Asked Questions

•What is the acceptable resistance range for the F53 bill diverter solenoid?

The nominal resistance range for the F53 bill diverter solenoid is 20-30 Ohms.

•What voltage should be present at the solenoid during activation?

The voltage at the solenoid during activation should be 24V DC +/- 10%.

•What type of lubricant is recommended for the bill diverter mechanism?

A light, synthetic grease specifically designed for electromechanical components is recommended. Avoid using lubricants that can attract dust or debris.

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•What is the acceptable resistance range for the F53 bill diverter solenoid?

•What voltage should be present at the solenoid during activation?

•What type of lubricant is recommended for the bill diverter mechanism?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: