Genie 2668RT Scissor Lift: Running Only While Holding Starter

[MikePhua]

The Genie 2668RT scissor lift is a robust piece of equipment commonly used for aerial work. However, users have encountered issues where the scissor lift only operates while the starter is held. This problem is typically associated with electrical and safety system malfunctions. Below is a detailed guide to help diagnose and solve the problem.
Symptoms of the Problem
The main symptom of this issue is that the scissor lift will only run as long as the starter is being held. Once the starter is released, the lift will stop running. This indicates an issue with the ignition or safety system, preventing the machine from operating normally once the starter circuit is disengaged.
Step 1: Check the Starter and Electrical Connections
A common cause for this issue is a fault within the electrical system, especially concerning the starter motor and connections.

1. Inspect Starter Wiring: Ensure all connections to the starter motor are secure and free from corrosion. Loose or corroded wiring can lead to inconsistent electrical contact, preventing the machine from functioning properly once the starter is released.
   
2. Starter Motor Functionality: Test the starter motor to ensure it’s working correctly. A malfunctioning starter motor can sometimes fail to disengage, leading to the machine running only while the starter is engaged.
   
3. Battery Voltage: Check the battery’s voltage and condition. Low voltage can prevent the system from fully engaging after the starter is released.
   

Step 2: Investigate the Safety System
Genie lifts are equipped with safety systems designed to prevent operation under certain conditions. These systems can sometimes be responsible for the issue where the machine only runs while the starter is held.

1. Check the Emergency Stop Button: Ensure that the emergency stop button or switch is not engaged. If this button is pressed, the lift may not start or continue running after the starter is released.
   
2. Joystick and Operator Safety Features: Inspect the joystick and other operator controls for malfunction. Some lifts have interlock systems that prevent operation if the controls are not properly engaged or if safety features are triggered.
   
3. Interlock Relays: The interlock relay system may be malfunctioning. This system is responsible for ensuring that all safety conditions are met before the lift operates. A stuck or faulty relay can cause the lift to only run when the starter is held.
   

Step 3: Examine the Ground and Operator Presence Switch
The ground and operator presence switch are critical components in ensuring that the scissor lift only operates when it’s safe to do so. If there is a fault in these switches, the lift may exhibit behavior where it runs only when the starter is held.

1. Operator Presence Switch: Check the operator presence switch to ensure it is functioning properly. If the switch fails, the machine might think the operator is not present and will not operate normally.
   
2. Ground Switch: Similarly, inspect the ground switch that detects the lift's position. If this switch is faulty, it might prevent the lift from disengaging the starter properly.
   

Step 4: Inspect the Safety Sensors
Some Genie scissor lifts come with various sensors that prevent the lift from moving in unsafe conditions. These sensors can sometimes malfunction, leading to issues with operation.

1. Lift Position Sensors: Check the lift position sensors to ensure they are not sending incorrect signals to the control system. Malfunctioning position sensors can prevent the lift from running properly once the starter is released.
   
2. Tilt Sensors: If the tilt sensor is triggered, it might prevent the lift from operating in certain situations. Verify that the tilt sensor is not engaged or malfunctioning.
   

Step 5: Check the Control Panel and Circuitry
The control panel and its associated circuits are the brain of the machine. A fault in the control panel circuitry can prevent the lift from running after the starter is disengaged.

1. Control Panel Diagnostics: Use any diagnostic tools available to check for faults in the control panel. Many modern lifts have built-in diagnostic features that can help pinpoint electrical issues.
   
2. Circuit Breakers and Fuses: Inspect all relevant circuit breakers and fuses. A blown fuse or tripped circuit breaker may prevent normal operation.
   

Step 6: Consider Professional Help
If the issue persists after following these steps, it might be necessary to consult a professional technician with experience in Genie equipment. These lifts have complex electrical and safety systems that require specialized knowledge for proper diagnosis and repair.
Conclusion
The issue of the Genie 2668RT scissor lift running only while holding the starter is typically related to electrical, safety, or control system malfunctions. By following the above steps, you can diagnose the root cause of the issue and take corrective action. If necessary, don't hesitate to reach out to a professional for further assistance. Regular maintenance and timely inspections are key to ensuring the continued reliable operation of your scissor lift.