Has your scissor lift suddenly stopped and displayed an "18 alarm fault" on the panel? This is one of the most common alarms our service team sees on Sino Lift self-propelled scissor lifts. In most cases, the cause is minor and can be resolved in just a few minutes with no special tools required.
The 18 alarm fault is a safety-triggered error on Sino Lift self-propelled scissor lifts. It activates when the safety system detects one of the following five conditions that prevent the platform from operating safely:
Lower the platform to ground level first. Visually inspect the flip plate area underneath the device. Small stones, debris, or loose wire can trigger the 18 alarm.
Recommended fix: Remove any foreign objects from the bottom of the flip plate. Restart the device and resume operation.
Open the bottom drawer of the device and check whether the pit protection switch is stuck by foreign objects. This is one of the most common causes of the 18 alarm fault reported by our service team.
Recommended fix: Clean any foreign material around the switch. Close the drawer and restart the device.
Rusty or corroded screws on the flip plate can cause intermittent sensor contact, which may trigger the 18 alarm.
Recommended fix: Apply a rust remover spray to the affected screws. Allow it to penetrate for 15 minutes. Test the device to confirm normal operation.
A damaged gas spring or pit protection switch can trigger the 18 alarm repeatedly. Visible damage typically requires component replacement.
Recommended fix: If visible damage is found, replace the gas spring or pit switch. Genuine Sino Lift replacement parts can be ordered through our parts team.
The pressure bar at the base of the unit can also become stuck with debris, especially in outdoor or construction environments.
Recommended fix: Clear any foreign objects from the pressure bar. Restart the device.
If the 18 alarm fault persists after completing all 5 steps above, the issue may be related to the control board or electrical system, which requires professional diagnosis.
Contact the Sino Lift technical support team for free remote diagnosis. We support all Sino Lift self-propelled scissor lift models.
Based on our service records, regular maintenance significantly reduces the chance of the 18 alarm fault occurring. We recommend the following inspection schedule:
The 18 alarm fault is a safety-triggered error that activates when the system detects an unsafe condition, most commonly an obstruction or sensor issue. It is designed to prevent the lift from operating until the cause is resolved.
Yes, in most cases. Lower the platform to ground level first, then identify and clear the cause as described in the 5-step guide above. After addressing the cause, restart the device.
If the 18 alarm fault reappears after clearing the immediate cause, the underlying component (gas spring or pit switch) may be worn and require replacement. Contact Sino Lift's technical support for parts ordering and replacement guidance.
Warranty coverage depends on the specific cause and your purchase terms. Manufacturing defects are typically covered. Damage caused by lack of maintenance or unauthorized modification is generally not covered. Contact the Sino Lift service team for warranty assessment.
Sino Lift's technical team is available to support you with diagnostic assistance, genuine replacement parts, and on-site service when needed.
Contact Sino Lift Technical Support →
