Troubleshooting

Why Does a Phase Protection Relay Turn Red and Stop a Hydraulic Inspection Lift?
A hydraulic inspection lift may stop when its phase protection relay turns red. Learn how phase loss, voltage imbalance, wiring, relay settings, and temporary voltage drops can trigger protection, and why removing the relay is not the safest solution. Read more...
Electrical wiring inspection inside a 7.5kW three-phase inspection lift control box
Electrical Wiring Check: Correcting a Cable Size Mistake on a 7.5kW Inspection Lift
A customer inspection revealed that 2.5mm² cable had been installed instead of the specified 4mm² cable in a 7.5kW inspection lift. Here is how the issue was corrected and what... Read more...
Troubleshooting: Humming Noise During the Upward Movement of a Guide Rail Lift
After commissioning a new guide rail lift, a customer noticed a humming noise during upward movement. Our engineers traced the issue to hydraulic cylinder friction and resolved it through piston rod lubrication and hydraulic oil adjustment — without replacing any parts. Read more...
Troubleshooting: Why Did the Rubber Guide Roller on a Home Lift Start Peeling Off?
When a customer in Nigeria reported that the rubber guide rollers on their home lift kept peeling off, we investigated the root cause — high ambient temperatures softening the rubber under repeated contact. This case led us to switch to polyurethane guide rollers across our newly produced home lifts, improving heat resistance and long-term reliability without sacrificing quiet operation. Read more...
Why Is a Hydraulic Guide Rail Lift Shaking During Up and Down Movement? A Real Troubleshooting Case
A newly installed hydraulic guide rail lift was shaking and jerking during both upward and downward movement. After systematically ruling out guide rails, rollers, safety wire rope, and the pump station, the root cause was identified as trapped air inside the hydraulic cylinder and lines. This post walks through the full diagnosis and the simple bleeding procedure that resolved the issue. Read more...
Troubleshooting: Why Does a Lift Still Show “Down” After Reaching the First Floor?
A lift can physically reach the first floor and still fail to recognize it has arrived — not because of a hydraulic or PLC fault, but because the first-floor limit switch is installed in the wrong position. This article walks through a real customer case, explains the difference between a mechanical stop and a position limit switch, and provides a step-by-step troubleshooting checklist to diagnose and fix the problem. Read more...
Scissor Lift Platform Tilting Due to Off-Center Loading: Causes, Risks and Prevention
Learn why hydraulic scissor lift platforms tilt under off-center loading, why guide rails cannot fully prevent it, and how installing a tilt sensor can protect your equipment and operators from structural damage. Read more...
Troubleshooting: Home Lift Reaches the Ground Floor but the Landing Door Won't Unlock
A home lift reaches the ground floor but the landing door stays locked. Learn how we diagnosed the issue remotely — from PLC logic to hydraulic valve adjustment — and resolved it with a simple fix. Read more...
Why Proper Grounding in a Control Cabinet Matters More Than We Realized
A real-world account of how induced voltage in a lift control cabinet led us to redesign our grounding approach — and why proper earthing is essential for safety, PLC stability, and VFD performance. Read more...
Home Lift Troubleshooting: One Folding Door Reopens When Closing the Other Door
A customer reported that closing one folding door on their home lift caused the other to reopen. This case study explains the root cause — trapped air pressure — and the simple 5 mm floor clearance fix that resolved it. Read more...
Why Low Input Voltage Can Cause VFD Faults in Home Lifts
When a home lift stops immediately after pressing UP and the VFD displays an ELUO fault, the cause is often low input voltage rather than inverter failure. This article explains how under-voltage protection works, why manual mode may still function normally, and how to check wiring and supply voltage to resolve the fault. Read more...