Fault Phenomenon: Oil&Steel 2614 scissor lift aerial work platform with the guardrail door open, the vehicle can still rise, safety protection failed.

Troubleshooting Process:
– Checked door limit switch: switch normally closed or damaged.
– Checked wiring: wiring shorted.
– Checked door hinge: door deformed, preventing switch activation.
– Checked controller: controller signal bypassed.

Root Cause: The guardrail door limit switch is mechanically damaged or the wiring is shorted.

Required Parts: Guardrail door limit switch.