Fault Phenomenon: Aichi insulated aerial work platform during insulation testing, leakage is detected in the insulated boom, failing safety standards.

Troubleshooting Process:
– Checked boom surface: surface dirty and damp.
– Checked internal fiberglass: fiberglass delamination.
– Checked metal inserts: inserts corroded.
– Checked cleanliness: not cleaned.

Root Cause: The insulated boom surface is dirty and damp, or there is an internal fiberglass defect.

Required Parts: Insulated boom cleaning and drying or replacement.