Sorting out three common faults:

- Poor contact: Core causes include terminal surface oxidation (accelerated by humid/high-temperature environments), insertion and extraction wear (high-frequency operations thin the contacts), and loose locking (connection gaps increase in vibration scenarios);

- Short circuit problem: Mainly caused by aging and damage of insulation layer (long-term high temperature/chemical corrosion), foreign object intrusion (dust/metal debris entering the contact end), and pin misalignment due to incorrect insertion;

- Abnormal heating: Core reasons are overload operation (actual current exceeds rated value), excessive contact resistance (caused by oxidation/wear), and poor heat dissipation (heat accumulation in closed environments).

Regular maintenance plan:

- Cleaning maintenance: Wipe the connector shell with a dry cloth monthly, clean terminal contacts with special cleaner quarterly (once a month for outdoor scenarios), and avoid using corrosive solvents;

- Fastening inspection: Check the locking status weekly for vibration scenarios (such as industrial machinery/automotive equipment), and monthly for non-vibration scenarios to ensure the latch is in place and screws are not loose;

- Environmental control: Install moisture-proof covers in humid environments, keep away from heat sources and reserve heat dissipation space in high-temperature scenarios, regularly clean debris around equipment in dusty industrial workshops to avoid foreign object accumulation.