Operational Parameter Triggers
Power Supply Anomalies: A multimeter detects output voltage fluctuations exceeding ±10%, or the power supply module surface is abnormally hot.
Environmental Parameter Exceedance: Internal temperature consistently exceeds 45°C or humidity remains above 80% for extended periods; cooling fans fail to operate, preventing proper heat dissipation.
Substandard Grounding: Quarterly inspections reveal lightning protection grounding resistance exceeding 4Ω, indicating a loss of lightning protection capability.
Exterior and Structural Anomalies
Enclosure Damage: Visible rust or deformation on the housing; cracked or detached waterproof gaskets; jammed door locks or hinges preventing proper closure.
Seal Failure: Signs of water ingress or condensation inside the enclosure; damaged waterproof sleeves at cable entry points.
Equipment Functional Anomalies
Signal Faults: Frequent disconnection of internal surveillance equipment or image interference; troubleshooting confirms the cause is poor contact in internal wiring.
Heavy Dust Accumulation: Upon opening the enclosure, circuit boards and components are covered in a thick layer of dust, impeding normal heat dissipation.
