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4.3 Maintenance
The following inspections and maintenance tasks are recommended at least twice
yearly for the best performance.
Make sure no block on airflow around the controller. Clear up any dirt and
fragments on the radiator.
Check all the naked wires to ensure insulation is not damaged by sun exposure,
frictional wear, dryness, insects or rats, etc. Repair or replace some wires if
necessary.
Verify that the indicator display is consistent with the actual operation. Pay
attention to any troubleshooting or error indication. Take corrective action if
necessary.
Confirm that all terminals have no corrosion, insulation damaged, high
temperature, or burnt/discolored sign, tighten terminal screws to the suggested
torque.
Clear up dirt, nesting insects, and corrosion in time.
Replace a new surge arrester in time to avoid damaging the controller and other
equipment.
Risk of electric shock! Ensure all the power is turned off before the
above operations, and then follow the corresponding inspections
WARNING
and operations.
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