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4.3 Maintenance
The following inspections and maintenance tasks are recommended at least two times per year for good
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 for sun exposure, frictional wear,
dryness, insects or rats, etc. Repair or replace some wires if necessary.
Verify the indicator display is consistent with the actual operation. Pay attention to any
troubleshooting or error conditions. Take necessary corrective action.
Confirm that terminals have no corrosion, insulation damaged, high temperature, burnt/discolored
sign, and tighten terminal screws to the suggested torque.
Clear up dirt, nesting insects, and corrosion in time.
Check and confirm that the lightning arrester is in good condition. Replace a new one in time to
avoid damaging the controller and even other equipment.
Risk of electric shock! Ensure that the power is turned off before the above
operations, and then follow the corresponding inspections and operations.
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