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5.3 Maintenance
The following inspections and maintenance tasks are recommended at least two
times per year for best controller performance
Check that the controller is securely mounted in a clean and dry environment
Check that the air flow and ventilation around the controller is not blocked Clear all
dirt or fragments on the heat sink
Check all the naked wires to make sure insulation is not damaged for serious
solarization, frictional wear, dryness, insects or rats etc Maintain or replace the wires
if necessary
Tighten all the terminals Inspect for loose, broken, or burnt wire connections
Check and confirm that LED digital tube is consistent with required Pay attention to
any troubleshooting or error indication Take necessary corrective action
Confirm that all the system components are ground connected tightly and correctly
Confirm that all the terminals have no corrosion, insulation damaged, high
temperature or burnt/discolored sign, tighten terminal screws to the suggested torque
Inspect for dirt, insects and corrosion, and clear up
Check and confirm that lightning arrester is in good condition Replace a new one in
time to avoid damaging of the controller and even other equipments
Warning
：
Risk of electric shock!
Make sure all the power is turned off before above operations, and then follow
the corresponding inspections and operations.