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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 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.
Notes: Dangerous with electric shock!
Make sure that all power source of controller is cut
off when operate above processes, and then make
inspection or other operations
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