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5.3 MAINTENANCE
The following inspections and maintenance tasks are
recommended at least two times per year for best
performance.
Make sure controller firmly installed in a clean and dry
ambient.
Make sure no block on air-flow around the controller.
Clear up any dirt and fragments on heat sink.
Check all the naked wires to make sure insulation is
not damaged for sun exposure, frictional wear,
dryness, insects or rats etc. Repair or replace some
wires if necessary.
Tighten all the terminals. Inspect for loose, broken, or
burnt wire connections.
Check and confirm that LED is consistent with required.
Pay attention to troubleshooting or error indication.
Take corrective action if necessary.
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.
Clear up dirt, nesting insects and corrosion in time.
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 equipment.
WARNING：Risk of electric shock!
Make sure that all the power is turned off before above
operations, and then follow the corresponding inspections
and operations.
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