Risk of electric shock!
Make sure that all the power is turned off before above operations, and then
follow the corresponding inspections and operations.
7.3 Maintenance
The following inspections and maintenance tasks are recommended at least two times per
year for best performance.
Make sure no block on air-flow around the controller. Clear up any dirt and fragments on
radiator.
Check all the naked wires to make sure insulation is not damaged. Repair or replace some
wires if necessary.
Tighten all the terminals. Inspect for loose, broken, or burnt wire connections.
Check and confirm that LCD is consistent with required. Pay attention to any
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.
Check for dirt, nesting insects and corrosion. If so, clear up in time.
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