Progress Solar/Wind SLT 700 Series Operator's Manual page 24

Charge Controller:
Tighten all terminals. Check for broken, lose or charred wire connections.
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Clean area surrounding the controller and free any debris that may be lodged.
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Maintain airflow around the controller.
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Keep controller out of a wet environment. Make sure there are no leaks in the
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control box that may affect the controller.
Check the controller functions and LED indicators on the controller for correct
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operation and current settings.
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