APC C5 Surge Protector User Manual


 
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“Wiring OK Indicator” LED is not illuminated.
Probable Cause: There are 3 reasons why this LED would not be
illuminated:
1. Reversed polarity exists at the wall outlet.
2. Neutral wire is overloaded.
3. Earth ground is missing at the wall outlet.
Solution: Operating the unit under such conditions may impact its
surge protection performance. Contact an electrician to have them
inspect the building or home wiring to fix the problem.
Probable Cause: Unit is on but LEDs are turned off.
Solution: Push the Power button, push the Select button twice (turns
the unit off and back on again). The LEDs should illuminate.