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If a wiring fault is detected or the supply voltage is out of tolerance
the top loop indicator LED's will not illuminate as a loop impedance
measurement is not made.
Figure 1. Wiring and Voltage Test Indicators (Lower LED's)
In the event of a fault being indicated, investigation should only be
carried out by a suitably qualified electrician.
6
Wiring Correct, Voltage OK
Wiring Correct, Voltage high >270V
Wiring Correct, Voltage low <195V
Earth-Neutral voltage >30V
Open Neutral
Open Earth >500Ω
Phase (Live) Fault
Phase-Neutral Reversal
Phase-Earth Reversal
Serious wiring fault or voltage <40V
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