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tolerance supply voltage will be indicated by the LED sequences of
figure 1 on the row of LED's.
The LEDs are labelled N E L to aid fast identification of the source
of common faults. A look up chart on the tester provides further
fault diagnosis. More comprehensive diagnostics are included in
Fig 1 and Fig 2.
Figure 1. Wiring and Voltage Test Indicators
In the event of a fault being indicated, investigation should only be
carried out by a suitably qualified electrician.
Wiring Correct, Voltage OK
Wiring Correct, Voltage high >270V
Wiring Correct, Voltage low <195V
Earth-Neutral voltage >30V
Open Neutral
Open Earth
Phase (Line) Fault
Phase-Neutral Reversal
Phase-Earth Reversal
Serious wiring fault or voltage <125V
6
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