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5.
Neutral-earth warning light
If the WARNING light is illuminated there is an excessive
voltage present between neutral and earth.
The WARNING light should never be illuminated.
(a) Illumination at time of installation
If the WARNING light flashes as soon as the mains supply
to the ESP unit is turned on, one of the phase/live cables
may have been connected to neutral and the neutral to
phase/live. Isolate or disconnect the ESP unit
immediately. Check the phase/live and neutral
connections and if a mistake has been made, correct it. If
all the phase/live and neutral connections are correct,
there is a fault with the mains supply (see (b) - below).
Note: The ESP unit may have suffered damage - check the
status indication (see section 6).
(b) Illumination at any time
The WARNING light will flash when the neutral to earth
voltage exceeds 30 Volts. The faster the flashing, the
higher the voltage between neutral and earth (at very
high voltages the WARNING light may appear to be
permanently illuminated). Disconnect the ESP protector
immediately and check the mains supply.
Installation instructions for mains wire-in protectors | 5/1
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