Seaward Supernova XE - Manual (Page 70)

Power -On Self tests:
60
Chapter 4 Tips & Troubleshooting
Power -On Self tests:
When the tester is powered on, a number of messages can possibly
appear as the tester performs safety tests on itself and the mains
power supply.
If a voltage greater than 30V is detected on the neutral input line or
the earth is missing then the following message will be displayed.
--------------------WARNING--------------------
LIVE AND NEUTRAL REVERSED.
PRESS ANY KEY TO CONTINUE
Check for incorrect wiring on supply.
The next test will check for an earth connection. If there is no Earth
connection, the following message will appear.
--------------------WARNING--------------------
POSSIBLE DISCONNECTED,
FLOATING OR ISOLATED EARTH.
CHECK INPUT EARTH BEFORE
PROCEEDING.
PROCEED ONLY IF YOU KNOW THE
INPUT EARTH IS ISOLATED.
PROCEEDING WITH AN INCORRECT
EARTH MAY GIVE INCORRECT TEST
RESULTS.
Check for incorrect wiring on supply.