Seaward Supernova Elite - Manual (Page 84)

Safety Tests during operation
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The Tester will fail the earth check if it is being supplied with a
balanced supply (e.g. isolating transformer) since it will detect phase
voltage on both L and N supply connections. Only continue if certain
that the supply is balanced and the earth on the Tester connection is
secure.
If all the above is checked OK then the Supernova Elite may be
faulty. Contact your Seaward Agent for repair.
The unit then completes an internal check. If any faults are found
then the following message will be displayed: -
--------------------WARNING--------------------
INTERNAL RELAY FAULT.
CANNOT PROCEED.
If this message is displayed then the Supernova Elite is faulty and
should be returned to you Seaward Agent for Repair
Safety Tests during operation
The Tester performs self-tests during normal operation. An internal
earth bond test and a low voltage test are performed prior to applying
mains power to any EUT (including Leakage tests). If the internal
earth bond test failed, the following message will be displayed: -
--------------------WARNING--------------------
INTERNAL RELAY FAULT.
CANNOT PROCEED.
If this message appears, the Supernova Elite is faulty and requires
repair. Contact your Seaward Agent for repair.
Safety Tests during operation