Section 7 - Maintenance
WARNING
Ensure that you have fully read "Section 3 - Safety" before doing
maintenance procedures on the controller.
Maintaining the controller includes checking records and settings, and
running self-diagnostic tests.
There are no user serviceable parts inside the touchscreen controller. In the
unlikely event of equipment failure, return the unit for repair.
7.1 Self Diagnostic Tests
The controller has a diagnostic testing tool, which allows you to check that
every zone is functioning correctly.
It is the correct routine that you should use:
• as an acceptance check
• to see that a new tool is wired up correctly
• as a maintenance aid, to check that a working tool is functioning
correctly
7.2 How the Test Works
The following describes the test sequence to show how it works.
It applies 10% power and observes that:
(a) the temperature of the zone under test does not reduce further –
which would indicate a reversed thermocouple on that zone
(b)
the zone under test rises sufficiently to a set level – if not it increases
the applied power and looks again for that temperature rise. It
continues to raise the power and look for the expected temperature
until a set timer expires. If it does not see the right temperature within
the right time, then the zone has failed
(c)
no other zone rises by as much as the first set temperature, which
would indicate cross-wiring between the zone under test and another
thermocouple
(d)
no other zone rises significantly which would indicate excessive
thermal conduction between adjacent zones
After completing the test on the first zone, the routine then moves on to
subsequent zones until all have been tested.
At the end of the test it builds a list of results to show how the test
progressed.
7-1
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MAINTENANCE
Me6 & Me12 Controller User Manual
