Mold-Masters M2 - 7.4 Self Diagnostic Tests; 7.4.1 Why you may need to change your test parameters

MAINTENANCE
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Revised 1 Oct, 2014
7-7
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7.4 Self Diagnostic Tests
The Controller has a diagnostic testing tool, which has two main op-
tions within its test prole.
1. Power Test
Power Test is a facility that can only be used on Current Measuring
cards (6MODC, 4MODC etc). It performs a quick check to see that
just the heater zones are functioning correctly and that the feedback
from current sense coils are consistent with tools history le. It does
not check for zone wiring errors or similar and it is designed as a
maintenance aid only.
2. Full System Test
The Diagnostic test 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 function-
ing correctly.
The following describes the test sequence to show how it works.
1. It cools the whole
tool.
During which time, all zones are checked to see
that none experience a signicant temperature
rise.
2. It heats the rst zone
and checks to see that:
a) the rst zone rises sufciently to qualify as
a “Good Rise” – if not it increases the applied
power and looks for the “Good Rise”. It con-
tinues to raise the power and look for a Good
Rise until the congured “Heat Time” expires. If
it does not see a good rise within that time then
the zone has failed.
b) the temperature of the zone under test does
not reduce further – which would indicate a
reversed thermocouple on that zone.
c) no other zone rises enough to become a “Bad
Rise” which would indicate excessive thermal
conduction between adjacent zones.
d) no other zone rises by as much as the “Good
Rise” which would indicate cross-wiring between
the zone under test and another thermocouple.
3. After completing the
test on the rst zone,
the routine then moves
on to subsequent zones
until all have been
tested.
7.4.1 Why you may need to change your test
parameters
Normally there is no reason to alter the test parameters in your self-di-
agnostic routine. Therefore, if you have any doubts or queries please
contact your supplier for advice before you change any test param-
eters.