MAINTENANCE
© 2014 Mold-Masters (2007) Limited. All Rights Reserved.
Revised 1 Oct, 2014
7-11
How to Interpret the test results - contd.
7.7.1 Satisfactory Test
If the diagnostic test nds no fault with any zone then the message
“Zone Test OK” is displayed.
7.7.2 Unsatisfactory Test
If the test detects any problems then it displays an error message
against the particular zone. Below is a complete list of the various
messages along with further detail and possible causes.
User skipped - You skipped the test for this zone by pressing [Skip]
while it was being tested.
User Stopped - You aborted out of the test by pressing [Stop].
T/C - Thermocouple detected as being open circuit. Check thermo-
couple wiring for displayed zone.
FUSE - Check card fuse. This message is also displayed if the zone
was set to use an off board triac that was not installed. NB. Off board
triacs have their own fuse.
No Mains Sync. Pulse - This is probably due to an error in the
supply wiring.
N/Z - No card was detected in the rack at the slot identied with the
displayed zone.
Heating Test Failed - Temperature did not rise by the set number
of degrees within the heating period. This may be caused by an open
circuit heater, a pinched, shorted or dislodged thermocouple.
REV - Temperature appeared to be decreasing when power was
applied.
Below 0 or Reversed T/C - May be caused by a reversed thermo-
couple. Also, in the unlikely event that the test was carried out at an
ambient temperature below 0°C, the controller would not work with the
resulting negative temperature readings.
Failed to React Correctly - Unexpected results. This message is
followed by further error messages.
T/C Interaction with zone NN? - A different zone(s) to the one be-
ing tested had an unacceptable rise in temperature (greater than Bad
Rise set in Test Values). Indicates faulty T/C positioning or close zone
proximity.
Heater/TC Common with zone NN? - Cross-wiring fault between
displayed zones. Could be either the Heater or the thermocouple wir-
ing at fault.
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