Mold-Masters TempMaster MT - Page 82

Table 8-1 Alarm Conditions
Error
Message
Cause Action
LINE No mains supply synchronisation pulses
being received. The three-phase supply
is used in a cross-over detection circuit
to generate timing pulses for accurate
phase control and ring the triac. If the
phase detection fails on one or two phases
then there is no pulse to use to measure
phase angle and the LINE error message
is generated. Meanwhile, all circuits on
the healthy phases will continue to work
normally.
There is a phase detection within the
controller. The most common error is
either the absence of one phase or, if
a plug has been rewired incorrectly, a
swapped phase and neutral. In rare
cases, a fault within the circuit may
cause the LINE error message. If a
LINE error message occurs, switch
o󰀨 and isolate the controller then
check supply wiring for presence of
all three phases.
REV The card has detected an abnormal input at
the thermocouple termination that indicates
a shorted or reversed thermocouple.
If the REV alarm persists, switch o󰀨
the controller and investigate the
o󰀨ending zone.
The o󰀨ending zone can also be
slaved to a good zone until you have
time to clear the fault.
T/C An open circuit thermocouple has been
detected and no auto-response has been
selected in the T/C Open Error column of
the Setup page.
For immediate recovery you can
either slave that control zone to an
adjacent zone or change to open
loop control.
Individual Card Diagnostics - continued
8-2
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