TROUBLESHOOTING
© 2014 Mold-Masters (2007) Limited. All Rights Reserved.
Revised 1 Oct, 2014
8-2
Fault and warning messages - contd.
Error
Message
Cause Action
HELP There is a system failure and the console does not
know how to respond.
(This alarm may occur if an older model console
is connected to a later version cabinet. If the early
version console does not recognise an alarm that
has been generated by a later generation control
card then it cannot display an appropriate alarm
message. The console software has a routine to
check incoming messages and it ags up a HELP
message if such a condition arises.
Please make a note of the serial
numbers for both the controller and
console. Also note the console soft-
ware date on the Utilities page.
Contact your supplier with this
information to hand.
HIGH The water-ow sensor has detected a high ow
rate.
These are only monitored con-
ditions, and neither will cause
any shutdown, or pause, action.
However, you should check that
the coolant water system is not
blocked, or leaking, to ensure that
no overheating occurs.
LOW The water-ow sensor has detected a low ow
rate.
LINE No mains supply synchronisation pulses being re-
ceived. 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. Mean-
while, all circuits on the healthy phases will con-
tinue to work normally.
There is a phase detection circuit
on each K-Series card and a com-
mon phase detection circuit on all
other controller types. Although a
fault in such circuits may cause the
LINE error message, such fault is
very rarely seen. The most com-
mon error is either the absence of
one phase or, if a plug has been
re-wired incorrectly, a swapped
phase and neutral. If a LINE er-
ror message occurs then switch
off and isolate the controller then
check supply wiring for presence of
all three phases.
LINK This will occur if the console is switched to a
remote controller with a network link but it cannot
establish any communication with the remote unit.
The console can display the appropriate zones for
the particular tool but it cannot relay any tempera-
ture information. It shows a LINK fatal error in
place of the actual temperature.
Check that the network link is good
and/or the remote controller is still
switched on and available.
LOAD No load on that zone. Only occurs when in manual
closed loop mode where the current is pre-set. The
current sensing circuit has not detected a current
ow; therefore, the zone is agged as not having a
load.
Isolate the system supply and
check the connections between
the controller and the tool heaters.
Also, check the heater for continu-
ity
OVER The RTD zone has detected a temperature in ex-
cess of 99°C. This is an abnormal alarm because
RTD circuits can only read from 0-99 deg so a fault
must be suspected and investigated. Meanwhile,
no control zones are affected.
Check that a different RTD has not
been tted.
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