TROUBLESHOOTING
© 2014 Mold-Masters (2007) Limited. All Rights Reserved.
Revised 1 Oct, 2014
8-1
Section 8 - Troubleshooting
The control system has several features, which provide an early
diagnosis of faults in the control system, the tool heaters and thermo-
couple sensors.
If the system detects any malfunctions, in one or more of the control
zones, then it displays an error message on the main page in place of
a temperature value.
If the system detects any abnormal condition it displays a warning
message in the Main menu.
8.1 Fault and Warning Messages
Any of the following messages may be displayed on the Fault
Indication line:
Error
Message
Cause Action
AMPS
The controller is unable to supply the current
requested. (Note: This error message is most likely
to be seen if the particular zone is set as a Spear
type).
Isolate system supply, check loom
and heater wiring continuity. Also,
check the heater resistance against
other known good zones to see
that it is not noticeably higher than
average.
ERR!
Little or no temperature rise has been detected in
that zone. When the console starts to apply power
it expects to see an equivalent heat rise at the ther-
mocouple. If the thermocouple has been trapped
and pinched elsewhere in the tool or cable then it
cannot see the full heat rise that occurs at the tip.
If left uncorrected then there is a danger that the
zone could overheat and damage the tip. Instead
the circuit maintains the output at whatever level it
reached when the monitor circuit detected the fault
and the error message was displayed.
Check thermocouple wiring, it may
be reversed. Heater wiring may
be faulty or element may be open
circuit.
FUSE
The fuse for that zone has failed.
Please Note: A fuse can only fail due to a fault ex-
ternal to the controller. Identify and rectify the fault
before replacing the fuse.
Note: The fuse detection circuit requires a continu-
ous low level current through a high impedance
bleed resistor to maintain the alarm condition. As a
result the load circuit is still connected to the mains
voltage supply and it is not safe to attempt to repair
or replace the fuse without rst isolating the circuit.
If the fuse in question is mounted on a control card
then it is safe to unplug the board in order to isolate
the circuit and replace the fuse on the card.
Replace the fuse with one of the
same rating and type, i.e. High
Rupture Current load fuse. The
blown fuse is located either on the
control card or on the off-board triac
module (If tted).
GND The system has detected an ground fault.
Check your heater wiring for a low
impedance path to ground.
To Next Page
Loading...
