Section 10 - Component
Tests and System Alarms
WARNING
Ensure that you have fully read “Section 3 - Safety” before performing any
of the tests in this section.
The user is responsible to ensure protection against shock by indirect
contact, by protective earth conductors and automatic disconnection of
supply.
Mold-Masters
components and systems are either equipped with a
protective earth conductor or there is a connector for this purpose.
10.1 Thermocouple Electrical Test
The controller system has functionality to monitor thermocouple performance.
A working thermocouple will show a realistic temperature based on the
environment it is in. Defective thermocouples will read -100ºC (-148ºF) on the
controller.
• If a thermocouple shows as defective, test the thermocouple at the
support beam or hot runner connector.
• Thermocouples should show output similar to those in the same area.
If the output is significantly different, replace the thermocouple.
• If the new thermocouple shows -100ºC (-148ºF) there is probably a
wiring problem. Check the wiring and connections.
10.2 Heater Continuity Test
WARNING
This procedure requires access to the heater connector. Power down the
machine before disconnecting heater cable.
Testing of the heaters is done with a multimeter set to measure resistance.
The heaters are wired to the connector in pairs according to the wiring
schematic.
• Check the resistance across the pins. The multimeter should show
around 48 ohms for a 1000 W heater and 96 ohms for a 500 W
heater.
• A reading of 0 ohms indicates a shorted heater and a reading of
infinity indicates an open heater.
10.3 Transducer Output Alarm
Transducer function is checked automatically every cycle. If the transducer is
defective, an alarm will be shown on the controller.
10-1
COMPONENT TESTS AND SYSTEM ALARMS
E-Multi User Manual
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