Mold-Masters E-Multi EM1 - Section 9

To Next Page

To Previous Page

Section 9 - Troubleshooting

WARNING

Ensure that you have fully read “Section 3 - Safety” before troubleshooting

any issues with the controller.

9.1 Thermocouple Electrical Check

The controller system has functionality to monitor thermocouple performance.

1. A working thermocouple will show a realistic temperature based on the

environment it is in. Defective thermocouples will read -100ºC on the

controller.

2. 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 signicantly

di󰀨erent, replace the thermocouple.

3. If the new thermocouple shows -100ºC there is probably a wiring problem.

Check the wiring and connections.

9.2 Heater Continuity Check

This procedure requires access to the heater connector. Power down the

machine before disconnecting heater cable.

1. Testing of the heaters is done with a multimeter set to measure

resistance.

2. The heaters are wired to the connector in pairs according to the wiring

schematic.

3. Checking the resistance across the pins should show around 48 ohms for

a 1000 W heater and 96 ohms for a 500 W heater.

4. A reading of 0 ohms indicates a shorted heater and a reading of innity

indicates an open heater.

9.3 Transducer Output Check

Transducer function is checked automatically every cycle. If the transducer is

defective, an alarm will be shown on the controller.

9.4 Vibrator Valve Check

1. The vibrator runs on every cycle when the feed screw is turning. If the

vibrator is not moving, check the air pressure to the vibrator by closing the

air needle valve and disconnecting the air line from the supply side of the

valve.

2. Open the needle valve slowly and check for air pressure on the supply

line. If there is no pressure, check the pneumatic connection to the

machine. If there is pressure, close the valve, reconnect the air line to the

valve and open the valve.

9-1

TROUBLESHOOTING

E-Multi Controller User Manual

Mold-Masters E-Multi EM1 - Section 9 - Troubleshooting