1. Check the hydraulic safety sensor.
-
Access the IO Input page and monitor contact pin 24 (water pressure test pin). When closing the mold, if the signal consistently returns 24V (without turning off), it is incorrect.
-
Sensor testing: Remove the sensor and use a metal object (such as an Allen wrench) to test it. If the light on the sensor illuminates when a metal object is brought near it, the sensor is working properly.
-
Solution: Reinstall and adjust the sensor’s position for accuracy.
2. Check the relays in the electrical panel.
-
Observe the relay indicator light: In the normal state (not molding), the light should be on, and when molding is in progress, the light should be off.
-
If the relay light does not illuminate despite receiving 24V power, the relay needs to be replaced.
-
Check the relay contacts: Use a continuity tester to check the normally open contacts. If the relay is energized but the contacts are not conducting, then those contacts are faulty; you can switch to the spare contacts next to them.
3. Swap the IO contact pins on the motherboard.
-
If the relay is working correctly but the motherboard is receiving an incorrect signal from pin 24, that pin may be faulty.
-
How to switch to a spare pin: The technician will instruct you to switch from pin 24 to the spare pin (e.g., pin 11 ).
-
Go to the configuration page (F6), enter the password 1234 , and select the page to change the input port address from 24 to 11.
-
Hardware operation: Move the corresponding signal wire on the motherboard to the new pin 11 position.
-
Sequential testing, starting from external sensors and intermediate relays to signal input ports on the circuit board, helps pinpoint the exact location of the fault for thorough troubleshooting.