Wittmann Tempro Plus D 360 Manual Site

| Alarm Code / Symptom | Likely Cause | Solution | | :--- | :--- | :--- | | Low Flow / Flow Alarm | Pump cavitation, closed valve, or clogged filter. | 1. Bleed air from the pump (bleed screw).
2. Clean the Y-strainer.
3. Check hose connections. | | High Temp Alarm | Setpoint exceeded; cooling water failure. | 1. Check if cooling water supply is open.
2. Check if cooling solenoid valve is stuck closed. | | Low Temp Alarm | Heater failure or cooling valve stuck open. | 1. Check contactors/heaters.
2. Inspect cooling valve for debris holding it open. | | Leakage Alarm | Internal or external leak detected. | Check float switch in drip tray or expansion tank level. | | Pump Noise | Air lock or worn bearings. | Bleed the pump shaft seal or replace bearings. |

The "Plus" series adds a microprocessor-based controller with a backlit LCD display. Unlike older analog units, the Plus D 360 uses digital temperature sensing (thermocouple type J or Pt100, as noted in the wiring schematic of the manual). Wittmann Tempro Plus D 360 Manual

| Alarm Message | Likely Cause | Corrective Action | |---------------|--------------|--------------------| | Overtemperature | Heater stuck ON or cooling supply failed | Check cooling water pressure (min 2 bar). Measure heater relay contacts for welding. | | Low flow | Pump cavitation, clogged mold channels, or air lock | Perform manual air purge. Isolate mold and check flow with a bypass hose. | | Level sensor dry | Water leak or fill supply closed | Inspect hoses and mold. Verify that the external fill valve (if used) is open. | | Pressure switch triggered | Blocked mold or closed shut-off valve | Open the mold flow and return valves. Run pump at 30% speed to diagnose. | | Sensor break | Pt100 open circuit | Check wiring at terminal block X3. Replace sensor (part no. 528.110). | | Alarm Code / Symptom | Likely Cause