HPF Hardware Protection Fault fault in delta drive

HPF Hardware Protection Fault fault in delta drive troubleshooting

Description

HPF is a critical hardware failure message. It usually refers to the control circuit detecting a severe anomaly in the power section or current sensor feedback loop that is impossible to correct via software.

Causes

1. Current Sensor Failure: The Hall Effect sensors measuring output current are giving impossible readings (e.g., current when stopped).
2. Thermistor Failure: The internal temperature sensor circuit is open or shorted.
3. Auxiliary Power Fault: The internal power supply generating +/- 15V for the gate drivers is failing.

Solution

This is rarely user-serviceable:
1. Reset and Retry: Power cycle the drive.
2. Service: If the fault appears immediately upon power-up (before running), the drive has internal component failure. Send for repair or replace the unit.