HdA Hardware Error (A/D Converter) fault in delta drive

HdA Hardware Error (A/D Converter) fault in delta drive troubleshooting

Description

HdA is a severe internal hardware failure. It indicates that the Analog-to-Digital (A/D) converter on the main CPU board is malfunctioning. This chip is responsible for reading currents, voltages, and temperature sensors.

Causes

1. Component Failure: The CPU board component has failed due to age or defect.
2. Electrical Noise: Extreme EMI/RFI noise spiked into the control terminals, scrambling the A/D latch.
3. Ground Loop: Poor grounding caused a potential difference that fried the analog input circuit.

Solution

This is usually fatal for the board:
1. Power Cycle: Turn off, wait 5 minutes, turn on. If it clears, check grounding and shielding immediately.
2. Remove I/O: Unplug all control terminals (green blocks). Restart. If fault persists, the board is dead.
3. Replace Drive: If the error is solid, the control card or drive must be replaced.