FAQ: HPC (Standalone)

Q16How do I check the D-Cell battery voltage on-site?

LiSOCl₂ D-Cell batteries have a unique characteristic: they always read approximately 3.6 V on a multimeter whether new or depleted, this is inherent to the chemistry. A direct multimeter reading is therefore unreliable.

• Always measure D-Cell voltage with a load applied (i.e., while the battery is installed and the node is running).
• Do not rely on open-circuit voltage measurements for D-Cell batteries.
• Check the manufacturing date printed on the battery, use only batteries made within the last 3 months.

Q17How do I check the HPC voltage on-site?

The HPC can be measured directly using a multimeter, no load is required (unlike D-Cell batteries).

• Locate the HPC test point on the PCB: it is the soldering point near the battery connector, indicated in the Ackcio HPC guide (orange circle marker).
• Alternatively, you can measure directly on the HPC itself using a multimeter.

Q18Can a client replace the HPC themselves?

The HPC is not a user-serviceable component. Dismantling the PCB to replace the HPC will void the product warranty.

Contact Ackcio support at support@ackcio.com to arrange an HPC replacement.

Q19Where can replacement HPC units be sourced?

Compatible HPC-1550 units are available from several suppliers. Contact Ackcio support at support@ackcio.com before sourcing: only Ackcio should perform the replacement.

Q21Why do reboots occur on nodes, and what should be done?

Frequent reboots are typically caused by one of three issues:

• Insufficient battery: The battery cannot adequately power the system. Action: Replace with a fresh D-Cell manufactured within 3 months and monitor.
• Faulty or shorted sensor: Causes abnormally high current draw. Action: Inspect wiring and validate the sensor using the manufacturer's diagnostic tool.
• Node hardware failure: The node's power supply circuitry has failed. Action: Replace the node or inspect the battery connector.