Category Archives: Troubleshooting

Fault Code Failsafe Behavior Chart

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P0A0C – Highest Cell Voltage Too High Fault

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P0A0E – Lowest Cell Voltage Too Low Fault

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P0A10 – Pack Too Hot Fault

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P0A0F – Cell ASIC Fault

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P0ACA – Charge Interlock Fault

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No cell voltages appear (Orion Jr. BMS)

Common Causes: Incorrect Cell Population Settings BMS is configured with default settings (default settings will show no cell voltages). Cell wiring harnesses not connected to the BMS Cell tap wiring error Internal damage to the BMS Note: If the BMS … Continue reading

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Problems connecting to the Orion Jr. BMS unit via PC software

This guide is for the Orion Jr. BMS (plastic unit for 16 cells), pictured below. IIf you have a metal standard Orion BMS unit, click here for troubleshooting steps. Diagnosing communication problems can be frustrating since there are many possible … Continue reading

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P0A0D – Cell Voltage Over 5 Volts

The cell tap harness should be immediately disconnected from the BMS if this fault code is set. Leaving the harness connected to the BMS is likely to cause damage to the BMS and may indicate that a cell is severely … Continue reading

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Orion Jr. BMS does not power up (LED stays off)

The Orion Jr. BMS has an optional low power shutdown that can limit the amount of power drawn from a dead battery. If the Orion Jr. BMS is not powering up, this low power shutdown is likely the cause, particularly … Continue reading

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