External AC Contactor Malfunction

What does F72 mean?

This Manual Fault occurs when the External AC Contactor or a latching relay within the Battery Control System (BCS) is not in its expected commanded state. This signifies a failure in the external AC power path control, impacting power flow.

Complete Troubleshooting Guide

1. 1

   Check why the state of the External AC contactor or latching relay within the BCS doesn't match the commanded state.

2. 2

   Verify that the AC contactor or BCS has power.

3. 3

   For Contactor: Check for fusing of coil, damaged or broken wiring and connections, and damaged inverter aux port.

4. 4

   For BCS: Check for broken (welded) contactor/relay, damaged or broken wiring and connections, and damaged inverter aux port.