Fronius · Perfect Charging
The external start/stop input, which controls the charger's operation, is detected as being in an open state. This condition prevents the charging process from initiating or continuing, as the command to run is not received by the charger.
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Verify the state of the external start/stop switch or button to ensure it is in the closed position (run command active).
Check the continuity of the wiring for the external start/stop circuit from the external control device to the charger's designated input terminals.
Inspect any external relays or contactors involved in the start/stop signal path for proper operation and contact integrity.