E16
ABL Load Management / Master-Slave Communication Fault

ABL charger shows E16; charging is disabled and the unit may indicate a load management or master/slave error.

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

Broken RS‑485 or CAN bus cable between ABL chargers, Incorrect master/slave addressing, Termination resistors not set correctly, Faulty load management controller in master unit

How to Fix / Troubleshooting

Context: This applies to ABL installations with multiple chargers in a cluster.

Steps:

  • Check wiring: Inspect the daisy‑chain communication cable between chargers for damage or loose terminals.
  • Verify addressing: Confirm that only one ABL charger is configured as master and others as slaves, with unique addresses as per ABL documentation.
  • Termination: Ensure that bus termination is enabled only at the ends of the communication line, not on every unit.
  • Isolate the fault: Temporarily disconnect segments of the bus to identify which charger or cable run causes E16.

Repair: Replace damaged communication cables or the load management controller board in the master charger if it fails to communicate with otherwise healthy slaves.

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Repair Difficulty

Hard 4/5

Required Part

ABL load management controller
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