MultiPlus-II External Transfer Switch application

If the system exhibits strange behaviour, check the following:

• Current sensor orientation: Ensure that the current transformers (CTs) are correctly oriented. The arrow on the CT should point from the grid or generator to the contactor, following the direction indicated in the Wiring diagrams chapter.

• Current sensor connections: Verify that the current sensors are connected to the correct units: L1 to the L1 unit, L2 to the L2 unit, and so on.

• Wiring placement: Ensure the current sensor wires are not routed too close to AC or signal wires.

The inverter/chargers fail to connect to the grid or generator:

• Check whether the AC-In terminals on slave units are wired. They should not be wired.

The system status is unknown, and inverter/chargers are inverting:

• Check whether the AC-In terminals on slave units are wired. They should not be wired.

The inverter/chargers will not switch on, and all charge status LEDS are flashing:

• This indicates a configuration fault. Verify that the current transformer (CT) rating matches the system capacity.

  For example, in a three-phase 12 x 48/15000 MultiPlus-II setup, this fault occurs if the configured CT rating is set to 100A. For such a system, a 400A CT rating is required.

• The programmable relays on L2, L3, and all slave units cannot be used.

• The VictronConnect app cannot be used for system configuration and current sensor settings. Use VEConfigure 3 and VE.Bus System Configurator software instead.