1. Communication wire disconnected.
2. Faulty Sola controller or display.
1. If the Display is not blank, but is displaying “Boiler Search, Modbus address: 1,2,3…” indefinitely, ensure the Molex connector, located behind the display at the top, is connected and that the wires are fully inserted. If the connector appears to be fine, check the wiring connections on the back of the display; trace wiring back to boiler controller (Sola).
2. If wiring and connections are correct, replace display, then Sola controller.
