Internal board fault

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This internal board fault trips the inverter when there is an incorrect combination or mismatch between the control board and the main circuit board. This indicates a serious hardware incompatibility or assembly error. The inverter cannot operate safely under these conditions.

• Control circuit board installed is not compatible with the main power circuit board (e.g., different generations or power ratings).
• Incorrect firmware loaded onto the control board for the specific main circuit hardware configuration.
• Loose or damaged connection ribbon cable between the control board and the main power board.
• Internal component failure on either the control board or main power board causing an incompatibility detection.

Klicken Sie auf Schritte, um Ihren Fortschritt zu verfolgen.

1. 1

   Verify part numbers and serial numbers of both the control board and the main power board against inverter documentation for compatibility.

2. 2

   Power down the inverter, then physically disconnect and reconnect the ribbon cable(s) that link the control board to the main power board.

3. 3

   Check for any bent pins or damage on the connectors of the ribbon cables and the board interfaces.

4. 4

   Confirm that the firmware version on the control board is the correct one for the installed main power section.

5. 5

   Measure resistance between communication lines on the ribbon cable to identify any broken traces or short circuits.