Internal communication timeout

What does E46.3 mean?

Communication between the inverter and the safety option has been interrupted, potentially due to a loose connection or a subcomponent fault within the safety option. This prevents proper safety function and inhibits the output stage, compromising system safety.

• Poor contact or intermittent connection between the safety option card and the inverter's backplane connector.
• Electromagnetic interference (EMI) affecting the internal communication bus within the inverter.
• Failure of an internal component on either the inverter mainboard or the safety option card responsible for bus communication.
• Corrupted firmware on the safety option card or the inverter's main CPU leading to communication protocol errors.
• Transient voltage fluctuations on the internal power rails supplying the communication chips.

Click steps to track your progress.

1. 1

   Remove and carefully re-insert the safety option card, confirming a firm and secure connection.

2. 2

   Inspect the edge connector of the safety option card and the corresponding slot on the inverter for bent pins or debris.

3. 3

   Check for proper grounding and shielding of the inverter cabinet to mitigate potential external EMI.

4. 4

   Monitor internal diagnostic logs of the inverter for other related communication bus errors.

5. 5

   Measure internal power supply voltages (e.g., 5VDC, 3.3VDC) at test points on the inverter's mainboard to ensure stability.