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Help needed: %11 BA 0 on startup

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Hi all.

It appears that communication is lost between cabinet and control on my FP2NC.

The FP2NC has been powered up for a couple of weeks without being used, so all batteries are fully charged.

Now the display only shows %11 in the upper line and BA 0 in the lower line. I use %11 as my default program number, so that makes sense.

The drives are not powered up and none of the keys are active.

In the electrical cabinet, F5-8 of the NPP90 are lit, indicating that the control hasn't reported in.

I think that I have seen this before when the battery in the electrical cabinet was defective, however this is not the case this time. Battery voltage is 3.8V, so all 3 cells are ok.

Does anyone have a clue where to search for an error?

Best regards,

Torleif.

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