You won't be able to do this in Kibana with the current data model. The slices in a pie chart are based on buckets that contain different documents, not different values from the same document. You could do this with a different data model though.
Instead of putting all 4 count types in a single document, try creating a doc for each one. Imagine a document with the following fields:
A single document might look like this:
Now in your pie chart configuration you can create buckets with a terms aggregation on the
alarmType field and configure a Top Hit metric on the
count field. This will give you a pie chart where the slices are proportional to the latest count of each alarm type.
Here's an example visualization configuration using a terms agg and a top hit metric.