Little bit of info I've found so far, still not sure where to go with this:

This resistor takes the 43 volt DC coil power to the zero-crossing detector circuitry and
normally runs hot. Hence it may eventually go open, so check it if
only 5 flashes from the LED are seen.

Interesting...R113 and R16 are part of the Zero Crossing Detector
circuit and go across the 43VDC and ground...for them to go up in
smoke you have to somehow put a LOT more voltage across them...like
200VDC or so...