Flaktwood s r134a chiller fault


thermal cut out circuit 1
when i get to site it has been reset and running.
running pressures & temperatures @100%
suction 2.2bar @ 10°c superheat 7.5°c
discharge 10 bar @ 70°c
liquid 34°c subcooling 9°
Sight glass clear
Oil level in screw compressor halfway.
today i swapped motor protector over to see if it was that what was faulty.
all 12 x condenser fan motors running.

any help guys would be great as not getting much joy from flaktwoods.