The sensor inside coolant distribution block detects the coolant temperature is over 40°C.
a. Confirm the indoor temperature meets the requirement of working environment
(lower than 30°C)
b. Check and clean the air filter in chiller.
c. Check the liquid level, fill-in coolant if the level is low.
d. Take extruder assembly off, and clean water path inside extruder assembly by
compressed air.
e. Replace temperature sensor. (check if the temperature displayed in chiller is close
to 40°C as well)