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I have a Toyoda FA450 with a Fanuc 16i-MB. I am getting multiple operator alarm codes, one being a Coolant Unit Thermal trip (AL51). the others are Through coolant empty (AL53), Coolant empty (AL48) and a Take up chip conveyer alarm (AL83). Cleaned all coolant tanks and floats and filled. Hydraulics will not start up. Checked all breakers and switches. Anyone have any ideas???
Looks like you may have lost the voltage that feeds the overloads. Check the votage at the overload AUX contacts and see if you have it.
I forgot to mention that there is a spindle chiller on the machine and a Techie seems to think the alarms are related to the chiller not powering up.
Could be a thermal overload tripped inside the chiller unit it's self.
Almost guaranteed to happen if you get a brownout where a phase or two isn't making it into the shop.