MAzak QT20N - Thermal Trip

As is always the way started up our QT20N This afternoon to run a quick job and non of the hydraulics came on. the screen showed a 200 alarm - Thermal Trip (Emergency Stop) Some how I don't think it is a thermal issue as the machine has been cold for a couple of days.

Looking at the diagnostics page I get a couple of other alarms, are these an off shoot of the thermal alarm or causing the thermal alarm?




I have gone round all the breakers and reset them all but still the same issue.

What the book says:

200: Thermal relay for hydraulic unit head lubricating oil feed motor inside electric control panel has tripped.
204: Alarm had occurred in spindle controller
241: Cooling/chip conveyor motor thermal relay inside electric control panel has tripped. )Does this run on the same trip as 200?)

Have you checked the fault led's on the the freqrol drive?

Could it be a phase loss into the machine?
That would trig an alarm on the freqrol and make the automatic fuse the hydraulic trip.

Thank you, benganboll your a genius! Traced the main incoming phases and one had come lose on an inner terminal,clamped it back up and off she ran.

for the record
"thermal trip" in Mazak speak is a tripped overload on a motor contactor.
alarms are top to bottom in importance.
a loose or missing phase will overdraw current on one leg which will trip an overload.