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  1. #1
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    Apr 2018
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    2

    Thermal problems

    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???

  2. #2
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    Apr 2011
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    464

    Re: Thermal problems

    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.

  3. #3
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    Apr 2018
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    2

    Re: Thermal problems

    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.

  4. #4
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    Jul 2017
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    29

    Re: Thermal problems

    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.

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