Hach BioTector B3500C User Manual page 140

Online toc analyzer
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109_HI MPU TEMP
Temperature on the Micro Processor
Unit (MPU) has been exceptionally high
and has exceeded 70°C.
Check the filters in the fan and
vent.
Check the operation of the fan.
(Note that at temperatures below
25°C, BioTector automatically
switches the fan off to stabilize system
temperature using its own internal
heat.)
Check ambient temperature,
which should be less than 45°C.
Confirm that the Analyzer is not
exposed to direct sun light.
If the problem is not related to
above, contact the distributor or
the manufacturer.
Page 140

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