Trouble-Shooting Guide - SPEX SamplePrep 6875D Operating Manual

9.0 TROUBLE-SHOOTING GUIDE

PROBLEM
The unit does not turn on.
Screen displays
"LID UP".
Screen displays
"LN LEVEL LOW".
Coil gets very warm.
1300-87052-1A, REV 1
POSSIBLE CAUSE
No Power
No Power
Circuit Breaker tripped
Safety interlock switch not
engaged.
Lid is not closed completely.
Liquid nitrogen sensor
detects inadequate liquid
nitrogen level.
Low liquid nitrogen levels.
SPEX SamplePrep LLC
6875D Freezer/Mill
POSSIBLE SOLUTION
Make sure power cord is
plugged into outlet and inlet.
Check outlet for power and
correct as required.
Turn unit OFF then ON.
Call SPEX for service or
repair.
Close the lid and latch,
Push the lid closed and latch
into place.
In Auto Fill mode, check LN
Tank and replace if empty.
Check hose assembly for LN
leaks. In optional Manual Fill
mode, pour more liquid
nitrogen into the tub until
unit "Beeps" indicating
proper LN Level has been
reached.
In Auto Fill mode, check LN
Tank and replace if empty.
Check hose assembly for LN
leaks. In optional Manual Fill
mode, pour more liquid
nitrogen into the tub until
unit "Beeps" indicating
proper LN Level has been
reached.
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