Allied Telesis 6870 Freezer User Manual


 
Page 24 of 25 SPEX SamplePrep LLC 9.24.07
SECTION 8.0: TROUBLE-SHOOTING GUIDE, PAGE 1 OF 2
PROBLEM CAUSE SOLUTION
1 The unit does not turn on No power Make sure power cord is plugged into
outlet and inlet
2 The unit does not turn on No power Check outlet for power and correct as
required
3 The unit does not turn on Power switch not turned
on
Switch unit on
4 The unit does not turn on Blown fuse Replace fuses
5 The unit does not turn on Blows fuses repeatedly Electrical short (RTF)*
6 Status Screen displays
“STATUS: LID UP”
Safety interlock switch
not engaged
Close the lid and latch
7 Status Screen displays
“STATUS: LID UP”
Lid is not closed
completely
Push the lid closed and latch into place
8 Status Screen displays
“STATUS: LOW LN LEVEL” )
Liquid nitrogen sensor
senses inadequate liquid
nitrogen level
Pour more liquid nitrogen into the tub
9 Coil gets very warm Low liquid nitrogen
levels
Pour more liquid nitrogen into the tub
10 Impactor doesn’t shuttle back
and forth
Water in vial has frozen
impactor
Remove vial and replace vial and
contents with a dry unit or RAP ends
of the vial on counter to free impactor
11 Impactor doesn’t shuttle back
and forth
Impactor is magnetized Remove impactor, turn end-for-end, or
demagnetize impactor and re-insert
12 Impactor doesn’t shuttle back
and forth
Too much sample is in
the vial or sample pieces
are too large
Remove some sample from the vial
and start again
13 Flanged End Plug doesn’t come
off cold vial.
End plug/tube joint too
tight when very cold.
Allow vial to warm up
*RTF=Return to Factory for repair