Labconco CentriVap Centrifugal Concentrators and Cold Traps 74750 Series - Manual (Page 37)

Chapter 7: Troubleshooting
Product Service 1-800-522-7658 33
PROBLEM CAUSE CORRECTIVE ACTION
No vacuum/poor vacuum
(cont.) Ice formed on Cold
Trap lid sealing surface Defrost and wipe dry.
Secondary Trap
Cannister not fitted
properly Tighten all connections to and from the
Secondary Trap Cannister.
Secondary Trap Insert
is spent Replace with new insert.
New Secondary Trap
has moisture in it Run vacuum pump for 24 hours to
remove moisture.
Recovery of condensate in
Cold Trap is less than
normally expected Cold Trap is not ON Check to make sure switch is ON and
condensing unit fan is moving air out
of the rear of the cabinet.
Cold Trap does not cool
down Turn vacuum pump OFF and allow
Cold Trap to cool for at least 30 min. to
reach temperature.
-50°C temperature can be checked with
a solvent thermometer or digital
thermometer.
Frequent oil change needed
in pump Secondary Trap insert
is spent Change insert often.
Cold Trap is not
emptied after each run
and dried Empty the traps (glass or stainless
steel) after each run and replace.
Vacuum too strong for
chemical Use a Secondary Trap insert and
diaphragm pump.
Unit starts and shuts off Latch optical sensor
improperly calibrated Unplug power cord. Wait 10 seconds.
Plug in power cord.