Labconco FreeZone Plus 4.5 Liter and FreeZone -105 C Cascade Freeze Dry Systems 73870 Series User Manual
Page 35
Product Service 816-333-8811 or 1-800-522-7658
31
C
C
H
H
A
A
P
P
T
T
E
E
R
R
7
7
T
T
R
R
O
O
U
U
B
B
L
L
E
E
S
S
H
H
O
O
O
O
T
T
I
I
N
N
G
G
Refer to the following if your freeze dryer fails to operate properly. If the
suggested corrective actions do not solve your problem, contact Labconco for
additional assistance.
FreeZone Freeze Dry Systems that are clean, dry and without samples
attached should reach a vacuum of 0.133 mBar within 10 minutes and should
achieve an ultimate vacuum of 0.040 mBar within 18 hours when the
refrigeration is operating. If the freeze dryer does not obtain a satisfactory
vacuum, perform the following maintenance tests.
I. Vacuum Pump
First make sure that the vacuum pump operates. If it fails to operate, check
the electrical connections of the freeze dryer to the power source and then
check the electrical connection of the vacuum pump to the freeze dryer. If
the vacuum pump has a power switch, make sure that it is turned on. If the
vacuum is not adequate when the vacuum pump is operating, proceed with
the following steps:
1.
Check the oil and ensure it is clear and clean. If the oil looks cloudy
or has any particulates, replace the pump oil. Sometimes it may be
necessary to flush the pump with clean oil several times. To flush the
pump, run the pump 5 to 10 minutes to allow the oil to warm up.
Drain the oil and refill with clean oil. Repeat as necessary.
2.
Check the oil level in the pump. Ensure it is filled to the correct level.
3.
Check vacuum hose connections from the pump to the freeze dryer
and try running the unit.