Instruction manual

STP-200/300/400 Series Instruction Manual
Table 15.3 Troubleshooting While the STP Pump Is Rotating (2/2)
No. Symptom Probable Causes Countermeasures
Referred
Section
Failure of the STP
connection cable.
Inspection is needed.
Contact Service office.
4.4.2 3 Rotor falls
during operation.
Failure of the battery. Inspection is needed.
Contact Service office.
9
10
Failure of the backing
pump.
Check the capacity and
starting state (Use a
pump of 160 L/min or
more for STP-200 or of
240 L/min or more for
STP-300/400).
3.3
16.1
Leakage of the piping
system.
Check the piping system. 3.3.4
If the main composition
is H
2
or H
2
O, perform
baking; if it is other than
H
2
or H
2
O, clean the
inside of the vacuum
equipment
7.1
4 Ultimate
pressure is
insufficient.
Residual molecule.
(If gases remain inside
the STP pump, contact
Service office when it is
needed to be cleaned).
12.4
15-4