BUCHI Interface I-100 - Manual (Page 31)

BÜCHI Labortechnik AG Help with faults | 8
Operation Manual Interface I­100 31/42
8 Help with faults
8.1 Faults, possible causes and remedies
Fault Possible cause Remedy
Device does not
work Device is not connected to
power supply u Check power supply (see
Chapter 5.2 "Connections",
page 18).
Valve or pump
frequently
switches over System leaking u Check system for leaks (see
Rotavapor operating instruc­
tions).
u If necessary, replace tubing
and/or seals.
Hysteresis setting too small u Select a larger hysteresis
(for terminal vacuums
greater than 700 mbar, set to
automatic hysteresis; see
Chapter 6.2.1 "Manual
mode", page 23).
Valve does not
switch over Valve coil dirty u Contact BUCHI Customer
Service.
Valve lead not plugged in u Plug in valve lead.
Valve not adjusted u Contact BUCHI Customer
Service.
Vacuum is not
achieved Back­evaporation from the re­
ceiving flask u Empty receiving flask (see
Rotavapor operating instruc­
tions).
System leaking u Check system for leaks (see
Rotavapor operating instruc­
tions).
u If necessary, replace tubing
and/or seals.
Water pressure of glass filter
pump too low u Increase water flow (see
pump operating instructions).
Vacuum pump too weak u Use suitably dimensioned
vacuum pump.