BUCHI SpeedExtractor E-916 - Manual (Page 85)

8 Troubleshooting
85 SpeedExtractor E-916/E-914 Operation Manual, Version D
8.2 Description of the service menu
The service menu provides direct access to all technical process components such as valves, sen-
sors, pump, lift and fan independent of any extraction method. It is therefore possible to switch valves,
run the pump or move the lift for troubleshooting purposes. In addition instrument information is avail-
able, like operating hours and version of certain components.
To open the service menu proceed as follows:
Go to MENU  SERVICE FUNCTIONS and press the right
arrow.
The following information appears:
Safety advice: The Service Functions allow several operations
without proceeding safety checks.
Press YES to continue.
All available service functions are listed and separately acces-
sible in a submenu. For thorough description of the submenus
see the following sections.
The following table provides an overview of the available submenus, their function and typical usage:
Description of the service menu
Service function Description Typically used for:
Valves
(see 8.2.1) The status of all valves, i.e. solvent valves, media valve, posi-
tion valves and outlet valve are shown in a separate submenu. It
is possible to open or close each valve separately to check their
function. To check whether the valve
is operating or to calibrate
the rotary valves.
Sensors
(see 8.2.2) There are three different types of sensors which are individually
accessible by a submenu. Position switches check the position of
the cell and vial lift, the heating block, the protective shield and the
presence of the collection rack.
Seven (for the E-916) or five (for the E-914) PRESSURE SENSORS
monitor the pump pressure as well as the pressure for each posi-
tion individually. These values are also shown in the main and the
status display.
The temperature of the heating block and the main board is shown
in the TEMPERATURE SENSORS submenu. The heater temperature
is also accessible in main display. To check the safety function
of the position switches
and to get an overview of
pressure and temperature
values.
Pump
(see 8.2.3) The pump submenu makes it possible to run the pump indepen-
dent of any extraction process at flow rates of 1 – 50 mL/min. After service to check its
function.
Flow
(see 8.2.4) With the help of the flow function the back pressure of each
line can easily be checked. A relative comparison of the pres-
sure makes it possible to quickly identify positions with possibly
clogged lines, particle precipitation or capillary deformations. To identify possible clog-
ging of the lines.