Metrohm 835 Titrando - Manual (Page 40)

3.1 Problems
34
Titrando Installation Instructions
Problem Possible cause Measures
The dosing drive is over-
loaded because the flat cock
is blocked.
Switch off the Touch Control or end
PC Control/tiamo. Check whether
the exchange unit can be removed.
If it cannot be removed then check
whether the flat cock can still be
rotated. Move it manually to the
change position by turning it to the
right (see Instructions for Use of
exchange unit). Remove the ex-
change unit and proceed as de-
scribed in the Instructions for Use
in the section "Servicing a blocked
flat cock".
The dosing drive is over-
loaded because the piston is
blocked. The fault is indi-
cated by the software (Touch
Control or PC Control/tiamo).
Switch the control device off and
then on again. The dosing device is
initialized when switching on. Re-
move the exchange unit and clean
it as described in the Instructions
for Use in the section "Care and
maintenance". Contact Metrohm
Service if it is not possible to re-
move the exchange unit.
Titrando with internal
dosing drive only:
"Status" LED blinks
rapidly.
The exchange unit data can
no longer be read as the
data chip has been dam-
aged mechanically or by
chemicals.
Have the data chip replaced by
Metrohm Service personnel.
In order to be able to use the ex-
change unit until the data chip is
replaced you can remove the data
chip yourself. The cylinder volume
will still be recognized automati-
cally, but data can no longer be
read from or stored in the ex-
change unit.