Metrohm 859 Titrotherm - Manual (Page 29)

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859 Titrotherm ￭￭￭￭￭￭￭￭ 21
5 Troubleshooting
5.1 Problems
Problem Cause Remedy
LED "On" is not illu-
minated although
the instrument is
connected to the
mains. The computer has not been
switched on yet or the
plugs are not correctly
plugged in. Check the plug connections and switch on the
computer.
LED "Status" is
flashing fast. The data of the dosing unit
cannot be read because
the data chip has been
damaged mechanically or
by chemicals. Have the data chip replaced by the Metrohm
Service. Until the data chip is being replaced
you can remove the data chip yourself in order
to be able to still use the dosing unit. The cyl-
inder volume is automatically recognized nev-
ertheless, but no data can be read from the
dosing unit or be saved on it anymore.
The dosing drive is overloa-
ded because the piston or
the valve disc is jammed. Exit tiamo™ and then restart it. The dosing
device will be initialized at this time. If the
error is not rectified by these actions, attempt
to remove the dosing drive.
If this is not possible, proceed as follows:
1. Exit tiamo™.
2. Press the locking button of the dosing unit
and remove the distributor. Turn it upside
down in its entirety.
3. Start tiamo™ and initiate 'Filling' in the
manual control. If the rotation of the stop-
cock is clearly audible, then the dosing
unit, with Dosino attached, can be reat-
tached to the distributor.
4. Place the dosing unit with Dosino attached
upright on the distributor, align marking rib
to marking rib, and rotate the dosing unit
to the left until the spring clip snaps audibly
into place. Now you should be able to
remove the Dosino from the dosing unit.