Metrohm 700 Dosino - Manual (Page 41)

3.4 Troubleshooting / Problems
700 Dosino, Instructions for Use
35
Housing cannot be closed
Possible cause:
• Spring clip inserted wrongly.
⇒ Remove housing and position spring clip correctly.
Dosing cylinder does not fit in centering tube.
Possible cause:
• Dosing cylinder jammed or tilted on cylinder base.
⇒ Dismantle cylinder and use tool to reassemble correctly.
Drying tube jammed.
⇒ Use your thumb or ball of thumb to press strongly on the ro-
tary axis of the drying tube and simultaneously turn the tube
counterclockwise carefully until the screw nipple becomes
loose.
3.4.3 Dosing drive
Drive carrier rotates continuously.
Possible cause:
• Dosino electronics damaged.
⇒ Send the dosing drive to your local Metrohm service center for
repair.
Dosino becomes hot.
Possible cause:
• Dosing drive is overloaded: 4-way valve or dosing piston is
blocked.
⇒ Switch off instrument immediately.
⇒ Dismantle dosing drive (please observe the information given
on page 31) and clean all the components. Replace any faulty
parts. See page 13ff.
3.4.4 Dosing
Reagent dosed from incorrect port
Possible cause:
• Control instrument configuration is wrong or incorrect pa-
rameters have been defined for the dosing unit.
⇒ Correct the settings; please refer to the ‘Instructions for Use’
of the control instrument.