Metrohm 743 Rancimat - Manual (Page 172)

6.1 Problems ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
164 ￭￭￭￭￭￭￭￭ 743 Rancimat
6 Troubleshooting
6.1 Problems
Problem Cause Remedy
The pump is louder
than normal. The air flow is blocked
somewhere before or after
the pump.
￭ Check dust filter (3- 20 ) and, if necessary,
replace.
￭ Check filter tube (4- 4 ) on the drying flask
cover for blockages and, if necessary, free
with a gentle tap.
￭ Examine FEP tubings (2- 6 ), (3- 13 ),(3- 14 )
and (3- 17 ) for blockages and, if necessary,
replace.
Extra air is sucked in at
somewhere else other than
the dust filter. There is a
leak somewhere in the sys-
tem before the pump.
￭ Check FEP tubings (3- 13 ), (3- 14 ) and
(3- 17 ) for cracks, kinks etc. and tighten. If
necessary, replace.
￭ Place the drying flask cover (3- 10 ) correctly
on the drying flask and screw tight.
No air flow can be
detected in the reac-
tion vessel (it does
not bubble),
although the pump
is running. The air supply is blocked.
￭ Remove FEP tubing (5- 1 ) from the thread
adapter (5- 3 ). A slight air flow must be dis-
cerned here. If this is not the case, please
contact Metrohm Service.
￭ Check FEP tubing (2- 6 ) for blockages. If
necessary, clean or replace.
￭ Check thread adapter (5- 3 ) and air tube
(5- 5 ) on the reaction vessel cover for
blockages. If necessary, clean or replace.
The FEP tubing for the air
supply is defective. Check FEP tubing (2- 6 ) for cracks, kinks etc. If
necessary, replace.
The FEP tubing for the air
supply is not connected
correctly. Tighten FEP tubing (2- 6 ) on both sides.
The air tube (5- 5 ) does not
immerse in the sample.
￭ Push reaction vessel cover (5- 8 ) down as
far as the limit stop.
￭ Use more sample.