Metrohm 833 IC Liquid Handling Unit User Manual

Page 86

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9 Troubleshooting - maintenance

833 IC Liquid Handling Unit / Instructions for Use 8.833.1003

78

Fault

Cause

Remedy

Suppressor module /
Sample preparation
module
do not switch to
next position

Connection to suppressor
module / sample preparation
module interrupted

Suppressor module/Sample
preparation module dry

Actuator rotor temporarily
blocked






Actuator dirty

Actuator has mechanical fault

Check cable connection from suppressor
module / sample preparation module to
833 IC Liquid Handling Unit and from 833
IC Liquid Handling Unit to 830 IC Interface
/ 819 IC Detector.

Rinse all 3 suppressor units with solution
for at least 10 min.

Switch instrument off and on again.
Activate suppressor with <STEP>. Check
that actuator rotor is in correct position
(see Section 9.2.6.3).
Repeat process 2-3 times, before each
switch to next position with <STEP> wait
at least 10 s.
If the suppressor is blocked again then it
must be cleaned or replaced (see below).

Clean actuator (see Section 9.2.6.2).

Replace actuator (see Section 9.2.6.3).

Unsatisfactory yield for
dialysis

Transfer time not determined
correctly

Dialysis time too short (e.g. at
too low concentration)

Dry or damaged dialysis
membrane

Deposits on dialysis
membrane, recognizable by
discoloration at sample inlet

Unsuitable dialysis membrane

Check optimal transfer time (see Section
7.6.2
).

Check optimal dialysis time (see Section
7.6.3
).

Replace dialysis membrane
(see Section 9.2.7.1).

Replace dialysis membrane
(see Section 9.2.7.1).

Use different dialysis membrane.




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