Metrohm 833 IC Liquid Handling Unit User Manual
Page 86
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.