Metrohm 790 Personal IC - Manual (Page 178)

5.3 Faults and malfunctions
790 Personal IC
169
Malfunction Cause Rectification
Chromatograms
with poor resolu-
tion, change in the
retention times • Deterioration in
separation efficiency of
the IC column
• Regenerate column (see
section 5.1.1) or replace
column
Extreme peak
broadening,
splitting (double
peaks) • Dead volume at the
column ends
• Fill column with glass
beads (∅ ≤ 100 µm) or
replace column
No feed of
regeneration or
rinsing solution
for suppressor • Contact pressure too
low
• Leak in system
• Defective pump tubing
• Contamination of the
filter in the 6.2821.100
Filter unit PEEK
• Counterpressure at
suppressor module too
high
• Adjust contact pressure
(see section 2.9.2)
• Check connections and
make leakproof
• Replace pump tubing (see
section 5.2.9)
• Replace the 6.2821.110
Filter (see section 2.3.5)
• Clean or replace suppres-
sor (see section
5.2.6
…5.2.8)