3 faults and malfunctions, 1 error messages, 2 malfunctions and their rectification – Metrohm 861 Advanced Compact IC User Manual

Page 92: Faults and malfunctions, Error messages, Malfunctions and their rectification

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4 Notes - Maintenance - Faults

861 Advanced Compact IC / Instructions for Use 8.861.1033

82

4.3 Faults

and

malfunctions

4.3.1 Error

messages

If any type of malfunction occurs during operation of the 861 Advanced

Compact IC, this is shown by error messages in the PC program, which

appear either in an error window or in the

SYSTEM STATE

window.

Follow the instructions listed in the Error window and close this win-

dow with

<OK>

.

You will find further details of the error messages of the

SYSTEM STATE

window, their possible causes and the procedure for rectifying them in

the Software Instructions for Use «IC Net 2.3» Section 4.5.

4.3.2

Malfunctions and their rectification

If difficulties appear with The 861 Advanced Compact IC during analy-

ses, their causes are best investigated in the order separating column

high-pressure pump

eluent

connections. Several of The

malfunctions which may appear are listed in the following table with de-

tails of possible causes and countermeasures.

Malfunction

Cause

Rectification

Baseline with high
noise level, pulsa-
tion

Contaminated pump
valves

Defective piston seals

Clean the valves (see Sec-
tion 4.2.6
)

Replace the piston seals
(see Section 4.2.6)

Drift of the
baseline

Thermal equilibrium not
yet reached

Leak in system

Evaporation of organic
solvent in eluent

Condition system with
heating switched on

Check connections and
make leakproof

Ensure better closure of
eluent supply vessel

Considerable
pressure drop

Leak in system

Check connections and
make leakproof

Considerable
pressure rise

Contamination of the fil-
ter in the 6.2821.120 Fil-
ter unit PEEK

Blockage of the precol-
umn

Change of column pack-
ing by injection of con-
taminated samples

Replace the 6.2821.130
Filter (see Section 2.3.6)

Change precolumn (see
Section 4.2.5)

Regenerate column (see
Section 4.1.1) or replace
column (see Section 4.2.5)

Note:
Samples should always
be microfiltered.

Chromatograms
with poor resolu-
tion, change in the
retention times

Deterioration in separa-
tion efficiency of the IC
column

Regenerate column (see
Section 4.1.1) or replace
column

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