Endress+Hauser CA76NA, Operating Instructions Manual

Page: 46 / 72

Diagnostics and troubleshooting CA76NA
46 Hauser
10 Diagnostics and troubleshooting
10.1 Diagnostic list
The following table contains a list of the diagnostic messages, causes and remedial
measures. If the recommended measures to troubleshoot the problem are
unsuccessful, contact device support immediately.
Error code Diagnostic
message Cause Measure
E1 C0 Error ! The initial
concentration in the
circuit is greater than
50 ppb Na
+ (only occurs
after a calibration)
‣
Repeat calibration.
‣
Check the MBF channel.
E2 Delta U too large ! ∆U too high
‣
Repeat calibration.
E3 STABW too large ! Standard deviation too
large.
‣
Repeat calibration.
E4 S Na too small ! Slope of the sodium
electrode system
outside the permitted
limits (only occurs after
a calibration)
‣
Check the electrode for damage.
‣
Check the calibration data.
‣
Check the standard solutions.
‣
Repeat calibration.
‣
Replace the electrode if necessary.
E5 S Na too large ! Slope of the sodium
electrode system
outside the permitted
limits (only occurs after
a calibration)
E6 S pH too small ! Slope of the pH
electrode outside the
permitted limits (only
occurs after a
calibration)
E7 S pH too large ! Slope of the pH
electrode outside the
permitted limits (only
occurs after a
calibration)
E10 No Sample! Insufficient flow in the
overflow vessel
‣
Check the flow rate and regulate if
necessary.
‣
Check the feed lines for leaks.
E20 Limit ! Limit value for Na +
concentration exceeded.
‣
Reduce the Na + concentration in the
water
‣
Check the limit value settings.
‣
Check the current measuring
conditions.
E30 No Reagent! Insufficient standard
solution in the supply
vessel
‣
Top up standard solution or replace
bottle containing standard solution.
E31 Cal: No Reagent! Na + standard solution is
empty.
‣
Top up standard solution or replace
bottle containing standard solution.
E32 pH too small! Alkalization bottle is
empty. Hose to
alkalization bottle is
leaking.
pH electrode defective,
not calibrated or
calibrated incorrectly.
Alkalization pump
defective.
‣
Check the level in the bottle
containing alkalization reagent.
‣
Check the gas supply lines for leaks.
‣
Recalibrate the pH electrode or
replace the electrode.
‣
Check the alkalization pump is
functioning correctly.