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Error messages/Troubleshooting
LED
Cause
E4
Insufficient LED power, insuf-
ficient light (or hardware er-
ror)
E3
Excessive LED power, ex-
cessive light (or hardware
error)
E2
Measuring fault analysis
E1
Low water level
36
The following errors are displayed for 4 seconds:
Check whether the water is turbid. Strong turbidity can
negatively influence the measurement.
Check whether the measuring chamber/sight glass is
soiled.
The sensor or LED might be damaged.
Check whether the water level is too low.
Check whether the measuring chamber and the LED
fitting have been installed correctly. These elements
can loosen during transport. The measurement is no
longer being carried out correctly.
If necessary, carry out a visual adjustment as de-
scribed in the maintenance instructions for the Tes-
®
tomat
808.
Close the housing cover. The environment is too bright
(sunlight), thus negatively influencing the measure-
ment.
The sensor or LED might be damaged.
If necessary, carry out a visual adjustment as described
in the maintenance instructions for the Testomat
Check whether the indicator bottle is empty.
Does the indicator display match the indicator quantity
in the bottle?
Check the indicator. Only use indicators which we
have approved for use in the Testomat
for other Testomat instruments produce erroneous
measurements or the error, "MST analysis".
Check whether the stirring bar is present and turns.
Check whether the pump supplies indicator.
Check whether the dosing needle is blocked or its O-
ring is damaged. Make sure that the suction and pres-
sure hoses do not draw secondary air. Check the suc-
tion lance. Make sure that no air bubbles are escaping
from the dosing needle.
Make sure the water lines are not leaky.
Are the water lines connected properly?
Are all stop valves in the inlet open?
Ensure there are no foreign particles which caused
blocking.
Very dirty or turbid water can also lead to error E1.
Check the water quality. Use our particulate filter in the
supply line. Clean the filter if necessary.
Remedy
®
808. Indicators
®
808.
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