Error messages/Troubleshooting
34
The individual errors can be displayed via the LEDs E1 to E4.
To do so, simultaneously press key 3 (standby) and key 4 (horn)
for approx. 2 seconds.
The following errors are displayed for 4 seconds:
LED
Cause
Remedy
E4
Insufficient LED power, insuf-
ficient light (or hardware er-
ror)
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.
E3
Excessive LED power, ex-
cessive light (or hardware
error)
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
®
808.
E2
Measuring fault analysis
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
®
808. Indicators
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.
E1
Low water level
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.
