Lenntech Testomat 808 Manual De Mantenimiento Y De Servicio página 22

Error correction
NOTE
22
secondary air. Check the suction lance. Make sure that no air
bubbles are escaping from the dosing needle.

Check fuse F3 and replace it. If the fuse continues to trip, replace
the pump motor.
4. Error E1 "Lack of water"
Proposed solution:

Check water hoses for leaks.

Are the water hoses properly connected?

Are all shut-off valves in supply pipes open?

Please ensure that no foreign particles have caused a blockage.

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.
The clear value balancing fails
Under certain conditions and due to cloudiness in the test water, it is
possible that the clear value balancing will not produce a result. To
ensure that the Testomat 808 in this case will not carry out an end-
less number of test measurements, it has been programmed to stop
automatically after 15 failures. Additionally, in this case a red limit
value LED will start to flash.