4. Electrical connection
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– TW-31-E - V1.9 - 06.04.2021
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The mode of the control of the cooling tank must be known for the function of the
TW-31. The modes are the following:
Cooling mode START
- either by a permanent signal of the external control (uncommon)
- or by the trigger signal -> see next page
-
by “first milk into the tank” - detection - see parameter [h2]
Cooling mode END
- either by the omission of the permanent signal of the external control
(uncommon)
-
or by the detection “start of cleaning”
- or in case of a rise in temperature above 5°C in the tank, without the start of the
compressor
Cleaning mode START
- either by a permanent signal of the external control
-
or by the start signal “cold water valve ON” (trigger function)
Cleaning mode END
- either by omission of the permanent signal of the external control
-
or after end of the settable “minimum period cleaning cycle” [h5]
(example 0.5 hours
– will be extended by 10 minutes [h6], if the agitator function
is detected).
OFF (TANK EMPTY)
is displayed after cleaning mode has been finished.
The tank is empty and can be refilled.
4.4 Error detection (Example)
By means of different input signals or temperature measurement results predefined
errors can be detected and displayed.
Example Error F1 ->
Milk temperature too high too long
Error is displayed if the temperature sensor signals a higher temperature than the
value that has been predefined in the limit value [H1].
Example Error F35 ->
Detergent “empty” alkaline
Error is displayed, if the float switch reports “Container empty”.
A listing of the predefined errors and their causes can be found in section 6.5.
