6. Operation and fault handling
Page 38
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– TW-31-E - V1.9 - 06.04.2021
to section 6.5: Listing fault memory and description
F31 Max. time without cleaning
Safety function! (This is to prevent that after manual interruption of the
cooling mode is forgotten, to reactivate it or to start the cleaning after the
milk removal.)
Alarm is activated if after exceeding a temperature set by the TW31 a new
cooling or cleaning mode is not detected within the time [h31].
F32 Max. time without
cooling (starts when washing ends)
Safety function! (designed to ensure that the operator does not forget to
start cooling mode after washing.)
Timer starts as soon as washing mode ends. The alarm is triggered if a
new cooling period or washing cycle is not started within time [h32].
F33 min. cleaning interval
Timer starts after detection of “cleaning finished”. Alarm is activated if
within the time [h33] a new cleaning start is not detected.
F34 Time / date not set
The alarm is triggered if the date and time are lost.
F35 Detergent “empty” alkaline [h35]
Alarm is activated only during the cleaning if the float switch detects “de-
tergent alkaline empty”.
F36 Detergent “empty” acidic [h36]
Alarm is activated only during the cleaning if the float switch detects “de-
tergent acidic empty”.
F38 Exceeding of temperature difference, monitoring sensor
The alarm can function only if the optional monitoring sensor is installed
and parameters set.
The alarm is triggered as soon as the temperatures differ by value [h38].
F39 Battery voltage too low
The alarm is triggered if the battery charge is no longer sufficient.
See also section 8.12.
6.5.3 System alarms
F45 Water in the tank after cleaning end
- washing completed
- level electrode reports water in the cleaning line
-
the red LED “FAULT” flashes
At the end of the draining phase there is still water in the tank.
Possible cause of fault:
- Water valve has not closed / is faulty
- Draining phase set too short
Function is activated in parameter [h10].
