7. Tank monitor and general fault handling
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– WTS-300-E - V4.1 - 20.01.2022
7.5.3 System alarms - cleaning
When a washing cycle has been completed successfully, this is indicated by the
green LED “OK”. A new mode can then be started.
If a
system-critical
fault occurs during a washing cycle:
- the cycle is interrupted, t
he red LED “Fault” flashes, the yellow mode indication
“Wash” remains permanently lit. A code in the display indicates the type of fault.
Press down OFF button for 3 seconds and acknowledge the fault message.
NB: If “Automatic start to cooling” has been set, this will not happen. Cooling
mode must be started manually in this special case.
or
If a
system-noncritical
fault occurs during a washing cycle:
- the cleaning cycle continues to the end, the yellow "Cleaning" mode indicator
remains lit until then.
After the cycle has ended, the controller switches to the OFF mode or, with the
"Autostart cooling" parameterized, to the cooling mode.
A code in the display indicates which error has occurred. This must be acknowl-
edged with the reset button.
F40 Safety switch for butterfly valve
(only if [r10] = 2)
- washing stops
- outlet valve is opened for time [n100]
(during the emptying phase the display alternates between F40 and AbL)
-
the red LED “FAULT” then flashes, with error code F40
During washing the digital input for the tank outlet safety switch [r10] was
triggered.
Possible cause of fault:
- manual butterfly valve on tank outlet was closed..
F41 Pressure switch for cleaning line
- washing stops
- outlet valve is opened for time [n100]
(during the emptying phase the display alternates between F41 and AbL)
-
the red LED “FAULT” then flashes, with error code F41
During cleaning the pressure switch has not recognised pressure for a pe-
riod longer than that set in [r11].
Possible cause of fault:
- leak in washing line
- pressure switch faulty
- air in washing line
- washing pump faulty
F42 Thermal contact for washing pump
- washing stops
- outlet valve is opened for time [n100]
(during the emptying phase the display alternates between F42 and AbL)
-
the red LED “FAULT” then flashes, with error code F42
During washing the thermal contact of the washing pump has triggered (if
parameter set in [r12].
Possible cause of fault:
- Cleaning pump overheated.
3 sec.