Reference Description
1 Solenoid valve
2 Connector
3 Sensor
4 Bushing
5 Drain receiver
If the controller detects water in the intercooler or aftercooler drain receiver for too long a period, a
shutdown is generated. If water is detected on the integrated dryer drain receiver for too long a period, a
warning is generated.
The level switch is a capacitive sensor which generates a high signal when no water is present. The
solenoid valves of the intercooler and aftercooler/integrated dryer drains are different. The solenoid valve
of the intercooler drain has a high flow but cannot handle high pressures. The solenoid valve on the
aftercooler/integrated dryer drains has less flow but can handle higher pressures. It is not allowed to open
the valves as they can loose their set point. Special attention must be paid to the correct wiring of the
different level switches and solenoid valves.
The output of the level switch can be called up on the screen of the Elektronikon regulator. The reading
does not indicate whether the solenoid valve is open or closed, but indicates whether the level switch is
detecting water in the collector. Since there is a drain opening delay timer, the display on the Elektronikon
can show "Condensate Drain IC Open", while the solenoid valve is still closed. Changes to the
Elektronikon settings are not allowed. The "Always pressurized" bit must be activated on aftercooler and
integrated dryer drains. On the intercooler it is not allowed to activate this bit.
A functionality test is possible through the Elektronikon regulator. By performing this test, all solenoid
valves will be opened for a short time (e.g. 15 seconds). Refer to the Elektronikon chapter for more details.
Instruction book
30 2920 1815 04
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