If all DIP switches numbered 1-4 are in the "Off" position, the electronics
carry out a self-test. In this case, the compressor and valve are switched on
simultaneously for 1 second, then off for 1 second. This continues until the
voltage supply is interrupted or a DIP switch is switched to "On”.
After manual setting of the cleaning interval, the cover of the electrical
components must be closed again.
5.1.3 Activating the Multi-Timer intermediate cleaning cycle
An additional intermediate cleaning cycle is performed by briefly making
contact between the gray cable and ground (e.g., by pressing a switch in
the cab). The cleaning interval is then automatically reset and starts over.
► If intermediate cleaning is not used, the gray cable should be isolated.
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