02/04/2013
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3 General description
View of the ES 4000 Standard controller
3.1 Introduction
The electronic controller has following functions:
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Controlling the compressor
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Protecting the compressor
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Monitoring components subject to service
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Automatic restart after voltage failure
3.2 Automatic control of the compressor
The controller maintains the net pressure between programmable limits by automatically loading and unloading the
compressor. A number of programmable settings, e.g. the unloading and loading pressures, the minimum stop time and the
maximum number of motor starts are taken into account.
The controller stops the compressor whenever possible to reduce the power consumption and restarts it automatically when
the net pressure decreases. If the expected unloading period is to short, the compressor is kept running to prevent too short
stand-still periods.
3.3 Protecting the compressor
3.3.1 Shut-down
If the compressor element outlet temperature exceeds the programmed shut-down level, the compressor will be stopped.
This will be indicated on the display of the controller. The compressor will also be stopped in case of overload of the drive
motor.
Air-cooled compressors will also be stopped in the event of overload of the fan motor.
Before remedying, consult the Safety precautions in the Instruction book.
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