General Description - Atlas Copco GA5 User Manual

User manual
PART 1
ELEKTRONIKON I REGULATOR

1 General description

1.1 Automatic control of the compressor
The regulator 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 regulator stops the compressor whenever possible to reduce
the power consumption and restarts it automatically when the
net pressure decreases.
1.2 Protecting the compressor
Shut-down
If the compressor element outlet temperature exceeds the
programmed shut-down level, the compressor will be stopped.
This will be indicated on display (3). The compressor will
also be stopped in case of overload of drive motor (M1) and,
for air-cooled compressors, also the fan motor (M2).
Shut-down warning
If the compressor element outlet temperature or dewpoint
temperature (Full-Feature compressors) exceeds a programmed
value below the shut-down level, this will also be indicated to
warn the operator before the shut-down level is reached.
Service warning
If the service timer exceeds a programmed value, this will be
indicated on display (3) to warn the operator to carry out some
service actions.
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Control panel
1.3 Automatic restart after voltage failure
For compressors leaving the factory, this function is made
inactive. If desired, the function can be activated. Consult
Atlas Copco.
Warning If activated and provided the module was in the
automatic operation mode, the compressor will
automatically restart if the supply voltage to the
module is restored.
2 Control panel
Ref. Designation
1 Stop button
2 Start button
3 Display
4
12
5
6
Function
Push button to stop
compressor. LED (10) goes out.
The compressor will stop after
running in unloaded condition for
about 30 seconds.
Push button to start
compressor. LED (10) lights up
indicating that the regulator is
operative (in automatic operation).
Indicates the compressor operating
condition, measured values and
programmed parameters.
the
the
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