Atlas Copco GX 7 Instruction Book page 21

Instruction book
Symbol
Operation of the central control unit
The central control unit is programmed for Energy Saving. It will automatically start and stop the compressor,
depending on the need for compressed air. Before switching off, the compressor will run idle (unloaded). The
idling period decreases when the air consumption decreases, thus reducing idle running to a minimum. See
also Regulating
Reference
1
2
Hm
Gdp
Gpa
S3
2920 7054 00
Led flashing
The oil temperature switch (TSH) has
switched off the motor. The NC contact
is open.
On star/delta started compressors,
during start-up (transitory: star
contactor energized)
-
General alarm
Not enabled
Compressor running unloaded (idle)
before stopping
Compressor ready to start - (Stand-by) Compressor operating
-
To start up again after a protection has been triggered (alarm): press the RESET button,
followed by the START button (1).
The motor will start after a delay of 25 seconds.
system.
Designation
Start button
Stop button
Hour meter
Dew-point gauge
Working pressure
Emergency stop button
Only use emergency stop button (S3) in the event of an emergency.
Led on
The NC contact of the oil temperature switch is
closed again, but the fault is not yet reset.
-
Compressor running loaded
-
Not enabled
-
Main power on
Function
To start or stop the compressor. After the stop command,
the compressor will run unloaded for a period of 120
seconds and then stop.
Indicates the total running time.
Indicates the dew-point temperature.
Not installed on Pack versions
The white pointer indicates the actual working pressure.
The red one indicates the maximum limit.
To stop the compressor immediately; only to be used in
the event of an emergency. Must be unlocked before
starting by pulling it out.
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