Atlas Copco GA 11+, Instruction Book

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Red LED blinking fast
If cleaning routine 1 is completed (after 30 cycles) but still unsuccessful, cleaning routine 2 is
activated. This routine will open (3 sec) and close (60 sec) the drain’s valve until a floater is in
lower position, so the water is completely drained.
Meanwhile, the
external alarm signal is activated .
Causes:
• Filter mesh clogged.
• Not enough pressure on drain.
• Internal problem with the drain.
Checks:
• Is the filter clean and in good condition?
• Is there a minimum pressure of 0.2 bar (2.8 psi) in the drain?
From this point onwards, the drain will remain in this routine, even after restart. Press the test
button (T) for at least 5 seconds to reset the drain.
Red LED on
An irreversible error occurred. Replace the drain and keep the failed one for further analysis.
2.4 Regulating system
Load/unload regulating system
Regulating system (loaded condition)
Loading
When the net pressure is below the loading pressure, solenoid valve (Y1) is energised. Results:
• The space above unloading valve/blow-off valve (UV) is connected with the oil separator
tank pressure (1) via the solenoid valve.
• Unloading valve/blow-off valve (UV) moves downwards, closing off the connection to
channels (2) and (3).
Instruction book
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