Atlas Copco GA 11+ Instruction Book page 21

Instruction book
• When pressed during normal operation, it starts the manual drain test.
• When pressed during an alarm, it resets the control logic.
• By pressing the Test button for at least 5 seconds, the self diagnosis routine will start.
LED explanation
Green and red LED alternating on/off for 6 seconds after switching on.
Drain is powered.
Green LED on
Normal operation, drain is in standby and awaiting condensate.
Green LED blinking
Normal operation, drain valve is open to drain water.
Green LED fading on/off
Water is not flowing in to the drain's tank. If the floater does not reach the upper level for 3
hours, the solenoid is energized for 2 seconds. This cycle is repeated for 5 times (so up to 15
hours). Afterwards, the green light starts fading on/off.
Causes:
Checks:
Solution:
Red LED blinking slowly: cleaning routine 1
The drain's tank is filled and the water cannot be drained or can only be drained very slowly.
In normal operation, the drain gets 20 seconds time to drain all water. If the drain is not
emptied within this time frame, a (first) cleaning routine is activated, alternatively opening and
closing the valve for 2 seconds, during maximum 30 cycles. This routine is started in an
attempt to unblock the drain.
If this first unlock routine is unsuccessful, a second routine will be started.
Causes:
Checks:
Press the test button (T) for at least 5 seconds to reset the drain.
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• No condensate entering the tank.
• Float mounted incorrectly (upside down).
• Is any condensate reaching the drain? Does the water separation take place in the heat
exchanger?
• Is the floater mounted in its correct position, for instance after maintenance?
• Although this LED sign does not indicate any kind of failure, the drain can be reset by
pushing the test button (T) for 5 seconds.
• Filter mesh clogged.
• Not enough pressure on drain.
• Internal problem with the drain.
• Is the filter clean and in good condition?
• Is there a minimum pressure of 0.2 bar (2.8 psi) in the drain?
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