Gardner Denver GDD4F Operator's Manual page 14

TROUBLE DISPLAY
IMPORTANT:
The temperature control probe is extremely delicate. Do not remove the probe from its position. In case of any kind of
problem, please contact your local Gardner Denver distributor
Pic.3 drain solenoid valve
Pic.4
Optional: No loss condensate drain (NLD)
Cod. 710.0138.72.00 Rev.10 – 02.2022
POSSIBLE CAUSE
Ice formation in the evaporator.
Clog.
Air flows continuously through the
condensate drainage.
Cleaning of the drain solenoid valve
Filter mesh
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Check the probe; if the trouble persists, replace it.
Check the electronic control board; if the trouble persists,
replace it.
Contact our Service Centre to check the gas charge.
Check if the compressed air inlet/outlet is connected properly.
Check if the connecting tubing is clogged; in case proceed
accordingly.
Check if any valves are closed.
Check the condition of any filter.
Drainage solenoid valve jammed, clean or replace it.
Verify the condensate drainage times set on the electronic control
board (C8 and C9).
Check the signal from the control board: if it is continuous,
replace the control board.
Check the no loss condensate drain; if the trouble persists,
replace it.
Electronic drain discharge NLD is the new discharger applicable to any
compressed air systems. It eliminates the condensate without wasting
compressed air.
Electronic drain discharge starts automatically, without the need of any
adjustment. The condensate discharge occurs to the use of an electronic sensor,
which detects the amount of condensate in the integrated water collecting tank.
The level sensor drives start and duration of the drainage, so preventing any
wasting of compressed air.
At the end of installation, put the system under pressure and push the TEST key
repeatedly to eliminate the air bubbles contained in the discharger inlet fittings.
Please refer to the attached CD of the discharger for complete instructions.
To this discharger will be applied the NLD warranty conditions.
REMEDY
When it is necessary:

Clean the mesh filter of the
condensate drainage system.

Clean the filter mesh.
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