Cod. 710.0138.72.00 Rev.10
– 02.2022
© Copyright 2022 Gardner Denver - All rights reserved
8
– 11
4. MAINTENANCE, TROUBLESHOOTING AND DECOMMISSIONING
4.1 MAINTENANCE
Attention! Perform pressure test with inert gases only (helium, nitrogen).
Before attempting any maintenance operation, make sure that:
1. No parts of the system are under pressure.
2. No parts of the system are electrically powered.
WEEKLY OR EVERY 40 HOURS OF OPERATION
Verify the temperature on the control panel display is acceptable.
Visually check if the condensate is drained regularly.
Clean the filter mesh of the condensate drain system.
MONTHLY OR EVERY 200 HOURS OF OPERATION
Clean the condenser with compressed air, taking care not to damage the condenser fins..
At the end of the above mentioned operations, check if the dryer is working properly.
Check the condition of any filters installed with the dryer. Replace elements as needed.
YEARLY OR EVERY 2000 HOURS OF OPERATION
Check if the flexible tube used for condensate drainage is damaged and replace it if necessary.
Check if all connecting pipes are properly tightened and fixed.
At the end of the above mentioned operations, check if the dryer is working properly.
EVERY 24 MONTHS OR EVERY 4000 HOURS OF OPERATION (Mod. GDD130-160F)
Replace the fan pressure switch.
In case of replacement of one or more components of the device, disposed it along the eventual
packaging of the replacement part, as reported in the point 4.3.
4.2 TROUBLESHOOTING
NOTE: FOLLOWING BEHAVIORS ARE NORMAL CHARACTERISTIC OF OPERATION AND NOT TROUBLES
Variable speed of the fan. (Mod GDD4-100F)
Display of message ESA and ES2 in case of operation without load or low load.
A 2 minute delay for dryer to start after pressing the on/off switch.
Troubleshooting and eventual control and/or maintenance operations must be performed by qualified
personnel.
For maintaining the refrigerating circuit of the machine, contact a refrigeration engineer.
