9 Maintenance
9.1 Maintenance
General recommendations and precautions
Before carrying out any maintenance or corrective activity, read the following recommendations
and safety precautions and proceed accordingly.
• Stop the dryer by pushing the Stop button on the controller.
• Disconnect all pressure sources and vent the internal pressure of the system before
dismantling any pressurized component.
• Use original parts only. Consult the Spare Parts List for part numbers. For preventive
maintenance, dedicated service kits are available.
• Check for correct operation after maintenance.
Filters and valves installed between the compressor, the dryer and the air consumer
may need other maintenance activities than those mentioned below (e.g. draining the
filters and replacing the filter elements). Refer to the appropriate manual for more
information.
Preventive maintenance schedule
Frequency Service plan Activity
Daily Check the display panel for information and service messages.
Every 6 months or
every 4000 hours
of operation (1)
A • Check for damaged wiring or loose connections.
• Check for air leaks.
• Replace the in- and outlet filter cartridges (if installed).
• Replace the blow off silencer.
• Replace regeneration silencer (if installed).
Every year or
every 8000 hours
of operation (1)
B • Service plan A.
• Calibrate/replace pressure dewpoint (PDP) sensor (if installed).
Every five years or
every 40000 hours
(1)
C • Service plan B.
• Replace the desiccant.
• Replace the blow off valve.
• Replace the regeneration angle seat valve (if installed).
• Replace the regeneration solenoid valve (if installed).
Always replace all O-rings, seals and nylon washers that come free
when executing the scheduled maintenance.
(1) whichever comes first
In normal working conditions, the lifetime of the desiccant is approximately 5 years.
It is recommended to have the desiccant cartridges replaced by a qualified service technician,
authorized by the manufacturer.
Reset the service timer after a maintenance intervention.
All spare parts required for scheduled maintenance are included in specific service kits. Consult
the Spare Parts List for part number information.
Instruction book
2920 7111 23 79
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