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12. Maintenance
12 .1 Checks, inspections and maintenance must be carried out by specialised and authorised personnel .
12 .2 During the operations of maintenance, repair and cleaning, always use personal protective equipment (e.g. gloves
sufficiently resistant to mechanical hazards) to reduce the risk of injury in the event of contact with the sharp edges of the
metal sheets or with the finned pack.
12 .3 Do not perform any operations on the unit before disconnecting the power supply . Disconnect the energies and discharge
them. Set the main switch to the "0-OFF" position and lock it with a padlock; the key must be kept by the maintenance
technician until the work is completed . Wait until all fans have stopped rotating . After disconnecting the power supply, wait
5 minutes before opening the junction boxes on the machine.
12 .4 It is recommended to check, at least once every six months, that the electrical connection, the earthing and the components
subject to the greatest wear (motor fans, switches) are functioning correctly; if worn or obsolete, replace them with new
equivalent components .
12 .5 It is recommended to check, at least once every six months, that all electrical and mechanical parts and circuits affected
by the fluids are in good working order; check the integrity and fastening of the fan protection grille.
12 .6 It is advisable to check, at least once every six months, that the screws are properly tightened (Ref. EN 1090-2).
12 .7 If a fan is OFF for a long period, it should be switched ON for at least 2 hours every month to remove any trace of moisture
inside the motor .
12 .8 Check the cleanliness of the finned pack at least once a month.
12 .9 Clean the surfaces of the finned pack and of the fans at least once every six months.
12 .10 Cleaning of the finned pack:
12 .10 .1 Place the main switch in the "OFF" position and wait until all the fans have stopped rotating. Lower the drain pan (see
Chap . 8) .
12 .10 .2 Use compressed air at a maximum pressure of 10 bar and at a minimum distance of 150 mm, directed perpendicularly
against the finned pack to avoid bending or damage to the fins.
12 .10 .3 Use a jet of water at a max pressure of 50 bar for damp dirt or grease at a minimum distance of 150 mm, directed
perpendicularly against the finned pack, avoiding bends or damage to the fins and pipes. If appropriate add a neutral
detergent (refer to its instructions for use). Rinse and then dry with compressed air as indicated at point 12 .10 .2 . Make
sure that the electrical components are not affected by the jet of water. If necessary, provide adequate coverage.
12 .10 .4 Aspirate possibly from the air inlet side .
12 .10 .5 After having cleaned the finned pack, perform a visual inspection to identify any dirt or the presence of fins that are
damaged (repeat the cleaning operation if necessary).
12 .11 Only use original spare parts . Do not wait until the component is completely worn out, preventive replacements can
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