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System maintenance
WARNING
All routine and extraordinary maintenance activities on the machine must be carried out solely by qualified personnel who
is personally familiar with the apparatus, with its functioning, with the correct servicing procedures and who know all the
safety requirements and are aware of the dangers.
WARNING
It 's absolutely forbidden to remove all the protections of the moving parts of the unit
WARNING
The causes of repeated shutdowns deriving from triggering of safety devices must be investigated and put right.
Only resetting the alarm can heavily damage the unit.
WARNING
A correct refrigerant and oil charge is essential for optimal operation of the machine and for environmental protection.
Any oil and refrigerant recovery must conform to legislation in force.
General
IMPORTANT
Besides the checks suggested in the routine maintenance program, it is recommended to schedule periodical inspections
by qualified personnel according to as follows:
4 inspections per year (1 every 3 months) for units running about 365 days per year;
2 inspections per year (1 at seasonal start-up and the second one in the middle of the season) for units running about
180 days per year with seasonal operation.
It is important that during initial startup and periodically during operation, routine verifications a nd checks are performed.
These must also include verification of intake and condensation pressure and the glass pilot lamp place on the liquid line.
Verify through the on-board microprocessor that the machine operates within the normal overheating and unde rcooling
parameter. A recommended routine maintenance programme is shown at the end of this chapter while a form for
collecting operation data can be found at the end of this manual. Weekly recording of all the machine’s operating
parameters is recommended. Collecting this data will be very useful to the technicians in the event that technical
assistance is called for.
Compressor maintenance
IMPORTANT
Since the compressor is of the semi-hermetic type, it requires no scheduled maintenance. However, for granting the
highest levels of performance and efficiency and for preventing malfunctions, it is recommended, about every 10.000
running hours, a visual check about wear status of the satellites and mating tolerances for the main screw and the
satellite.
Such inspection has to be carried out by qualified and trained personnel.
The analysis of vibrations is a good method for verifying the mechanical conditions of the compressor.
Verification of vibration readings immediately after startup and periodically on an annual basis is recommended. The
compressor load will need to be similar to the previous measurement’s load to ensure measurement reliability.
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