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Refrigeration equipment check
The manufacturer's recommendations in terms of care and maintenance must always be complied with.
When replacing electric components, check that components used are of the same type and category
as those recommended/approved by the manufacturer. When in doubt, contact the manufacturer's
technical department for assistance.
The following checks must be applied to installations using flammable refrigerants:
-the markings on the equipment must remain visible and legible; any illegible markings or signs must be
rectified;
-the hoses or components of the cooling circuit are installed in a position where they are unlikely to be
exposed to any substance capable of corroding the components containing refrigerant, unless the
components are made from materials that are typically corrosion-proof or correctly protected from such
corrosion.
Electric component check
The repair and maintenance of electric components must include initial safety checks and component
inspection procedures. If a defect capable of jeopardising safety arises, no power supply must be
connected to the circuit until the problem has been completely resolved. If the defect cannot be
rectified immediately and if maintenance work must continue, an appropriate temporary solution must
be found. This must be reported to the equipment's owner so that all persons concerned are made
aware.
The repair and maintenance of electric components must include the following initial safety checks:
-the capacitors are discharged: this must be carried out safely to prevent all risks of ignition;
-no electric component or live wiring is exposed while charging, overhauling or draining the system;
-the system must be grounded at all times.
Repair of insulated components
When repairing insulated components, all power sources must be disconnected from the equipment on
which the work is being carried out before removing the insulating cover, etc. If the equipment must be
powered during maintenance work, a leak detector must continuously monitor for leaks at the most
critical point in order to report any potentially hazardous situation.
Particular attention must be paid to the following points to ensure that, when performing work on the
electric components, the housing is not altered to the point of affecting the protection rating. This
includes damaged wires, an excessive number of connections, terminals that do not comply with the
original specifications, damaged seals, incorrect installation of the cable glands, etc.
Make sure that the appliance is properly fixed.
Make sure that the seals or insulating materials are not deteriorated to the point that they no longer
prevent a flammable atmosphere from penetrating the circuit. Spare parts must be compliant with the
manufacturer's specifications.
Repair of intrinsically safe components
Do not apply any permanent electric capacitance or induction charge to the circuit without checking that
it does not exceed the allowed voltage and intensity for the equipment being used.
Typically safe components are the only types on which work can be carried out in the presence of a
flammable atmosphere when live. The test appliance must fall under a suitable classification.
Only replace components with parts specified by the manufacturer. Other parts could cause the
refrigerant to leak and ignite in the atmosphere.
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