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break under the weight, spilling refrigerant and possibly causing serious burns.
When servicing the appliance, the composition and state of the heat transfer fluid must be checked, as
well as the absence of any traces of refrigerant.
During the annual appliance sealing test in accordance with applicable legislation, the high and low
pressure switches must be checked to ensure that they are securely fastened to the refrigerant circuit
and that they cut off the electrical circuit when tripped.
During maintenance work, ensure there are no traces of corrosion or oil around the cooling components.
Before beginning work on the cooling circuit, stop the appliance and wait for a few minutes before fitting
the temperature and pressure sensors. Some elements such as the compressor and piping may reach
temperatures in excess of 100°C and high pressures with the consequent risk of severe burns.
Do not braze or weld the pipe if there is refrigerant inside machine. Please do not charge the gas when in
a confined space.
MAINTENANCE : WARNINGS CONCERNING APPLIANCES CONTAINING R32 REFRIGERANT
Area check
Before starting work on systems containing flammable refrigerants, safety checks must be carried out to
guarantee a minimal ignition risk.
Work procedure
The work must be carried out according to a controlled procedure in order to reduce the risks of releasing
a flammable gas or vapour while working.
General work area
All maintenance staff and other personnel working in the surrounding area must be made aware of the
work carried out. Work conducted in enclosed areas must be avoided.
Check for the presence of refrigerant
The area must be analysed using a suitable refrigerant detector before and during work so that the
technician is informed of the presence of a potentially toxic or flammable atmosphere. Check that the
leak detection equipment used is suitable for use with all refrigerants concerned, i.e. that it does not
cause a spark, is correctly isolated or is entirely safe.
Check for the presence of a fire extinguisher
If work must be carried out on the cooling equipment or any part associated therewith at a certain
temperature, suitable fire extinguishing means must be within reach. Place a dry chemical fire
extinguisher or CO
No source of ignition
No person carrying out work on a cooling system involving exposing the piping may use any ignition source,
which could create a fire or explosion risk. All possible ignition sources, in particular cigarettes, must not
enter within a sufficient perimeter of the installation, repair, removal or disposal site, in the event that
refrigerant could be released into the surrounding space. Before starting the work, the area around the
equipment must be examined to check for all fire or ignition risks. "No smoking" signs must be
displayed.
Area ventilation
Before accessing the unit in any manner whatsoever with the intention of performing any maintenance
task, check that the area is open and well-ventilated. Suitable ventilation must be provided throughout
the maintenance task to allow any refrigerant that could be released into the atmosphere to be safely
dispersed.
fire extinguisher near the work area.
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