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English
2.  Servicing
2-1.  Service personnel
• 
The system is inspected, regularly 
supervised and maintained by 
a trained and certifi ed service 
personnel who is employed by the 
person user or party responsible.
• 
Ensure the actual refrigerant 
charge size is in accordance with 
the room size within which the 
refrigerant containing parts are 
installed.
• 
Ensure refrigerant charge not to 
leak.
• 
Any qualifi ed person who is 
involved with working on or 
breaking into a refrigerant circuit 
should hold a current valid 
certifi cate from an industry-
accredited assessment authority, 
which authorizes their competence 
to handle refrigerants safely in 
accordance with an industry 
recognised assessment 
specifi cation.
• 
Servicing shall only be performed 
as recommended by the equipment 
manufacturer. Maintenance and 
repair requiring the assistance of 
other skilled personnel shall be 
carried out under the supervision of 
the person competent in the use of 
fl ammable refrigerants.
• 
Servicing shall be performed 
only as recommended by the 
manufacturer.
2-2.  Work
• 
Prior to beginning work on 
systems containing fl ammable 
refrigerants, safety checks are 
necessary to ensure that the risk 
of ignition is minimised. For repair 
to the refrigerating system, the 
precautions in #2-2 to #2-8 must 
be followed before conducting 
work on the system.
• 
Work shall be undertaken under 
a controlled procedure so as to 
minimize the risk of a fl ammable 
gas or vapour being present while 
the work is being performed.
• 
All maintenance staff and others 
working in the local area shall be 
instructed and supervised on the 
nature of work being carried out.
• 
Avoid working in confi ned spaces. 
Always ensure away from source, 
at least 2 meter of safety distance, 
or zoning of free space area of at 
least 2 meter in radius.
• 
Wear appropriate protective 
equipment, including respiratory 
protection, as conditions warrant.
• 
Ensure that the conditions within 
the area have been made safe 
by limit of use of any fl ammable 
material. Keep all sources of 
ignition and hot metal surfaces 
away.
Safety precautions