Maintenance Notice
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USER'S MANUAL
For maintenance or scrap, please contact authorized service centers.
Maintenance by unqualified person may cause dangers.
Feed air conditioner with R32 refrigerant, and maintain the air conditioner in strictly
accordance with manufacturer's requirements. The chapter is mainly focused on
special maintenance requirements for appliance with R32 refrigerant. Ask repairer to
read after-sales technical service handbook for detailed information.
Qualification requirements of maintenance personnel
1.
Special training additional to usual refrigerating equipment repair procedures is
required when equipment with flammable refrigerants is affected. In many
countries, this training is carried out by national training organisations that are
accredited to teach the relevant national competency standards that may be set in
legislation. The achieved competence should be documented by a certificate.
2.
The maintenance and repair of the air conditioner must be conducted according to
the method recommended by the manufacturer. If other professionals are needed
to help maintain and repair the equipment, it should be conducted under the
supervision of individuals who have the qualification to repair AC equipped with
flammable refrigerant.
Inspection of the Site
Safety inspection must be taken before maintaining equipment with R32 refrigerant
to make sure the risk of fire is minimized. Check whether the place is well ventilated,
whether anti-static and fire prevention equipment is perfect.
While maintaining the refrigeration system, observe the following precautions before
operating the system.
Operating Procedures
1. General work area :
All maintenance staff and others working in the local area shall be instructed on the
nature of work being carried out. Work in confined spaces shall be avoided. The area
around the workspace shall be sectioned off. Ensure that the conditions within the
area have been made safe by control of flammable material.
2. Checking for presence of refrigerant :
The area shall be checked with an appropriate refrigerant detector prior to and during
work, to ensure the technician is aware of potentially toxic or flammable atmosphe-
res. Ensure that the leak detection equipment being used is suitable for use with all
applicable refrigerants, i.e.non-sparking, adequately sealed or intrinsically safe.
3. Presence of fire extinguisher :
If any hot work is to be conducted on the refrigeration equipment or any associated
parts, appropriate fire extinguishing equipment shall be available to hand. Have a dry
powder or CO2 fire extinguisher adjacent to the charging area.
CAUTION
