Gree GWC09AA, Installation And Service Manual

Page: 44 / 136

GREE Service Manual GWC09AA / K5NNA6A Page 44
Repair of leaks
System leaks must be immediately repaired by authorised personnel after be-
coming acquainted.
If they cannot be repaired immediately, the refrigerant
charge should be removed from the system until the point at which the leak can
be properly repaired.
Repairs must be done principally using the following procedures:
•
Removing the refrigerant from the system in order to avoid an uncontrolled
discharge.
•
Examine the leak source, determining the reason for the leak and carry
out the proper course of action
•
Repair properly (NO “temporary repairing”)
•
Based on the results of the systems’ examination, suitable measures need
to be identified in order to avoid a recurrent appearance of the leak.
•
Before embarking on the repair, ensure that the refrigerant has been re-
moved and the system flushed with OFDN, especially if brazing is to take
place
•
After each intervention into a refrigeration system (repairing leaks, replac-
ing components, brazing) the system must be subject to a leak test and
following strength test of the system.
Regular
professional
brazing
experience is an
important pre-
condition for the
work with
hydrocarbon
refrigerants!
The use OFDN is
an important
precondition for
professional
leak repair!
1. System flush-
ing from HC
2. Inert gas braz-
ing
3. Leak testing
4. Strength test-
ing
5. Cleaning
(blowing)
agent