- Be sure to connect the end of the charging hose with the
push pin to the service port.
2. Connect the center hose of the charging set to a vacuum pump.
3. Turn on the power switch of the vacuum pump and make sure
that the needle in the gauge moves from 0 cmHg (0 MPa) to -76
cmHg (-0.1 MPa). Then evacuate the air approximately ten minutes.
4. Close the valve of both the Low and High sides of the charging
set and turn off the vacuum pump. Make sure that the needle in
the gauge does not move after approximately five minutes.
Note: BE SURE TO TAKE THIS PROCEDURE IN ORDER TO AVOID
REFRIGERANT GAS LEAKAGE.
5. Disconnect the charging hose from the vacuum pump and from
the service port of the 3-way valve.
6. Tighten the service port caps of the 3-way valve at torque of 18
N.m with a torque wrench.
7. Remove the valve caps of both of the 2-way valve and 3-way
valve. Position both of the valves to “OPEN” using a hexagonal
wrench (4 mm).
8. Mount valve caps onto the 2-way valve and the 3-way valve.
- Be sure to check for gas leakage.
- If gauge needle does not move from 0 cmHg (0 MPa) to -76 cmHg (-
0.1 MPa), in step 3 above take the following measure:
- If the leak stops when the piping connections are tightened further,
continue working from step 3.
- If the leak does not stop when the connections are retightened,
repair the location of leak.
- Do not release refrigerant during piping work for installation and re-
installation. Take care of the liquid refrigerant, it may cause
frostbite.
10.3.5. CONNECT THE CABLE TO THE OUTDOOR UNIT
1. Remove the control board cover from the unit by loosening the
screw.
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