Service Manual

 Maintenance 4 
2. Refrigerant Recharge
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Procedure:
1. Close both 2- and 3-way valves.
2. Slightly connect the Handle Lo charge hose to the
3-way service port.
3. Connect the charge hose to the valve at the bottom
of the cylinder.
4. If the refrigerant is R410A/R32, invert the cylinder to
ensure a complete liquid charge.
5. Open the valve at the bottom of the cylinder for 5
seconds to purge the air in the charge hose, then fully
tighten the charge hose with push pin Handle Lo to
the service port of 3-way valve..
6. Place the charging cylinder onto an electronic scale
and record the starting weight.
7. Fully open the Handle Lo manifold valve, 2- and
3-way valves.
8. Operate the air conditioner in cooling mode to charge
the system with liquid refrigerant.
9. When the electronic scale displays the correctweight
(refer to the gauge and the pressure of thelow side to
confirm, the value of pressure refers tochapter
Appendix), turn off the air conditioner, then
disconnect the charge hose from the 3-way service
port immediately..
10. Mount the caps of service port and 2- and 3-way
valves.
11. Use a torque wrench to tighten the caps to a torque
of 18 N.m. / 13.3 ft-lb
12. Check for gas leakage.