Table of Contents
Advertisement
1. Pumping down
Indoor unit
Purge the air
• Procedure
(1) Confirm that both liquid side and gas side
valves are set to the open position.
– Remove the valve stem caps and confirm that
the valve stems are in the raised position.
– Be sure to use a hexagonal wrench to operate
the valve stems.
(2) Operate the unit for 10 to 15 minutes.
(3) Stop operation and wait for 3 minutes, then
connect the charge set to the service port of
the 3-way valve.
– Connect the charge hose to the service port.
(4) Air purging of the charge hose.
– Open the low-pressure valve on the charge set
slightly to air purge from the charge hose.
(5) Set the liquid side valve to the closed
position.
Liquid side
Gas side
Lo
CLOSE
CLOSE
Open
2-Way
valve
Closed
3-Way
valve
(6) Operate the air conditioner in cooling mode
and stop it when the gaug e indicates
1kg/cm
2
g.
(7) Immediately set the 3-way valve to the closed
position.
– Do this quickly so that the gauge ends up
indicating 3 to 5kg/cm
(8) Disconnect the charge set, and mount the 2-
way and 3-way valve's stem nuts and the
service port nut.
– Use torque wrench to tighten the service port
nut to a torque of 1.8 kg.m.
– Be sure to check for gas leakage.
–39–
Outdoor unit
2
g.
Advertisement
Table of Contents
Troubleshooting
