Samsung MC18AC2-09 Service Manual page 18

3-2-2(g) Refrigerant Refill
• Refill an air-conditioner with refrigerant when refrigerant has been leaked at installing or using.
1. Vacuum system with pump (for new
installation, leakage).
2. Turn the 3-way valve clockwise to close,
connect the pressure gauge(low pressure
side) to the service valve, and open the
3-way valve again.
3. Connect the tank to refill with Refrigerant
4. Set the unit to Low pressure checking mode.
* Press the ON/OFF switch for 5 second.
* All lamps blink on the indoor unit.
5. Check the pressure indicated by the
pressure gauge(low pressure side).
* Refer to Low pressure graph.
6. Open the refrigerant tank and fill with refrig-
erant until the rated pressure is reached.
* It is recommended not to pour the refriger-
ant in too quickly, but gradually while
operating a pressure valve.
7. Stop operation of the air conditioner.
8. Close the 3-way valve, disconnect the
pressure gauge, and open the 3-way valve
again.
9. Close the cap of each valve.
Samsung Electronics
Operating Instructions and Installation
Compound
gauge
For mounting
other end of
hose when
not in use
R410A
Suspension hook
High
pressure
gauge
Hand
wheel
Finger tight
fittings
Connected to
high pressure
side
Vacuum
pump
3-11