Pump Down" Procedure - Samsung AQ18WJWB Service Manual

2-4-3 "Pump down" Procedure

Pump down will be carried out when an evaporator is replaced or when the unit is relocated in another area.
1) Remove the caps from the 2-Way valve and the
3-Way valve.
2) Turn the 3-Way valve clockwise to close and
connect a pressure gauge (low pressure side)
to the service valve, and open the 3-Way valve
again.
3) Set the unit to cool operation mode.
(Check if the compressor is operating.)
4) Turn the 2-Way valve clockwise to close.
5) When the pressure gauge indicates "0" turn the
3-Way valve clockwise to close.
6) Stop operation of the air conditioner.
7) Close the cap of each valve.
Relocation of the air conditioner
• Refer to this procedure when the unit is relocated.
• Carry out the pump down procedure (refer to the details of 'pump down').
• Remove the power cord.
• Disconnect the assembly cable from the indoor and outdoor units.
• Remove the flare nut connecting the indoor unit and the pipe.
• At this time, cover the pipe of the indoor unit and the other pipe using a cap or vinyl plug to avoid foreign
material entering.
• Disconnect the pipe connected to the outdoor unit.
At this time, cover the valve of the outdoor unit and the other pipe using a cap or vinyl plug to avoid foreign
material entering.
• Make sure you do not bend the connection pipes in the middle and store together with the cables.
• Move the indoor and outdoor units to a new location.
• Remove the mounting plate for the indoor unit and move it to a new location.
Samsung Electronics
Operating Instructions & Installation
3-Way Valve
2-Way Valve
11