Samsung ACH2400C Service Manual page 3

1-2 "Pump down" Procedure
Pump down shall be carried out when an evaporator is replaced or when the unit is relocated in another
area.
1. Remove the caps from the two 3-way valves.
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 3-way valve(High pressure side) clockwise to close.
5. When the pressure gauge indicates "0" turn the 3-way
valve(Low pressure side) 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.
1. Carry out the pump down procedure
(refer to the details of 'pump down').
2. Remove the power cord.
3. Disconnect the assembly cable from the
indoor and outdoor units.
4. 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.
2
3-Way Valve (High pressure)
5. 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.
6. Make sure you do not bend the connection
pipes in the middle and store together
with the cables.
7. Move the indoor and outdoor units to a
new locatioon.
8. Remove the mounting plate for the indoor
unit and move it to a new location.
3-Way Valve (Low pressure)