Pump Down Procedure - Samsung AE044MXTPEH Mode D'emploi

Pump down procedure

Objective of Pump Down
For product repairs and indoor unit relocation, pump
down operation must be done recover the refrigerant
into the outdoor unit.
Cautions When Performing Pump Down
• Product limits amount of refrigerant in the outdoor
unit due to slim design.
• Collect the majority of the refrigerant in the system
in an empty refrigerant vessel and perform a pump
down operation with remaining refrigerant. Maximum
amount of refrigerant is 5Kg.
• If the amount of refrigerant exceeds maximum
allowable limit, increased pressure may cause
compressor trip or a burn out.
Pumping down refrigerant
1 Close the manifold gauge.
2 Close the liquid side service valve.
3 Press the K2 button on the outdoor unit PCB three
times. ( will be displayed on outdoor unit PCB LED.)
4 Observe low pressure side using manifold gauge
when the compressor moves.
5 When the pressure on low pressure side decrease
below 0 MPa(0 kgf/cm²) close the gas side
service valve and end the pump down operation.
( To end the pump down operation, press the K2
button once more or press K3 button to reset.)
CAUTION
• Use a transfer cylinder when recovering refrigerant
to be re used. Using modified refrigerant vessel may
cause explosion and cause damage or personal injury.
NOTE
Relocation of the Air to water heat pump
• Refer ₜo this procedure when the unit is relocated.
• Carry out the pump down procedure (refer to the
details of 'pump down').
• Collecting refrigerant may be hard, since multi type
products exceeds allowable charging amount of
refrigerant in the outdoor unit to support long piping.
(Refer to page 43.)
• 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.
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