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Pump Down
The object of pump down
You can reduce as much refrigerant leakage as possible during product movement or repair by collecting the refrigerant
to the outdoor unit.
Caution for pump down procedure
The amount of refrigerant that can be put into an outdoor unit is limited due to the slim shape of the outdoor unit.
Before performing pump down, most of the refrigerant should be put into an empty container at first. The maximum
amount of refrigerant that can be put into the outdoor unit is 5kg(176.4 oz).
When the amount of system refrigerant exceeds the amount of maximum receptive capacity, compressor trip or damage
by fire might be caused.
Pump down procedure
Before performing pump down, collect the refrigerant into the empty container.
Turn off the manifold gage.
Turn off the service valve of liquid pipe side.
Press K2 button on the outdoor unit PCB three times. (‘
’ is displayed on outdoor PCB LED.)
When the compressor starts operating, observe low pressure using manifold gage.
When the low pressure goes below 0 MPa(gauge pressure), turn off the service valve at gas side and finish the pump
down operation. (To finish pump down operation, press K2 button one more time or press K3 button one time to be
initiated.)
• When putting refrigerant into the refrigerant container, you must use the exclusive container that can be
recharged. When remodeling normal refrigerant container illegally, explosion might occur.
CAUTION
AM0@@FXMDCH_IM_EN_03408A(1).indd 42 2013-03-04 오후 4:28:27
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