Pump Down Procedure; Test Running - Friedrich M24YJ Manual De Instalación

Pump down
This is performed when the unit is relocated or
the refrigerant circuit is serviced.
Pump Down means collecting all refrigerant
into the outdoor unit without the loss of refrig-
erant.
! CAUTION
Be sure to perform Pump Down procedure
in the cooling mode.

Pump Down Procedure

- Connect a low-pressure gauge manifold
hose to the charge port on the gas side serv-
ice valve.
- Open the gas side service valve halfway and
purge the air in the manifold hose using the
refrigerant.
- Close the liquid side service valve(all the
way).
- Turn on the unit's operating switch and start
the cooling operation.
- When the low-pressure gauge reading be-
comes 1 to 0.5kg/cm 2
fully close the gas side valve and then
quickly turn off the unit. Now Pump Down
procedure is completed, and all refrigerant is
collected into the outdoor unit.
G(14.2 to 7.1 P.S.I.G.),

Test Running

- Check that all tubing and wiring are properly
connected.
- Check that the gas and liquid side service
valves are fully open.
Prepare remote controller
Insert batteries before using the remote
control. The battery type used is AAA (1.5 V).
1
Remove the battery cover by pulling it
according to the arrow direction.
2
Insert new batteries making sure that the
(+) and (–) of battery are installed correctly.
3
Reattach the cover by pushing it back in
position.
!
NOTE
• Use 2 AAA(1.5volt) batteries. Do not use
rechargeable batteries.
• Remove the batteries from the remote
controller if the system is not used for a
long time.
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