Daikin RZQ125B7W1B [102/326] Pump down operation

Daikin RZQ140B7W1B [102/326] Pump down operation
General Functionality ESIE05-03
2–18 Part 2 Functional Description
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1.13 Pump Down Operation
Outline Whenever the units need to be moved or removed, perform a pump-down operation before
disconnecting the field piping. By performing a pump-down operation, all of the refrigerant will be
collected in the outdoor unit.
Procedure
Cautions
P Pressing the pump down switch (BS1) on the outdoor PCB may cause the outdoor and indoor fan
to start operating automatically.
P Be sure to open the stop valves after the pipe work has been finished. Be sure not to operate the
unit with closed stop valves, or the compressor may brake down.
Procedure Precautions
1 Start "Fan only operation" from the remote
controller.
Confirm that both the liquid and gas stop
valves are open.
2 Push the pump-down button BS1 on the
outdoor PCB.
Compressor and outdoor fan will start
automatically.
3 Once the operation stops (after 3~5 min-
utes) close the liquid stop valve first and
then the gas stop valve.
After the "Pump Down Operation" has
been finished the wired remote controller
screen may be blank or show "U4" error
indication.It will not be able to start the unit
from the remote controller without switch-
ing OFF the power supply first.
Make sure the stop valves are opened
before restarting the unit.
ESIE05-03.book Page 18 Wednesday, April 6, 2005 4:09 PM

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