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General Functionality
SiBE28-804
46
Functional Description
1.11 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
Pressing the pump down switch (BS1) on the outdoor PCB may cause the outdoor and
indoor fan to start operating automatically.
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
minutes) 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 switching
OFF the power supply first.
Make sure the stop valves are opened
before restarting the unit.
Summary of Contents for FHQ100BUV1B x 2
Page 13: ...SiBE28 804 2 ...
Page 19: ...Model Name and Power Supply SiBE28 804 8 General Information ...
Page 29: ...Specifications SiBE28 804 18 Specifications ...
Page 33: ...Wired Remote Controller SiBE28 804 22 Remote Controller 1 2 Installation ...
Page 34: ...SiBE28 804 Wired Remote Controller Remote Controller 23 ...
Page 93: ...Outdoor Unit Fan Speed Control SiBE28 804 82 Functional Description ...
Page 131: ...Test Run and Operation Data SiBE28 804 120 Test Operation ...
Page 251: ...Troubleshooting by Remote Controller Display LED Display SiBE28 804 240 Troubleshooting ...
Page 277: ...PCB Layout SiBE28 804 266 Appendix ...
Page 297: ...RZQ100 140C7 RZQS125 140C7V1B SiBE28 804 286 Removal Procedure ...
Page 311: ...SiBE28 804 iv Index ...