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General Functionality
ESIE05-03
2–18
Part 2 – Functional Description
3
1
2
4
5
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
Summary of Contents for RZQ100B7W1B
Page 1: ...Service Manual ESIE05 03 RZQ71 125B8V3B RZQ100 140B7W1B Sky Air Inverter R 410A B series...
Page 2: ......
Page 10: ...ESIE05 03 viii Table of Contents 3 1 4 5...
Page 24: ...ESIE05 03 1 2 Part 1 System Outline 3 1 1 5...
Page 32: ...General Outline Outdoor Units ESIE05 03 1 10 Part 1 System Outline 3 1 1 4 5...
Page 42: ...Specifications ESIE05 03 1 20 Part 1 System Outline 3 1 1 4 5...
Page 56: ...Functional Diagrams ESIE05 03 1 34 Part 1 System Outline 3 1 1 4 5...
Page 58: ...ESIE05 03 1 36 Part 1 System Outline...
Page 70: ...Wiring Diagrams ESIE05 03 1 48 Part 1 System Outline 3 1 1 4 5...
Page 84: ...PCB Layout ESIE05 03 1 62 Part 1 System Outline 3 1 1 4 5...
Page 86: ...ESIE05 03 2 2 Part 2 Functional Description 3 1 2 5...
Page 110: ...General Functionality ESIE05 03 2 26 Part 2 Functional Description 3 1 2 4 5...
Page 150: ...ESIE05 03 3 2 Part 3 Troubleshooting 3 1 3 5...
Page 188: ...Troubleshooting ESIE05 03 3 40 Part 3 Troubleshooting 3 1 3 4 5...
Page 264: ...Additional Checks for Troubleshooting ESIE05 03 3 116 Part 3 Troubleshooting 3 1 3 4 5...
Page 266: ...ESIE05 03 4 2 Part 4 Commissioning and Test Run 3 1 4 5...
Page 306: ...ESIE05 03 5 2 Part 5 Disassembly and Maintenance 3 1 5...