Daikin SkyAir Super Inverter 70 D Series, Service Manual

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Field Piping and Wiring SiE25-110
36 Field Piping and Wiring
(4) Precautions for pumping-down operation
(When moving and remounting the indoor or outdoor units, etc.)
Turn on the power and enter pump-down operation using the following procedure.
This is the end of pumping-down operation. After pumping-down oper-
ation, the remote controller shows “U4” even when ON button on the remote controller is pressed, and it will
not operate. Turn off the main power supply switch and turn it on again in need of operation.
To all persons doing pipe work.
Be sure to open the shut-off valve after finishing pipe work. (Operating the unit with it closed will cause the
compressor to break.)
Procedure Precautions
1
Start fan operation with the
remote controller.
Confirm that stop valves both on
the liquid and gas side are open.
Take care when the procedure 2
is done first because the indoor
unit fan may operate automati-
cally.
2
Push the pumping down but-
ton on the PC board of the out-
door unit.
Compressor and outdoor fan will
start operation automatically.
3
Once operation stops after about 3 or 5 minutes, close the shut-
off valves for the gas and liquid sides. (Refer to Fig. 11)
BS1
BS1
BS1
When running pump-down operation, turn off the power and protect the terminal block to prevent it
from coming into contact with the insulating sheet, as shown in the figure.
Pump-down
push switch
Pump-down
push switch
Terminal block
Top plate
PC-board (A3P)
Vinyl or other insulation sheet
(secure with tape)
Figure of front side of outdoor unit (PC-board (A3P) vicinity)
Pressing the pump-down push switch on the outdoor PC-board (A3P) may cause the indoor fan to
automatically start spinning, so use caution.
71 TYPE
100, 125, 140
TYPE
Switch box
Closing direction
(Liquid pipe)
Fig. 11
(Gas pipe)
(S2536)