Replacement Procedure For Inv Compressor; Vrv Ii (Rxyq5M-48M); Replacement Procedure - Daikin R410As Service Manual

Replacement procedure for INV compressor, VRV II (RXYQ5M-48M)
1.

Replacement procedure for INV compressor,

VRV II (RXYQ5M-48M)

1.1

Replacement procedure

(1) Collect the refrigerant by using refrigerant
(2) Remove the sound insulator mat covering the
(3) Disconnect the brazing sections of suction pipe
(4) Pinch the oil pressure equalizing pipe of the faulty
(5) Remove three bolts at cushion rubber section to
(6) Check that no oil remains in the oil pressure
(7) Install the new compressor in the unit.
(8) Remove the rubber caps put on the suction and
(9) Remove the plug put on the equalizing seat of the
(10) Install the outlet pipe on the equalizing seat of the
(11) Braze the equalizing seat outlet pipe to the oil
(12) Braze the suction and discharge pipe with brazing
(13) Conduct air tight test to check the piping system is
(14) Connect power cable to the terminal board of
(15) Conduct vacuum drying.
(16) Charge refrigerant after the completion of vacuum drying, and check the function of
240
recovery unit.
(Since the setting on outdoor unit PCB is required
for refrigerant recovery, refer to the warning plate
"Precautions in service work" attached on the
switch box cover.)
faulty compressor, and disconnect the power
cable from terminal board of the compressor.
and discharge pipe by using brazing torch after
the refrigerant has been collected completely.
compressor at the lower part of the brazed joint as
shown in figure 1, and cut it between the pinched
section and brazed joint in order to prevent
residual oil from discharging.
take out the faulty compressor outside the unit.
equalizing pipe as shown in figure 2, then remove
the cut pipe from the brazed joint with brazing
torch.
(Be sure to insert the cushion rubbers before
tightening the fixing bolts of compressor.)
discharge pipe of the new compressor to release
the sealing nitrogen gas.
(Take note that oil may spout due to the pipe
inside pressure if the plug put on the equalizing
seat is removed before removing of rubber cap.)
new compressor.
new compressor.
pressure equalizing pipe with brazing torch.
* Since an O-ring is put in the equalizing seat, be
sure to maintain the parts around O-ring in cool.
torch to the compressor.
free from leakage.
compressor and cover the compressor with sound
insulator mat.
(Since the setting on outdoor unit PCB is required for vacuum drying, refer to the warning
plate "Precautions in service work" attached on the switch box cover.)
compressor with cooling or heating operation.
Replacement procedure for INV compressor, VRV II (RXYQ5M to 48M)
Suction pipe
Discharge pipe
INV
compressor
Oil equalizing
pipe
Fig. 1
Oil pressure equalizing pipe
Remove
Cut section
* Check that no oil remains in the oil pressure
equalizing pipe before removing of the cut
pipe.
Fig. 2
Si39-302
Equalizing seat
Bolts
Cushion
rubber
Brazed section
2. Cut
1. Pinch
Equalizing seat
Brazed section