Replacement Procedure For Inv Compressor, Vrv (Rxyq72M, 96M); Replacement Procedure - Daikin RXYQ72 Serivce Manual

Replacement Procedure for INV Compressor, VRV (RXYQ72M, 96M)

1. Replacement Procedure for INV Compressor,
VRV (RXYQ72M, 96M)
1.1

Replacement Procedure

(1) Collect the refrigerant by using refrigerant recovery
(2) Remove the sound insulator mat covering the faulty
(3) Disconnect the brazing sections of suction pipe and
(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
218
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.)
compressor, and disconnect the power cable from
terminal board of the compressor.
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.
Discharge pipe
INV
compressor
Oil equalizing
pipe
Oil pressure equalizing pipe
Remove
* Check that no oil remains in the oil pressure
equalizing pipe before removing of the cut
pipe.
Replacement Procedure for INV Compressor, VRV
SiUS39-601
Suction pipe
Equalizing seat
Bolts
Cushion
rubber
Brazed section
2. Cut
1. Pinch
Equalizing seat
Fig. 1
Brazed section
Cut section
Fig. 2