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Replacement of Main Units
TD831077
VII - 7
7
1. Compressors
5.
Braze with copper.
6.
Close valve V9 and open valve V6 and inspect for leaks. (Keep the pressure within the 1.27 to 1.47 MPa (13-15 kg/cm
2
)
range in order to protect the low-pressure switch.) (Ref. Fig. A)
Under no circumstances do not exceed pressure 1.47 MPa (15 kg/cm
2
).
When the refrigerant has been recovered in the PC unit, inspect for leaks using a refrigerant gas
pressure of 0.98 MPa (10 kg/cm
2
).
7.
If no leaks are found, close valve V6 and open valve V9, and prepare for establishing a vacuum. Mount the parts
which were removed at the previous stage. (Ref. Fig. A)
If the power cable was disconnected, perform the work in such a way that the power supply area
screws will not become loose.
(3) Replacing the scroll (SC) compressor (PC unit) (Ref. Fig. 3, 4)
NOTE
NOTE
[Removal]
* Refer to “(1) Replacing the PC compressor” on page
5 to remove this compressor before following the
steps in the procedure below.
1.
Remove the front left side fan guard.
2.
Remove the fan.
3.
Remove the outer rear panel.
4.
Remove the part of the compressor cover.
¶
Left rear side panel, low-pressure switch.
* Remove the rear service panel of the compres-
sor cover.
* Proceed with the work inside the fan nozzle
area.
5.
Remove the sound-proofing material which is
wrapped around the compressor.
6.
Remove the cap over the compressor terminal
section, and disconnect the power and internal
terminals.
7.
Remove the crankcase heater.
8.
Disconnect the oil sensor lead wires from the PCB.
9.
Draw out the discharge sensor at the top of the
compressor.
(Draw out the resin stopper.)
10. Remove the bolts and nut with washer.
1870_M_I
Left rear
side panel
Left side panel
1871_M_I
Crankcase heater
Bolts (
×
3)
Discharge pipe
Welded areas
Suction pipe
Nut with washer
Discharge sensor
Power terminal
Internal terminal
Flares
Oil sensor
Fig. 3
Fig. 4