2
- 35
1
2
3
4
5
6
7
8
9
2WAY VRF SYSTEM
Outdoor Unit Repair Procedures
2WAY VRF SYSTEM
Outdoor Unit Repair Procedures
(7) Remove the bolts (×3), washer and spacer (rubber spring).
(8) Disconnect the 2 brazed locations shown in the figure below.
Type: 72, 96
Type: 120, 144
Bar
9. Compressor
Fig. 18
Crankcase
heater
Inverter
compressor
Tube-with-
flare-nut
Brazed
locations (2)
High pressure
switch
(Cooling is
necessary.)
Remove the
discharge
thermistor
Remove the
discharge
thermistor
High pressure
switch
(Cooling is
necessary.)
Crankcase
heater
Inverter
compressor
Brazed
locations (2)
Tube-with-
flare-nut
Remove the
discharge
thermistor
High pressure
switch
(Cooling is
necessary.)
Crankcase
heater
Inverter
compressor
Brazed
locations (2)
Tube-with-
flare-nut
Protect the sensors and the surrounding plates, rubber,
lead wires, clamps, and other items.
Remove the discharge thermistor shown in Fig. 18.
CAUTION
Cool the high pressure
switch and protect it.
CAUTION
(9) Pull the compressor toward you.
When pulling the compressor toward
you, be careful not to cause any abnormal
deformation of the tube-with-flare-nut.
CAUTION
In order to remove the tubing easily, remove the
cushioning rubber and put the compressor in the
low position.
Remove the cushioning rubber by using a bar.
Add something to the contact areas to protect
the bottom plate from the damage.
9. Compressor
2WAY VRF SYSTEM
Outdoor Unit Repair Procedures
9. Compressor
Installation
(1) Remove the rubber stopper and tube cap (brazed) from the new
compressor.
(2) Install the crankcase heater onto the new compressor.
(3) Temporary attach 3 pieces of cushioning rubber with the bolts
in the designated positions on the compressor.
(4) Place the new compressor on the cushioning rubbers to match
3 legs with them.
(5) Place the remaining cushioning rubber onto the new compressor,
at the position shown in the figure.
(6) Remove the flare nut from the new compressor, and connect the
tube-with-flare-nut.
(7) Shape the tubes and insert them at the 2 brazing locations.
(8) Connect a manifold gauge to the high- and low-pressure outlet
ports at the outdoor unit where the compressor was replaced.
Connect the manifold gauge to a nitrogen cylinder and perform
nitrogen gas replacement.
(9) Perform copper brazing at the 2 brazing locations.
(10) Follow the instructions in “5. Checking for Leakage After Repair”
and check for leaks at the outdoor unit where the compressor
was replaced.
(11) Attach the insulator surrounding the compressor.
(12) Follow the instructions in “6. Evacuating System” and apply vacuum to the outdoor unit where the compressor
was replaced.
When setting the compressor into the
unit, be careful not to cause any abnormal
deformation of the tube-with-flare-nut.
CAUTION
At this time, also check for leaks at the flare
nut connection on the tube-with-flare-nut.
CAUTION
Be sure to check for looseness of the power terminal connection
at the compressor terminal plate, and to check by pulling vertically
on the connections. If the terminals become disconnected easily,
replace the wiring Assy.
CAUTION
Washer
Bolt (M6)
Spacer (rubber)
Leg (compressor)
Cushioning rubber
Insulator for compressor
When attaching the insulator surrounding the compressor, be careful not to damage the insulator.
NOTE
SM830237-07_北米向け2WAY_VRF.indb 35
18/06/18 18:48:24
