Mitsubishi Electric City Multi CMH-WM250V-A, Service Handbook

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[8-13 Parts Replacement Instructions ]
92
- chapter 8 BS_08_E
8 Troub
le
sho
oting Bas
ed on Ob
ser
ved
Sy
mp
toms
Figure 9
(12) Remove the four bolts holding the compressor down. (See Figure 12.)
The two bolts in the front are also holding down the metal sheets.
(13) Tilting the compressor will cause the refrigerant oil to leak. Seal the pipe where it was cut or removed at the brazed
section.
(14) After replacing the compressor, braze the pipes that were removed as they were.
In case of brazing the suction pipe, protect the surrounding components such as the control box, ACC, compressor cover,
and damper with a fire protection panel (e.g., recommended felt soaked in water), attach the supplied pipe,and perform
brazing. (See Figure 13.)
*Perform brazing, referring to "Notes on replacing refrigerant circuit components (check valve, four-way valve, solenoid
valve, and LEV)" in 8-13-3.
(15) The recommended tightening torque for the compressor fixing bolts is 3.0 N·m. Fasten the bolts using a torque wrench or
other tool that can apply the specified torque.
(16) Re-place the compressor covers in the reverse order as they were removed.
*Hold the TH15 wiring in place with the bands to keep the wiring from coming in contact with insulation 2. (See Figures 3
and 7.)
Figure 12
Control box
Attach the supplied pipe.
ACC
Compressor
Fire protection panel
(Recommended felt soaked in water etc.)
Figure 13
Damper
Area to be brazed
Compressor fixing bolts
Compressor fixing
metal sheets and bolts
(9) Remove the pipe cover and the damper, and cut the suction pipe where indicated in Figure 9.
(10) Remove the pipe covers, and then remove the braze. (See Figure 10.)
* Do not force the injection pipe to deform.
(11) Remove the compressor discharge pipe by cutting the pipe where indicated in Figure 11 or by removing the braze.
Figure 11
Damper and cable tie
(Length: 180 mm and 250 mm)
Pipe cover
(ID: 43 mm; Length: 260 mm)
Cut the suction
pipe here.
Cut the compressor
discharge pipe here.
Figure 10
Remove the braze here.
Remove the two
pipe covers.
* Save the pipe
covers for later
use.
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