Mitsubishi Electric EHGT17D-YM9ED Service Manual page 90

DISASSEMBLY PROCEDURE
18. How to remove the H.P. switch, the H.P. sensor, and
the muffler
(1) Pull out the module unit assy. (Refer to Procedure 11.)
(2) Remove the module box front. (Refer to Procedure 13-2.)
(3) Remove the module box top, the module box side L, the
module box side R, and the module box back from the
module unit assy (20 screws 4×10). (Figure 11-5-1)
(4) Remove the booster heater. (Refer to Procedure 16.)
(5) Remove the COMP case top (8 screws 4×10). (Photo 18-
1)
(6) Disconnect the relay connector when removing the H.P.
sensor or H.P. switch.
(7) Recover refrigerant. (Refer to Procedure 17-8.)
(8) Remove the band E bundling the lead wires in the COMP
case, and divide the lead wires for each replacement part.
(Photo 18-1)
(9) Remove the nut, the washer, and the terminal cover from
the compressor. (Photo 18-2)
(10) Disconnect the lead wire (TH33, TH4, H.P. switch,
and the COMP wire in the terminal cover) from the
compressor. (Photo 18-2)
(11) Remove the INS (SUC MUF) from the compressor. (Photo
18-2) (If the INS (SUC MUF) cannot be reused, obtain it
locally.)
(12) Detach the brazing portions connecting the compressor
and the discharge pipe, and P-HEX and the discharge
pipe. (Photo 18-2)
(13) Remove the 4 bands and the 3 rubber cushions from the
pipe. (Photo 18-3)
(14) Detach the brazing portion of a part to be replaced (H.P.
switch/ H.P. sensor/ muffler). (Photo 18-3)
Note:
▪ The temperature of H.P. switch must be 100°C or under
when brazing.
▪ The temperature of H.P. sensor must be 100°C or under
when brazing.
▪ Use screws 4×10 to fix the COMP case top.
Photo 18-3
H.P. switch
Muffler
Brazing portion of
H.P. switch and H.P. sensor
OCH722A
H.P. sensor
Rubber cushion
PHOTOS/ FIGURES
Photo 18-1
Band E
COMP case top
(Screws 4×10)
Photo 18-2
Nut
Washer
Terminal cover
INS (SUC MUF)
90
Booster heater
Brazing portion of
COMP discharge pipe
Compressor
TH4
TH33
Brazing portion of
P-HEX discharge pipe