Mitsubishi Electric Mr Slim PUHZ-RP50VHA4 Service Manual page 149

OPERATING PROCEDURE
8. Removing the 4-way valve coil (21S4), and LEV coil (LEV(A),
LEV(B))
(1) Remove the service panel. (See Photo 1)
(2) Remove the top panel. (See Photo 1)
(3) Remove the electrical parts box. (See Photo 5)
[Removing the 4-way valve coil]
(4) Remove 4-way valve coil fixing screw (M4 × 6).
(5) Remove the 4-way valve coil by sliding the coil toward you.
[Removing the LEV coil]
(4) Remove the LEV coil by sliding the coil upward.
9. Removing the 4-way valve
(1) Remove the service panel. (See Photo 1)
(2) Remove the top panel. (See Photo 1)
(3) Remove the valve bed fixing screws (3 for front, 4 × 10)
and the ball valve and stop valve fixing screws (4 for front,
5 × 16) then remove the valve bed.
(4) Remove the side panel (R) fixing screws (4 for rear, 5 × 12)
in the rear of the unit then remove the side panel (R). (See
Photo 1)
(5) Remove the 4-way valve coil. (See Photo 15)
(6) Recover refrigerant.
(7) Remove the welded part of 4-way valve.
Note 1: Recover refrigerant without spreading it in the air.
Note 2: The welded part can be removed easily by remov-
ing the side panel (R).
Note 3: When installing the 4-way valve, cover it with a
wet cloth to prevent it from heating (120°C or
more), then braze the pipes so that the inside of
pipes are not oxidized.
10. Removing LEV
(1) Remove the service panel. (See Photo 1)
(2) Remove the top panel. (See Photo 1)
(3) Remove the valve bed. (See Figure 1)
(4) Remove the side panel (R). (See Photo 1)
(5) Remove the LEV coil.
(6) Recover refrigerant.
(7) Remove the welded part of LEV.
Note 1: Recover refrigerant without spreading it in the air.
Note 2: The welded part can be removed easily by remov-
ing the side panel (R).
Note 3: When installing the LEV, cover it with a wet cloth
to prevent it from heating (120°C or more), then
braze the pipes so that the inside of pipes are not
oxidized.
11. Removing the high pressure switch (63H)
(1) Remove the service panel. (See Photo 1)
(2) Remove the top panel. (See Photo 1)
(3) Remove the side panel (R). (See Photo 1)
(4) Pull out the lead wire of high pressure switch.
(5) Recover refrigerant.
(6) Remove the welded part of high pressure switch.
Note 1: Recover refrigerant without spreading it in the air.
Note 2: The welded part can be removed easily by
removing the side panel (R).
Note 3: When installing the high pressure switch, cover it
with a wet cloth to prevent it from heating (100°C
or more), then braze the pipes so that the inside
of pipes are not oxidized.
OCH451D
Photo 15
Figure 1 (PUHZ-RP100/125YKA)
Valve bed
(PUHZ-RP140YKA)
High pressure
switch (63H)
4-way valve
coil (21S4)
Valve bed
149
PHOTOS
4-way valve
4-way valve
coil (21S4)
High pressure
switch (63H)
Thermistor
<Ref. check>
(TH33)
LEV coil
(LEV A)
LEV coil
(LEV B)
Ball valve
Stop valve
LEV coil
(LEV C)
LEV coil
(LEV B)
Thermistor
<Ref. check>
(TH33)
4-way valve
LEV coil
(LEV A)
Ball valve
Stop valve