Removing The 4-Way Valve Coil; Removing The 4-Way Valve And Bypass Valve; Removing The Linear Expansion Valve - Mitsubishi Electric PUHZ-RP250YHA2 Service Manual

OPERATING PROCEDURE
7. Removing the 4-way valve coil (21S4) and linear expan-
sion valve coil (LEV-A, LEV-B) and bypass valve coil(SV)
(1) Remove the service panel. (See figure 1.)
(2) Remove the top panel. (See figure 1.)
(3) Remove the electrical parts box . (See photo 3.)

[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 linear expansion valve coil]
(4) Remove the linear expansion valve coil by sliding the coil
upward.
[Removing the bypass valve coil]
(4) Remove bypass valve coil fixing screw (M4 × 6).
(5) Remove the bypass valve coil by sliding the coil upward.

8. Removing the 4-way valve and bypass valve

(1) Remove the service panel. (See figure 1.)
(2) Remove the top panel. (See figure 1.)
(3) Remove the electrical parts box. (See photo 3.)
(4) Remove 3 valve bed fixing screws (4 × 10), 4 ball valve
and stop valve fixing screws (5 × 16) then remove the
valve bed.
(5) Remove 3 right side panel fixing screws (5 × 10) in the
rear of the unit then remove the right side panel.
[Removing the 4-way valve]
(6) Remove the 4-way valve coil.
(7) Recover refrigerant.
(8) Remove the welded part of 4-way valve.
[Removing the bypass valve]
(6) Remove bypass valve coil.
(7) Recover refrigerant.
(8) Remove the welded part of bypass valve.

9. Removing the linear expansion valve

(1) Remove the service panel. (See figure 1.)
(2) Remove the top panel. (See figure 1.)
(3) Remove 3 valve bed fixing screws (4 × 10), 4 ball valve
and stop valve fixing screws (5 × 16) then remove the
valve bed.
(4) Remove 4 right side panel fixing screws (5 × 10) in the rear
of the unit then remove the right side panel.
(5) Remove the linear expansion valve coil.
(6) Recover refrigerant.
(7) Remove the welded part of linear expansion valve.
Photo 7
4-way valve
4-way
valve
coil
4-way valve coil fixing screw
Note 1: Recover refrigerant without spreading it in
the air.
Note 2: The welded part can be removed easily by
removing the right side panel.
Note 3: When installing the parts of refrigerant cir-
cuit, 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.
95
PHOTOS
(Photo:PUHZ-RP200YHA2)
Bypass valve coil fixing
screw
Bypass
valve coil
Bypass
valve
Linear
expan-
sion valve
coil(LEV-A)
Linear
expansion
valve