Mitsubishi Electric PUHY-M200YNW-A1 Service Handbook page 344

[8-13 Parts Replacement Instructions ]
Replacement procedure for four-way valve (21S4a)
(5A) Remove the braze from the area above four-way valve (21S4a) as shown in Figure 6.
Figure 6
(6A) Remove the braze from the three areas below four-way valve (21S4a) as shown in Figure 7.
Figure 7
(7A) Mount a new four-way valve (21S4a).
Replacement procedure for four-way valve (21S4b)
(8B) Follow the same procedures as (5A) through (6A).
(9B) Mount a new four-way valve (21S4b). Figure 8 shows how to position a new four-way valve.
Four-way valve
coil C (21S4c)
Four-way valve
Figure 8
coil A (21S4a)
BS_08_E
20°
When seen from above, four-way valve (21S4b) is tilted by 20°.
The coil of four-way valve (21S4b) is tilted 20 degrees to the
opposite direction compared to the other four-way valves.
Four-way valve coil B
(21S4b)
89
chapter 8 -