Mitsubishi Electric PURY-HP144, Service Handbook

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[8-13 Parts Replacement Instructions ]
HWE18220_GB chapter 8 -
71
8 Troubleshooting Based on Observed Symptoms
Four-way valve (21S4b) Four-way valve (21S4b)
Four-way valve (21S4b)
Four-way valve (21S4b)
Remove the braze here.
Remove the braze here.
Remove the braze here.
Remove the braze here.
Cut the pipe here.
Cut the pipe here.
Remove the
braze here.
Remove the
braze here.
Figure 15
Figure 16
Figure 17
The replacement parts for this part
is included with the replacement
kit that contains four-way valves
(21S4a and 21S4b). Use the parts
included with the four-way valve.
After being removed, leave the
pipes at the bottom inside the unit.
(Once removed from the unit, it will
be difficult to re-place the pipes.)
A cap for sealing the refrigerant
pipe is included with the
replacement kit that contains
four-way valve (21S4b). Replace
the cap with the one included
with the four-way valve.
Replacement procedure for the four-way valve (21S4b)
(15B) Cut the pipe below four-way valve (21S4b) and in the middle with a pipe cutter as shown in the figure.
After cutting the pipe where indicated in the figure, remove the braze at the two areas shown in Figure 15.
(16B) Remove the pipe below four-way valve (21S4b) and on the front by removing the braze at the two areas shown in Figure
16.
(17B) Remove four-way valve (21S4b) by removing the braze from the area above four-way valve (21S4b) as shown in Figure
17.