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[
IX
Troubleshooting ]
- 233 -
HWE1113B
GB
1. Solenoid valve block ASSY (SV4a, SV4b, SV4c, SV4d), Check valve (CV4a, CV6a, CV8a, CV9a, CV10a) replacement
instructions
* Following instructions show procedures for replacing service parts for Solenoid valve block ASSY (SV4a, SV4b,
SV4c, SV4d), Check valve (CV4a, CV6a, CV8a, CV9a, CV10a). Replace them properly according to the procedures.
1. Applicable models
•
PURY-WP2
00,
2
50
Y
J
M-A
(-B
S
)
2. Parts to be serviced, Set-content
Following
instru
c
tions
are
appli
c
able
to
1-
4
servi
c
e
parts
on
t
h
e
table
below.
NO.
Parts to be serviced
1 Solenoid
valve
block
ASSY
(SV4a, SV4b, SV4c, SV4d)
2
Check valve (CV4a, CV8a)
4
Check valve (CV6a, CV10a)
3 Check
valve
(CV9a)
Things required for replacing
Item
Solenoid valve block service parts set
[S
et-
c
ontent
]
•
Repla
c
ement
instru
c
tions
•
S
olenoid
valve
blo
ck
A
SS
Y
•
Conne
c
ting
pipe
(
ø9
.
5
2
[3
/
8"]
)
Numbers
1
1
1
1
Service parts replacement instructions set
[S
et-
c
ontent
]
•
Repla
c
ement
instru
c
tions
•
Conne
c
ting
pipe
(
ø9
.
5
2
[3
/
8"]
)
1
1
1
3. Procedures
*
Precautions for starting replacement
•
Check that the main power supply is OFF.
•
Check that no refrigerant is in the outdoor unit.
Remove each part according to the 1)-3) procedures on the next page before replacing service parts.
Mount the removed parts back in place in a reversed procedures of 1)-3) on the next page after replacing service
parts.
(1) Solenoid valve block ASSY (SV4a, SV4b, SV4c, SV4d) replacement procedures
To
remove
S
olenoid
valve
blo
ck
A
SS
Y
Remove
t
h
e
solenoid
valve
blo
ck c
oil
c
over
,
solenoid
valve
c
oil
,
and
perip
h
eral
c
ables.
Remove
t
h
e
s
c
rew
(M
5
)
t
h
at
f
ixes
t
h
e
solenoid
valve
blo
ck
and
t
h
e
supporting
plate
f
or
solenoid
valve
blo
ck
.
Cut
t
h
e
pipe
at
t
h
e
position
indi
c
ated
on
t
h
e
rig
h
t
f
igure
wit
h
a
pipe
c
utter.
Remove
t
h
e
pipe
f
rom
t
h
e
bra
z
ed
A
part.
Debra
z
e
B-H
parts
(total
7
pla
c
es).
Do
not
damage
h
eat
ex
ch
anger
f
ins
and
perip
h
eral
piping
devi
c
es
w
h
en
removing
t
h
e
S
olenoid
valve
blo
ck
A
SS
Y.
To
install
S
olenoid
valve
blo
ck
A
SS
Y
Mount
t
h
e
S
olenoid
valve
blo
ck
A
SS
Y
repla
c
ement
to
t
h
e
unit
wit
h c
are
not
to
damage
h
eat
ex
ch
anger
f
ins
and
perip
h
eral
piping
devi
c
es.
Fix
t
h
e
S
olenoid
valve
blo
ck
A
SS
Y
and
t
h
e
supporting
plate
wit
h
t
h
e
f
ixing
s
c
rew
(M
5
).
Bra
z
e
B-H
part
(total
7
pla
c
es)
,
and
c
onne
c
t
t
h
e
solenoid
valve
blo
ck
and
t
h
e
h
eat
ex
ch
anger
h
eader
wit
h
t
h
e
c
onne
c
t-
ing
pipe
(
ø9
.
5
2
[3
/
8"]
)
t
h
at
c
omes
wit
h
t
h
e
servi
c
e
parts
set.
Mount
t
h
e
solenoid
valve
blo
ck c
oil
c
over
,
solenoid
valve
c
oil
,
and
perip
h
eral
c
ables
ba
ck
in
pla
c
e.
*Precautions for replacing Solenoid valve block ASSY
Be sure to perform no-oxidation brazing when brazing.
After brazing, check the condition around the brazing. After confirming no leakage, evacuate the air inside.
*1
Perform carefully with the flame direction so that it does not burn cables and plates etc. in the unit.
Remove the brazing part protecting heat exchanger fins from burning, and replace the service parts.
*1. Refer to Chapter I [8] Vacuum Drying (Evacuation) for detailed procedure.(page 10)
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