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Solenoid Valve Block And Check Valve Replacement Instructions - Mitsubishi Electric PURY-HP72 Service Handbook

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[8-16 Solenoid Valve Block and Check Valve Replacement Instructions ]

8-16 Solenoid Valve Block and Check Valve Replacement
Instructions
R410A CITY MULTI H2i R2 Solenoid valve block ASSY (SV4a, SV4b, SV4d), Check valve (CV4a, CV6a, CV8a, CV9a)
replacement instructions
* Following instructions show procedures for replacing service parts for Solenoid valve block ASSY (SV4a, SV4b,
SV4d), Check valve (CV4a, CV6a, CV8a, CV9a). Replace them properly according to the procedures.
1 1 . . Applicable models
PURY-HP72,96TKMU-A-H(-BS)
2 2 . . Parts to be serviced, Set-content
Following instructions are applicable to 1-4 service parts on the table below.
NO.
Parts to be serviced
Solenoid valve block ASSY
1
(SV4a, SV4b, SV4d)
Check valve
2
(CV4a, CV8a)
3
Check valve (CV6a)
4
Check valve (CV9a)
3 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 figure above right before replacing service parts.
Mount the removed parts back in place in a reversed procedure of 1)-3) on the figure above right after replacing
service parts.
(1) Solenoid valve block ASSY (SV4a, SV4b, SV4d) replacement procedures
To remove Solenoid valve block ASSY
Remove the solenoid valve block coil cover, solenoid valve coil, and peripheral cables.
Remove the screw (M5) that fixes the supporting plate for solenoid valve block and the unit base.
Debraze A-G parts (total 7 places).
Do not damage heat exchanger fins and peripheral piping devices when removing the Solenoid valve block ASSY.
Remove the screw (M5) that fixes the solenoid valve block and the supporting plate for solenoid valve block.
To install Solenoid valve block ASSY
Fix the Solenoid valve block ASSY and the supporting plate with the fixing screw (M5).
Mount the Solenoid valve block ASSY replacement to the unit with care not to damage heat exchanger fins and peripheral
piping devices. Fix the supporting plate for solenoid valve block and the unit base with the fixing screw (M5).
Braze A-G parts (total 7 places).
Mount the solenoid valve block coil cover, solenoid valve coil, and peripheral cables back in place.
* Precautions for replacing Solenoid valve block ASSY
Be sure to perform no-oxidation brazing when brazing.
Place a wet towel on the solenoid valve block when heating pipes to keep the temperature of the valve from
exceeding 120ºC.
After brazing, check the condition around the brazing. After confirming no leakage, evacuate the air inside.
Perform brazing with care of 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.
HWE13080
PURY-HP72,96YKMU-A(-BS)
Things required for replacing
I
e t
m
Solenoid valve block service parts set
Set-content
Replacement instructions
Solenoid valve block ASSY
Service parts replacement instructions
Set-content
Replacement instructions
Check valve
Service parts replacement instructions
Set-content
Replacement instructions
Check valve
Service parts replacement instructions
Set-content
Replacement instructions
Check valve
- 315 -
C
o
d
e
Numbers
KB00S879G20
1
WT07188X01
1
KB00V126G01
1
1
KB00S879G14
1
WT06632X01
1
P639183X01
KB00S879G15
1
WT06632X01
1
P633133X01
1
KB00S879G16
1
WT06632X01
1
P639180X01
1
GB

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