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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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Troubleshooting
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Do you have a question about the PURY-HP72 and is the answer not in the manual?
Questions and answers
what is the set up mode for recovery, and charging of sys?
Why can control my indoor unit with centralize control
You may not be able to control your Mitsubishi Electric PURY-HP72 indoor unit with centralized control for the following reasons:
1. The power jumper connector on the outdoor unit may not be correctly set. It should be connected to CN40 on only one outdoor unit.
2. The central control switch (SW5-1) on the control board of all outdoor units must be set to "ON."
3. Address settings may not be correctly configured. The main indoor unit should be assigned the smallest address (e.g., IC00), and correct port number settings are required.
4. If using a remote controller alone, an interlock setting from the remote controller is needed.
5. Both ME and MA remote controllers cannot be connected to the same indoor unit group.
6. System controller power issues may occur if the outdoor unit fan rotates due to external forces, causing the system controller to detect an error.
7. Improper wiring or incorrect voltage at TB7 may also prevent operation.
Check each of these conditions to ensure proper centralized control.
This answer is automatically generated
Why can’t control indoor unit with centralize control and stay the MA control set up can’t. Control the mode
The Mitsubishi Electric PURY-HP72 indoor unit cannot be controlled with centralized control and the mode control setup does not function due to the following reasons:
1. Central control is not possible if the indoor/outdoor transmission line is used, even if TB7 terminals are daisy-chained.
2. Shielded cables must be used, and the connection must only be made after confirming the voltage is below 20 VDC.
3. Improper connection of the transmission line for centralized control, such as not correctly daisy-chaining terminals M1 and M2 or not short-circuiting the earth and S terminals on TB7.
4. If a power supply unit is not connected to the centralized control line, the power jumper connector must be moved from CN41 to CN40 on one outdoor unit—if this is not done, mode control will not function.
5. Overlapped indoor unit addresses or noise interference on the remote controller lines can also prevent proper control.
6. Failure to set one MA remote controller to MAIN or exceeding its capacity can result in control failure.
All these factors must be correctly configured for centralized and mode control to function properly.
This answer is automatically generated