Solenoid Valve (SV1~8)

Check if the control board’s output signals and the operation of the solenoid valves match.

Setting the self-diagnosis switch (SW1) as shown in the figure below causes the ON signal of each relay to be output to the LED’s.

Each LED shows whether the relays for the following parts are ON or OFF. When a LED lights up, it indicates that the relay is ON.

 

 

 

 

 

SW1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LED

 

 

 

 

 

 

 

 

 

 

 

 

 

1

2

3

4

5

6

7

8

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

2

3

4

5

6

7

8

 

9 10

 

 

 

 

 

2154a

SV1

 

SV22/32

 

ON

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2154b

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

2

3

4

5

6

7

8

9 10

 

SV4a

 

 

SV6a

 

 

 

 

ON

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

2

3

4

5

6

7

8

9 10

 

 

 

 

ON

 

 

 

 

 

 

 

SV3

SV4

SV5

SV6

SV7, 8

1) SV1 (Bypass valve)

1Since SV1 will be set to ON 4 minutes after the compressor has started operation, confirm operation by monitoring the

LED display and listening for the operation of the solenoid valve.

2It is possible to confirm the switching being performed by the operation of the solenoid valve while the unit is operating by monitoring the temperature of the bypass circuit or the sound of the refrigerant.

2)SV22, SV32 (Full load/unload switching valve) (only P500YMF-C)

1The No. 1 compressor is started first and operates for approximately 10 minutes and then the No. 2 compressor starts

in the unload mode. Since it will then switch to full load within 5 minutes, the operation can be confirmed by the LED display and the operating temperature of the solenoid valve. (If the indoor unit operating is small, the No. 2 compressor will not start.)

2It is possible to determine whether or not the compressors are switching from unload to full load by check the changes in amperage of the compressor at the moment of switching. The amperage under full load will be approximately 30 to 40 % more than operation under unload.

Note: The solenoid valve for SV22 is closed when conducting electricity while the SV32 is open when conducting electricity.

3)SV4a (Bypass valve)

1During unload operation in the cooling mode and when there is a rise in temperature and during unload operation in the heating mode, SV4a will be set to ON according to conditions, making is possible to check operation by the LED display and the operating sound of the solenoid valve.

2It is possible to confirm the switching for the operating status by the temperature of the bypass circuit or the sound of the refrigerant during the operation of the solenoid valve.

4)SV6b

When No. 2 compressor is operating and No. 2 compressor is stopped, the main SV6 will be set to ON, making it

possible to confirm operation by monitoring the LED display and listening to the operating sound. Note that it may be set to OFF if the outlet temperature (TH11) exceeds 120° C .

5)21S4a, 21S4b

21S4a, 21S4b are turned on during heating mode and heating-main mode.

6)SV3 ~ 8 (Control of heat exchanger capacity)

(a)Operations can be confirmed by LED display and operating sound of solenoid valve, because one or more of SV3 ~8 are turned on depending on conditions during cooling-only operations.

(b)Operation can be confirmed by LED display and operating sound of solenoid valve, because all of SV3 ~ 8 are turned on during heating-only operations.

(c)Operations can be confirmed by LED display and operating sound of solenoid valve, because one or more of SV3 ~8 are turned on depending on conditions during cooling-principal and heating-principal operations.

–67–

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Image 69
Mitsubishi Electronics PURY-P400, P500YMF-C specifications Solenoid Valve SV1~8, SW1, Led, SV3 SV4 SV5 SV6
Page 68 Page 70

PURY-P400, P500YMF-C specifications

Mitsubishi Electronics has long been a leader in the HVAC industry, known for its innovative technology and reliable performance. Among its notable offerings are the P500YMF-C and PURY-P400 models, designed to address the diverse needs of commercial and residential applications.

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In summary, the Mitsubishi P500YMF-C and PURY-P400 represent a fusion of technology, efficiency, and user-centric design. With a range of features aimed at enhancing performance and environmental sustainability, these models are an excellent choice for anyone looking to invest in a reliable and efficient HVAC system. Whether for residential or commercial use, Mitsubishi’s offerings continue to set the standard in comfort and efficiency.
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