Mitsubishi Electronics Understanding the Linear Expansion Valve in Mitsubishi Air Conditioners
Page 21

<Thermistor characteristic graph>

 

 

 

 

 

 

 

 

 

Thermistor <Room temperature detection> (TH21)

Thermistor for

 

 

Thermistor <Liquid pipe temperature detection> (TH22)

lower temperature

 

 

 

 

 

Thermistor <Gas pipe temperature detection> (TH23)

 

 

 

 

Thermistor R0=15k' ± 3%

 

 

 

 

 

Fixed number of B=3480K ± 2%

 

 

 

 

 

Rt=15exp { 3480(

1

 

 

 

 

 

 

 

1

 

 

) }

273+(t-32)/1.8

273

 

 

 

 

 

 

 

30_F 15.8k'

 

 

 

 

 

 

 

 

 

 

 

 

50_F

9.6k'

 

 

 

 

 

 

 

 

 

 

 

 

70_F

6.0k'

 

 

 

 

 

 

 

 

 

 

 

 

80_F

4.8k'

 

 

 

 

 

 

 

 

 

 

 

 

90_F

3.9k'

 

 

 

 

 

 

 

 

 

 

 

 

100_F

3.2k'

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Thermistor for

 

Drain sensor (DS)

 

 

drain sensor

 

 

 

 

 

 

 

 

 

 

 

 

 

Thermistor R0=6.0k' ±5%

 

 

 

 

 

Fixed number of B=3390K ±2%

 

 

 

 

 

Rt=6exp { 3390(

 

1

 

 

 

 

 

 

1

 

) }

273+(t-32)/1.8

273

 

 

 

 

 

 

 

30_F 6.3k'

 

 

 

 

 

 

 

 

 

 

 

 

50_F 3.9k'

 

 

 

 

 

 

 

 

 

 

 

 

70_F 2.5k'

 

 

 

 

 

 

 

 

 

 

 

 

80_F 2.0k'

 

 

 

 

 

 

 

 

 

 

 

 

90_F 1.6k'

 

 

 

 

 

 

 

 

 

 

 

 

100_F 1.3k'

 

 

 

 

 

 

 

 

 

 

 

 

140_F

0.6k'

 

 

 

 

 

 

 

 

 

 

 

 

< Thermistor for lower temperature >

 

50

 

40

(k")

30

Resistance

20

 

 

10

 

0

 

-20

0

20

40

60

80

100

120

 

 

 

 

 

Temperature (°F)

 

 

 

10

 

< Thermistor for drain sensor >

 

 

 

 

 

 

 

 

 

 

 

 

 

9

 

 

 

 

 

 

 

 

 

 

 

 

8

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

)

7

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(k"

6

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Resistance

 

 

 

 

 

 

 

 

 

 

 

5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

20 40 60 80 100 120 140 170

Temperature (°F)

Linear expansion valve

1Operation summary of the linear expansion valve

•Linear expansion valves open/close through the use of a stepping motor after receiving the pulse signal from the indoor controller board.

•Valve position can be changed in proportion to the number of pulse signals.

<Connection between the indoor controller board and the linear expansion valve>

Controller board

Linear expansion valve

4 Blue

M6 Brown

Yellow

52

1 3

White Red Orange

 

 

 

DC12V

 

Brown

6

 

 

Red

5

Drive circuit

 

 

 

[4

Blue

4

[4

[3

Orange

3

[3

[2

Yellow

2

[2

[1

White

1

[1

 

Connector (CN60)

 

 

Note : Since the number of the connector at the controller board side and the relay connector are different, follow the color of the lead wire.

21

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Contents Revised EDITION-B ContentsTechnical Changes FeaturesPart Names and Functions Remove dust and pollutants from return airReturns air from room ˚F˚C Display SectionSpecifications SpecificationWNote Refer to Wiring Diagram for the supplied voltage Electrical Parts SpecificationsHow to read curves AIR Capacity Taken from OutsideOperation in conjunction with duct fan Booster fan PMFY-P15NBMU-E Noise Criterion Curves PMFY-P06NBMU-EPMFY-P08NBMU-E PMFY-P12NBMU-ERight side Installation space required aroundIndoor TopPMFY-P06NBMU-E PMFY-P08NBMU-E Wiring DiagramPMFY-P06NBMU-E1PMFY-P08NBMU-E1 PmfyE1PMFY-P15NBMU-E1 Unitin.mm Refrigerant System DiagramMicroprocessor Control How to operateIndoor Unit Control 8-1. Cool Operation Pressed once. Cooling 67 to 87FControl modes Drain pump Vane Drain sensor functionBasic control system DRY Operation Desired temperaturePressed once. Dry 67 to 87F Drain pump Same control as Cool operation VaneFAN Operation On the vanes downward blow settingHeat Operation Pressed once. Heating 63 to 83FDisplay in Heat operation Defrost From the preceding Auto Operation Automatic COOL/HEAT Change Over Operation When Unit is StoppedTrouble Shooting Operation summary of the linear expansion valve Linear expansion valveOutput Phase Trouble shootingLinear expansion valve operation Any broken wire by using a tester Replace the fuse TroubleshootingReplace the fan motor Indoor controller board fuse check YesFunction of DIP Switch SW14 Switch Switch Pole SW11Operation by switch Effective SW12SW4 Operating Procedure PHOTOS&ILLUSTRATIONS Disassembly ProcedureRemoving the electrical parts box Removing the nozzleRemoving the vane motor Removing the thermistorRoom temperature detection Removing the drain pumpRemoving the fan motor and line flow fan Qty/set Remarks Part Name SpecificationDrawing No E11 003Part number that is circled is not shown in the figure Electrical Parts PMFY-P06NBMU-E PMFY-P08NBMU-E E16 RoHSR01 E01 E07 E14 E15 E04R01 E04 103 R01 23A 102R01 E32 114 R01 E01 079E41 716 Qty/setR01 E27 246 R01 E21 246Made in Japan

PMFY-P08NBMU-E, PMFY-P12NBMU-E1, PMFY-P08NBMU-E1, PMFY-P06NBMU-E, PMFY-P12NBMU-E specifications

Mitsubishi Electronics has long been a pioneer in the field of air conditioning and climate control technologies. Among their impressive lineup of products is the PMFY series, which includes models such as the PMFY-P06NBMU-E1, PMFY-P12NBMU-E, PMFY-P06NBMU-E, PMFY-P08NBMU-E1, and PMFY-P12NBMU-E1. These advanced air conditioning systems are engineered to offer optimal comfort, energy efficiency, and innovative features for both residential and commercial applications.

One of the standout features of the PMFY series is its exceptional energy efficiency. Many models are equipped with advanced inverter technology, which allows for precise temperature control while significantly reducing energy consumption. This results in lower electricity bills and a reduced carbon footprint, making them an environmentally friendly choice for conscientious consumers.

Another key characteristic of the PMFY series is its advanced filtration system. These units are designed to improve indoor air quality by incorporating high-performance filters that effectively remove dust, allergens, and other pollutants. This is especially beneficial for individuals with respiratory conditions, contributing to a healthier indoor environment.

The PMFY models also boast a sleek and modern design, ensuring they blend seamlessly with any interior décor. Compact and lightweight, they can be installed in various settings, maximizing available space without compromising on performance.

Mitsubishi’s proprietary technology features an intelligent control system that allows users to manage their air conditioning units remotely. With options for Wi-Fi connectivity and compatibility with smart home systems, users can easily set schedules, adjust temperatures, and monitor energy usage from their smartphones or tablets.

Noise reduction is another important aspect of the PMFY series. These units operate at whisper-quiet levels, ensuring a peaceful atmosphere in homes and workplaces. This noise control technology is particularly advantageous for bedrooms, offices, and other quiet environments.

Lastly, the PMFY series is designed to be robust and reliable, with components that are engineered for durability and long life. Mitsubishi Electronics stands behind their products with comprehensive warranties, providing peace of mind and exceptional customer service.

In summary, the Mitsubishi Electronics PMFY-P06NBMU-E1, PMFY-P12NBMU-E, PMFY-P06NBMU-E, PMFY-P08NBMU-E1, and PMFY-P12NBMU-E1 are exemplary models that embody the essence of innovation, efficiency, and reliability. They represent the ideal choice for those seeking advanced climate control solutions suitable for a variety of spaces.
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