Mitsubishi Electric PLFY-P-VLMD-E Service Manual download pdf (Page 16)

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< Thermistor for lower temperature >

Temperature (˚C)

Resistance (KΩ )

ø4

ø3

ø2

ø1

ø4

ø3

ø2

ø1

Controller board

Drive circuit

Connector(CN60)

DC12V

Brown

Red

Blue

Orange

Yellow

White

Blue

Brown

Yellow

Orange

Red

White

Linear expansion valve

Table of thermistor resistance

Thermistor (piping temperature detection,

room temperature detection)

Thermistor Ro = 15kΩ±3%

B constant = 3480kΩ±2%

Thermistor R

0=15kΩ±3%

Fixed number of B=3480kΩ±2%

Rt=15exp { 3480( ) }

0˚C 15kΩ

10˚C 9.6kΩ

20˚C 6.3kΩ

25˚C 5.2kΩ

30˚C 4.3kΩ

40˚C 3.0kΩ

Linear expansion valve

Operation summary of the linear expansion valve.

• Linear expansion valve open/close through stepping motor after receiving the pulse signal from the indoor controller board.

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

273+t

273

1 2 ... 11 12 13 14 15 16 17 18 19 20 21 ... 34 35

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Mitsubishi Electric PLFY-P-VLMD-E Service Manual Page 16

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