Mitsubishi Electric PAC-LV11M-J Installationshandbuch PDF herunterladen (Seite 23)

7.2. Check methods

1. Component and check points

(1) Thermistor

Gas pipe thermistor (TH23)

Disconnect the connector and measure the resistance between terminals with a tester.

(Ambient temperature 10°C - 30°C)

1) Thermistor characteristic graph

(2) Linear expansion valve

Disconnect the connector, and measure the resistance between terminals with a tester.

Refer to the next page for details.

Normal Abnormal

4.3kΩ - 9.6kΩ Open or short

(Refer to the thermistor characteristic graph below.)

Low-temperature thermistor

Gas pipe thermistor (TH23)

Thermistor R

= 15 kΩ±3%

Multiplier of B = 3480 kΩ±2%

0°C 15kΩ

10°C 9.6kΩ

20°C 6.3kΩ

25°C 5.2kΩ

30°C 4.3kΩ

40°C 3.0kΩ

(A) Temperature (°C)

(B) Resistance (kΩ)

Rt = 15 exp { 3480( ) }

273+t

273

-20 -10 0 10 20 30 40 50

(A)

(B)

Normal Abnormal

1-5 2-6 3-5 4-6 Open or short

White-Red Yellow-Brown Orange-Red Blue-Brown

200 kΩ±10%

(A) Brown (D) Orange

(B) Red (E) Yellow

LEV

(A)

(B)

(C)

(D)

(E)

(F)

CN60

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