Daikin EWYQ230DAYN [429/524] Temperature and resistance characteristics of thermistor type 3

ESIE06-05 Checking the Temperature Sensors

Part 3 – Troubleshooting 3–29

2.3 Temperature and Resistance characteristics of Thermistor Type 3

Introduction The thermistors in use have the following temperature (°C) to resistance (K Ω) characteristics.

Explanation X-Axis: indicates tens digit (°C).

Y-Axis : Indicates ones digit (°C).

In the case of -9°C characteristics : -10 + 1 = -9.

Therefore, see the characteristics (K Ω) at the intersection of -10 (tens digit) and 1 (ones digit).

Similarly, in the case of 12°C characteristics : 10 + 2= 12.

Therefore, see the characteristics (K Ω) at the intersection of 10 (tens digit) and 2 (ones digit).

The table below contains the temperature resistance values of sensor type 3.

Temp.-resistance

Example: characteristics at -9°C

Example: characteristics at 12°C

-10 0 10 20 30 40 50

0 48.5 30.0 19.2 12.7 8.6 6.0 4.3

1 46.1 28.6 18.4 12.2 8.3 5.8 4.1

2 43.9 27.4 17.6 11.7 8.0 5.6 4.0

3 41.8 26.2 16.9 11.2 7.7 5.4 3.9

4 39.8 25.0 16.2 10.8 7.4 5.2 3.7

5 38.0 23.9 15.5 10.4 7.1 5.0 3.6

6 36.2 22.9 14.9 10.0 6.9 4.9 3.5

7 34.5 21.9 14.3 9.6 6.6 4.7 3.4

8 32.9 20.9 13.7 9.3 6.4 4.5 3.3

9 31.4 20.1 13.2 8.9 6.2 4.4 3.2

-10 100

46.1

-10 100

2 17.6