Service Manual

VMH Series

Heat Controller, Inc.

 

 

 

Room temp.(T1) sensor,

Indoor coil temp.(T2) sensor,

Outdoor coil temp.(T3) sensor,

Outdoor ambient temp.(T4) sensor,

Compressor exhaust temp.(Te) sensor.

Measure the resistance value of each winding by using the multi-meter.

Some frequently-used R-T data for Te sensor:

Temperature (0°F)

41°F/5°C

59°F/15°C

77°F/25°C

95°F/35°C

140°F/60°C

158°F/70°C

176°F/80°C

194°F/90°C

212°F/100°C

 

 

 

 

 

 

 

 

 

 

Resistance Value

141.6

88

56.1

36.6

13.8

9.7

6.9

5

3.7

(KΩ)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Some frequently-used R-T data for T1, T2, T3 and T4 sensor:

Temperature

41°F/5°C

50°F/10°C

59°F/15°C

68°F/20°C

77°F/25°C

86°F/30°C

104°F/40°C

122°F/50°C

140°F/60°C

(0°F)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Resistance

26.9

20.7

16.1

12.6

10

8

5.2

3.5

2.4

Value (KΩ)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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Image 44
Heat Controller VMH12SC-1, VMH24SC-1, VMH09SC-1, VMH18SC-1 Some frequently-used R-T data for T1, T2, T3 and T4 sensor