Compressor and thermistor resistance, Refrigerant circuit guideline, Versatec base series installation manual – WaterFurnace Versatec Base User Manual

Page 45: Compressor resistance, Thermistor resistance

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45

VERSATEC BASE SERIES INSTALLATION MANUAL

Symptom

Head

Pressure

Suction

Pressure

Compressor

Amp Draw

Superheat

Subcooling

Air Temp.

Differential

Water Temp.

Differential

Under Charged System (Possible Leak)

Low

Low

Low

High

Low

Low

Low

Over Charged System

High

High

High

Normal

High

Normal/Low

Normal

Low Air Flow Heating

High

High

High

High/Normal

Low

High

Low

Low Air Flow Cooling

Low

Low

Low

Low/Normal

High

High

Low

Low Water Flow Heating

Low/Normal

Low/Normal

Low

Low

High

Low

High

Low Water Flow Cooling

High

High

High

High

Low

Low

High

High Air Flow Heating

Low

Low

Low

Low

High

Low

Low

High Air Flow Cooling

Low

High

Normal

High

Low

Low

Normal

High Water Flow Heating

Normal

Low

Normal

High

Normal

Normal

Low

High Water Flow Cooling

Low

Low

Low

Low

High

Normal

Low

Low Indoor Air Temperature Heating

Low

Low

Low

Normal

High

Normal

Normal/High

Low Indoor Air Temperature Cooling

Low

Low

Low

Normal/Low

High

Low

Low

High Indoor Air Temperature Heating

High

High

High

Normal/High

Normal/Low

Low

Normal

High Indoor Air Temperature Cooling

High

High

High

High

Low

Low

High

Restricted TXV (Check Service Advisory)

High

Low

Normal/Low

High

High

Low

Low

Insufficient Compressor (Possible Bad Valves)

Low

High

Low

High

Normal/High

Low

Low

TXV - Bulb Loss of Charge

Low

Low

Low

High

High

Low

Low

Scaled Coaxial Heat Exchanger Heating

Low

Low

Low

Normal/Low

High

Low

Low

Scaled Coaxial Heat Exchanger Cooling

High

High

High

Normal/Low

Low

Low

Low

Restricted Filter Drier

Check temperature difference (delta T) across filter drier.

7/6/10

Compressor and Thermistor Resistance

Refrigerant Circuit Guideline

Compressor Resistance

Model

115/60/1

208-230/60/1

265/60/1

208-230/60/3

460/60/3

575/60/4

Run

Start

Run

Start

Run

Start

006

1.25-1.43

2.70-3.10

5.30-6.09

5.12-5.89

8.33-9.59

4.25-4.89

009

0.77-0.89

1.79-2.05

3.65-4.19

3.75-4.31

3.73-4.27

4.45-5.13

012

Not Available at Time of Publication

3.35-3.85

2.80-3.22

3.73-4.27

4.45-5.13

015

2.74-3.16

2.60-3.00

3.03-3.49

2.39-2.75

018

2.24-2.58

2.84-3.26

3.03-3.49

2.39-2.75

024

1.36-1.50

2.26-2.50

1.33-1.47

2.34-2.58

1.29-1.43

5.06-5.6

030

0.93-1.03

1.64-1.82

1.33-1.47

2.34-2.58

1.29-1.43

5.06-5.6

036

0.60-0.66

1.20-1.32

0.76-0.84

1.67-1.85

1.09-1.21

4.38-4.84

042

0.49-0.55

1.56-1.73

1.09-1.21

4.38-4.84

6.88-7.60

048

0.51-0.57

1.58-1.74

0.88-0.97

3.41-3.77

5.39-5.96

060

0.43-0.48

1.33-1.47

0.88-0.97

2.78-3.07

5.39-5.96

070

0.35-0.40

1.34-1.54

0.71-081

2.72-3.13

4.27-4.92

09/26/12

Thermistor Resistance

Thermistor

Temperature (°F)

Microprocessor

Resistance (Ohms)

5

72,950

14

55,330

23

42,330

32

32,650

41

25,390

50

19,900

59

15,710

68

12,490

77

10,000

86

8,057

95

6,530

104

5,327

113

4,370

122

3,603

131

2,986

140

2,488

149

2,083

5/1/11

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