Compressor and thermistor resistance, Refrigerant circuit guideline, Versatec base series installation manual – WaterFurnace Versatec Base User Manual
Page 45: Compressor resistance, Thermistor resistance
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