Orion System Full Digital Module - Manual (Page 14)

Full Digital Module
Technical Guide 14
Troubleshooting
OE275-01 Suction Pressure Transducer
Testing for R410A Refrigerant
The Evaporator Coil Temperature is calculated by converting the Suc-
tion Pressure to Temperature. The Suction Pressure is obtained by using
the OE275-01 Suction Pressure Transducer, which is connected into the
Suction Line of the Compressor.
Use the voltage column to check the Suction Pressure Transducer while
connected to the Full Digital Module. Read voltage with a meter set on
DC volts. If the temperature/voltage or pressure/voltage readings do
not align closely with the chart, your Suction Pressure Transducer is
probably defective and will need to be replaced.
See the OE275-01 Suction Pressure Transducer, Pressure, Temperature,
and Voltage Chart for R410A Refrigerant testing (Table 4). The chart
shows a temperature range from 20°F to 80°F. For troubleshooting pur-
poses, the DC Voltage readings are also listed with their corresponding
temperatures and pressures.
Table 4: Coil Pressure/Voltage/Temp for OE275-01
Suction Pressure Transducers - R410A Refrigerant
OE275-01 Suction Pressure Transducer Coil Pressure
– Temperature – Voltage Chart for R410A Refrigerant
T
emperature
°F
Pressure
PSI
Signal
DC V
olts
T
emperature
°F
Pressure
PSI
Signal
DC V
olts
21.19 80.94 1.8 59.03 168.10 3.2
24.49 87.16 1.9 61.17 174.32 3.3
27.80 93.39 2.0 63.19 180.55 3.4
30.99 99.62 2.1 65.21 186.78 3.5
33.89 105.84 2.2 67.23 193.00 3.6
36.80 112.07 2.3 69.24 199.23 3.7
39.71 118.29 2.4 71.15 205.46 3.8
42.30 124.52 2.5 72.95 211.68 3.9
44.85 130.75 2.6 74.76 217.91 4.0
47.39 136.97 2.7 76.57 224.14 4.1
49.94 143.2 2.8 78.37 230.36 4.2
52.23 149.42 2.9 80.18 236.59 4.3
54.50 155.65 3.0
56.76 161.88 3.1