Viper Service Manual
Publication Number: 621260373SER
- 40 -
© 2008-2016, Cornelius Inc.
Pressure Sensors
Pressure sensors allow the technician to view the high and low-side pressures in the refrigeration system without
having to connect external gauges to the system. To view this information, go to the Unit Data screen shown in
Figure 15. and press the UNIT button. The System screen, shown in Figure 35., is displayed.
The number and type of sensors in the unit are typically set at the factory and should not be changed. Data is only
available on the sensors installed. If a sensor that is not installed in the unit is activated, incorrect data is displayed.
It is possible to install sensors in the field, but it is not recommended because system refrigerant charge may be lost.
The low side pressure sensor is used to monitor compressor reversal. If it is not installed on the unit, the unit may
not operate properly.
SYSTEM
12:51P
MAR 04
# OF BARRELS 2
# OF COMPRESSOR 1
BACK NONE LOW HIGH BOTH
SECURITY OFF
CMP #1 SENSORS BOTH
Figure 35. System Screen
When the pressure sensors selection is highlighted, pressing the NONE button removes the pressure readings from
the Unit Data screen, shown in Figure 36.. If LOW is selected, only the low pressure reading is displayed. If HIGH is
selected, only the high pressure reading is displayed.
NOTE: If a pressure sensor is open, the pressure reading is 386 PSIG.
Figure 36. Unit Data Screen
UNIT
12:51P
MAR 04
LINE VOLTAGE: 229
LINE FREQUENCY: 60
LOW PSIG #1: 60
HIGH PSIG #1: 174
DATA
BACK BRL
UNIT
VER
