CVHE-SB-32A 89
and the output will go to end of range low. That is, for an out of range low on the sensor, the
output will be limited to 2.0 VDC. For an out of range high on the sensor, the output will be
limited to 2.0 VDC.
As of the 10/21/96 Software Release Including Fastpak and UCP2 Enhancements:
When a Temperature Sensor Only is Used and A Temperature to Pressure Conversion is Made,
or When a Condenser Pressure Sensor is Used (Optional): If the Temperature Sensor (or Con-
denser Pressure sensor) goes out of range due to an open or short, a Temperature Sensor (or
Pressure Sensor) diagnostic will be called and the output will go to end of range low. That is, for an
out of range low on the sensor, the output will be limited to 2.0 VDC. For an out of range high on
the sensor, the output will be limited to 2.0 VDC.
Refrigerant Differential Pressure Indication
The transfer function is 2 to 10 VDC corresponding to the menu entered “Min Delta Pressure
Calibration” setting to the menu entered “Max Delta Pressure Calibration” setting. The Min
Delta Pressure Calibration setting has a range of 0-400 psid (0-2758 kPa) in increments of 1
psid (1 kPa). The Max Delta Pressure Calibration setting has a range of 1-400 psid (7-2758
kPa) in increments of 1 psid (1 kPa). The condenser refrigerant pressure is based on the
Condenser Refrigerant Pressure sensor if the Condenser Pressure Option is selected as
‘Installed’ at the CLD. The condenser refrigerant pressure is based on the Saturated
Condenser Refrigerant Temperature sensor if the Condenser Pressure Option is selected as
‘Not Installed’ at the CLD. The evaporator refrigerant pressure is based on the Saturated
Evaporator Refrigerant Temperature Sensor.
The Percent Condenser Pressure/Refrigerant Differential Pressure Indication Output is
located on the Circuit module at J7-1,2
If the saturated condenser temperature is used to determine condenser pressure, it takes
about 11.5 seconds for UCP2’s % condenser pressure output to respond to a step change in
saturated condenser temperature.
The Percent Condenser Pressure output can source a maximum of 30mA of current.
2 vdc
10 vdc
0 PSIA HPC in PSIA
0 Percent 100 Percent
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