Monitor Program Data and Controls
44 Danfoss Turbocor Compressors Inc.
ECD-00007M Rev. 1
6.9.4 Compressor Stepper Motor
Settings
Select the “Stepper Motor Controls” tab to view and change
the compressor’s stepper motor settings. Specifically, it
allows the user to view the maximum motor steps and the
initial motor steps at compressor startup. For the electronic
expansion valves, the user may adjust the settings to meet
the application needs.
Table 17 EEPROM Settings - Compressor Controller Fault Limit Parameters
Parameter Description
Discharge Pressure The actual discharge gauge pressure at the compressor flange as
measured by the discharge pressure transducer.
Inverter Temperature Inverter temperature as measured by thermistor mounted under the
IGBT Inverter.
Discharge Temperature The actual discharge temperature at the compressor flange as
measured by the discharge temperature/pressure transducer.
Suction Pressure The actual suction gauge pressure at the compressor flange as
measured by the suction pressure transducer.
Cavity Temperature Temperature of the superheated gas moving past the shaft.
Leaving Temperature Leaving water temperature as measured from the 10K thermistor
connected to the terminals marked “LEAVE” on the Chiller Interface
module.
Total Compression Ratio Ratio of the absolute discharge pressure and the absolute suction
pressure.
Current Draw - Amps 3-phase mains input current.
SCR Temperature Temperature of the SCR heat sink plate.
Anti Start Temperature Temperature limit at which the compressor will start up. If the inverter
temperature, cavity temperature, or SCR temperature exceeds the
anti-start temperature, then the compressor will not start up until the
temperature has been reduced.
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