Monitor Program Data and Controls
28 Danfoss Turbocor Compressors Inc.
ECD-00007M Rev. 1
6.4 Motor Monitoring
6.4.1 Motor Monitoring Overview
The “Variable Speed Permanent Magnet Motor
Monitoring” window allows the user to:
• View the actual shaft speed, and set the desired shaft
speed
• View motor parameters such as current, voltage, and
power
• View motor faults and alarms
• View the number of energized motor cooling
solenoids
• View the Soft-Start Controller data
To view the “Variable Speed Permanent Magnet Motor
Monitoring” window, select “Window”→ “Motor” from the
menu bar, or click on the “Motor Monitor” icon located
below the menu bar. Table 8 provides a description of the
motor monitoring parameters.
NOTE:
The measurement unit (metric/imperial) displayed depends
on the measurement unit previously set. To verify or change
the measurement unit, refer to section 6.3 "Compressor
Control" on page 23.
IMPORTANT:
To change a parameter setting, double-click the variable
field, scroll or type in the new setting, and press Enter. It is
important to press Enter as this causes the user input to be
validated.
3-Phase Over-Current Fault / Alarm Excessive system load (usually due to compressor pumping liquid).
Note: A “3 Phase Over Current” fault will lock out the compressor.
The compressor will have to be powered down and restarted.
Cavity Temperature Fault / Alarm Insufficient motor cooling
Leaving Water Temp Fault / Alarm Insufficient water flow.
Compression Ratio Fault / Alarm Faulty condenser or insufficient load on the evaporator.
BMC Fault Faulty BMCC
Sensor Fault Faulty sensor or faulty BMCC
SCR Temperature Fault / Alarm Insufficient cooling to the SCR plate
Lock Out Fault If any (or a combination of) the alarms listed below occurs more
than 3 times within 30 minutes, a “Lock Out Fault” occurs:
• Inverter temperature alarm
• Cavity temperature alarm
• SCR temperature alarm
Winding Temperature Fault Motor winding temperature has exceeded 155ºC
Table 7 Compressor Faults and Alarms (Continued)
Fault / Alarm Possible Cause
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