Monitor Program Data and Controls
30 Danfoss Turbocor Compressors Inc.
ECD-00007M Rev. 1
6.4.2 Motor Faults / Alarms
This section describes the possible faults displayed in the
“Variable Speed Permanent Magnet Motor Monitoring”
window. Table 9 provides a description of the possible
cause of the fault/alarm. If a fault or alarm occurs, refer to
the Troubleshooting Manual for the appropriate
procedure(s) to follow.
Fault Text Box Displays the motor’s most recent active fault.
Refer to 6.4.2 "Motor Faults / Alarms" for alarm details.
Alarm Text Box Displays the motor’s most recent active alarm.
Refer to 6.4.2 "Motor Faults / Alarms" for fault details.
Motor Cooling:
Number of solenoids energized Indicates the number of motor-cooling solenoids that are open.
Soft Start Data:
Three-Phase Mains Voltage Calculated three phase mains voltage.
Three-Phase Current Calculated three phase mains current.
DC Bus Regulation Percentage of maximum DC Bus output voltage.
DC Bus Voltage DC Bus Voltage as measured at the inverter
Graph: Amps Id & Iq Graphical representation of the torque-generating current (Id) and the
flux-generating current (Iq) versus time.
Under normal conditions, when the motor is driving, Iq should
decrease to at least -1 during compressor start-up, and the “Amps - Id
& Iq” graph should look like:
The turquoise line represents Id, and the red line represents Iq.
Notice that the red line (Iq) dips to negative values. If Iq does not
decrease to negative values during compressor start-up, then there is
no motor drive.
Id should stabilize towards the torque value;
Iq should stabilize towards zero at medium motor speeds, and
increase with positive values at high motor speeds.
Table 8 Motor Monitoring Parameters (Continued)
Parameter Description
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