SGNe Troubleshooting Guide Page 21
Revision 1.0; Davidson, May 2009. ©Ingersoll Rand Proprietary Information
SGNe
Troubleshooting Guide
Danger
Please utilize extreme caution when performing work within the compressor cabinet.
When opening the cabinet: be certain to wear appropriate PPE (Personal Protective Equipment),
follow lock out-tag out procedures, and ensure all safety procedures are followed
.
Energy Cost
Displays the energy cost of the compressor for the time period that was started by
selecting the reset averaging set point. This is calculated by multipling the kW hours
of
the motor and the blower by the energy rate.
Energy Savings
Displays the energy savings of the compressor for the time period that was started by
selecting the reset averaging set point as compared to a conventional compressor.
This value is determined by calculating how much a conventional compressor motor
would cost to operate at the same average capacity and then subtracting the motor en-
ergy cost of the Nirvana compressor from it.
It is assumed that the blower cost is the
same in both packages.
Lifetime Energy Savings
Displays the lifetime energy savings of the compressor at the existing energy rate and
at the average percent capacity as compared to a conventional compressor.
Compressor Operation
Initial Check Sequence
The controller will perform an initial check sequence if the compressor (1) receives ini-
tial power to the controller or (2) has experienced an alarm reset. While the initial
check sequence occurs, the controller will display a “Checking Machine” message.
During the initial check sequence, the controller will purge its memory buffer of false or
alarm related data and replenish it with new readings from all sensors. During this time,
if a sensor is found inoperative and is required for a shutdown, a sensor failure (alarm)
will occur. In addition to the sensor update, sensors 2ATT, 4ATT, and 2CTT will also
be checked for correct temperature readouts. If sensor 2ATT’s measured value is
greater than 95% of its maximum value, the controller will issue an alarm and not allow
the unit to start.
During the initial check sequence, the Intellisys will transmit initialization set-
tings to the VSD.
Once the sensors are checked and the drive is initialized, the controller will then check
all warnings. After completion of the initial check sequence, the controller will then dis-
play “READY TO START”. This process should be completed within 5 seconds.
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