SGNe Troubleshooting Guide Page 18
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
.
Proportional Gain
This set point is sent to the VSD when it is changed.
This is used for the PID proportional gain.
Integral Gain
This set point is sent to the VSD when it is changed.
This is used for the PID integral
gain.
Derivative Gain
This set point is sent to the VSD when it is changed.
This is used for the PID derivative
gain.
Maximum Speed
This set point is sent to the VSD when the target pressure is changed. This set point
can be used to override the maximum speed for the VSD as set by the target pressure.
This is the maximum speed the motor will operate at after it has started. The speed of
the motor will not exceed this value during operation.
Minimum Speed
This set point, is sent to the VSD when the target pressure is changed. This set point
can be used to override the minimum speed for the VSD as set by the target pressure.
This is the minimum speed the motor will operate at after it has started.
Skip Speed Point
This set point is used for setting the mid-point of a speed band that the VSD will skip
over. This value will be positive for single stage compressors and will be negative for
2 stage compressors. Single stage unit rotate in a clockwise direction and provide a
positive speed feedback. Two stage units rotate in a anticlockwise direction and provide
a
negative speed feedback.
Skip Speed Band
This set point is used for setting the bandwidth of the skip speed range. The VSD will
skip any speeds within this range.
Fixed Speed Control
If this is set to On, the compressor will only run at the slowest speed of maximum
pressure (145 psi or 203 psi) . When this is turned Off, the compressor will automatically
return to VSD operation. If fixed speed control is not turned off by IR service, it will
automatically set itself to Off after 10 minutes of operation
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