SGNe Troubleshooting Guide Page 28
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
.
High Interstage Pressure
This will occur if the compressor is running, it is a 2 stage unit, and the interstage pres-
sure is above 75 psi.
Initial Check Alarms
The following alarms will only occur when the machine is not running. These alarms
are related to high temperature, power loss, and sensor calibration. They will have the
same display mode as other alarms.
High Airend Disch Temp
Will occur if 2ATT is greater than 95% of 228 degF.
Check Set Points
Will occur if the controller has determined that some of the data stored in memory
contains unacceptable values.
Invalid Calibration
Will occur if the sensor zero value is +/- 10% of its scale. See Sensor Calibration.
Warnings
When a warning occurs, a large question mark will flash on the display screen.
A warning will not cause the unit to shutdown. The unit will continue to run in its normal
operation and the warning will remain displayed until reset, by pressing the RESET
button twice.
If multiple warnings exist, the small up/down arrows will appear in the upper right corner
of the display screen. The multiple warnings can be seen by pressing the UP and DOWN
arrow buttons. Pressing the STATUS button will display the CURRENT STATUS screen
with the WARNING button indicating a warning exists. Warning messages are as follows:
Change Inlet Filter
Will occur if air filter delta-p switch closes while the unit is running and the motor speed
is greater than or equal to the minimum speed.
Change Coolant Filter
Will occur if the coolant filter switch closes for 15 seconds while the unit is running, the
motor speed is greater than or equal to the minimum speed, and the injected coolant
temperature is at least 140 deg F.
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