Section 5 – SR-2 Diagnostics
92 SENSOR GRADES NOT SET
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Alarm Type
Check Alarm
Associated Alarm
Codes
Alarm Codes 03, 04, 203, and 204 sensor alarm codes for graded sensors
Alarm Code 12 Sensor Shutdown
How Alarm is Set
Any graded sensor (return, discharge or spare sensor) is in valid range and is set to grade 5H (default) when unit
power switch is turned on.
How Alarm is Cleared
Clears automatically when the sensor grade is set to other than 5H.
Considerations
The sensor grade must be set using the Sensor Calibration feature in the Guarded Access Menu. If the sensor
grade is not properly set the sensor reading will not be accurate. Grade 5H is set as the default grade on factory
microprocessors and is used as an indication that the sensor grade has not been set.
Diagnostic Procedure
1. Verify actual sensor grades for all graded sensors.
2. Using this information, calibrate the sensors using the Sensor Calibration feature in the Guarded Access
Menu. See Service Procedure A15A in Section 6 of this manual for details.
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02 February 2005
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