Section 5 – SR-2 Diagnostics
12 SENSOR SHUTDOWN
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Alarm Type
Check or Shutdown Alarm
Associated Alarm
Codes
Alarm Code 03
Alarm Code 203
Alarm Code 04
Alarm Code 204
Component Description and Location
See Alarm Codes indicated above.
Circuit Description
See Alarm Codes indicated above.
How Alarm is Set
Fresh Setpoints
Both return and discharge sensors have failed or have been disabled by the dual sensor alarm control. With a
fresh range setpoint the alarm is set as a shutdown alarm.
Frozen Setpoints
Both return and discharge sensors have failed or have been disabled by the dual sensor alarm control. With a
frozen range setpoint the alarm is set as a check alarm. The unit will be forced into continuous low speed cool.
How Alarm is Cleared
This alarm is cleared manually. The associated sensor alarm code must cleared before Alarm Code 12 can be
cleared.
Diagnostic Procedure
Determine which sensor Alarm Codes (03, 203, 04 or 204) are present. Proceed as shown for that alarm code.
5-23
02 February 2005
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