Carrier CA Alarm Codes AL48

Description
Alarm 48 is triggered by an oxygen sensor output voltage less than 15 mv, or greater than 4.1 v. This alarm will remain active until the sensor is in-range. While AL48 is active, the compressor will run with the oxygen solenoid valve (OSV) open, unless AL39 is active, whereby all control units will be disabled, except the sample air solenoid valve (SAV).
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