Section 5 – SR-2 Diagnostics
02 CHECK EVAPORATOR COIL SENSOR
Page 2 of 2
Diagnostic Procedure
Download and review the ServiceWatch data logger using Technician Level to determine the conditions at the time
the alarm was set.
Alarm Code 02 (Sensor was out of range) Only
1. Display the sensor reading using the Sensor Menu. If the display shows [----], the sensor is defective and
should be replaced. If the condition still exists, check the sensor circuit for an open wire or short to ground.
See Service Procedure D01A. Check the microprocessor using Service Procedure A01A.
2. If the display is normal proceed as shown below.
Alarm Code 02 and Alarm Code 13 (Sensor was reading erratically)
1. Review the ServiceWatch data logger and check the senor reading at the time the alarm was set. Also
review the history to see if previous alarm codes exist that would indicate an intermittent problem. If the
sensor appears to have read incorrectly, it should be replaced.
2. If the problem reoccurs, check the sensor connector as shown in Service Procedure D01A.
3. Check the sensor circuit as shown in Service Procedure D01A.
If all the Sensor Codes (02, 03, 04, 05, 06, 11 and 12, 203, & 204) are set
1. Be sure the 35 pin microprocessor sensor connector J3 is connected securely.
2. Check the microprocessor, as shown by Service Procedure A01A.
5-10
02 February 2005
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