Service and troubleshooting
8.76 EST3 Installation and Service Manual
x x - - EOL resistor value is too low
x = Applicable
- = Not applicable
Table 8-44: Addressable analog detector troubleshooting
Symptom Possible causes
Detector not responding
correctly
1. Detector installed in wrong location or improperly addressed
2. Detector not entered into system database
3. Incorrect device response in database
Detector in trouble on
CPU/LCD
1. Detector missing or incorrectly wired on circuit
2. ID error. Detector not loaded into 3-AADC1 module
database.
3. Ground Fault on circuit
4. Internal detector fault
Detector incorrectly in alarm
on CPU/LCD
1. Detector extremely dirty
2. Ionization detector Installed in area of extremely high airflow
3. Detector installed in area of high ambient smoke
4. Defective detector
For detailed information on identifying and locating device
problems, refer to topic “Addressable analog diagnostic tools,”
earlier in this chapter.
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