EST3 Installation and Service Manual

Service and troubleshooting

Table 8-40: Addressable analog diagnostic table interpretation

Table Name Description Possible causes

Compatibility Fault Incorrect brand of device installed, replace device.

SIGA, GSX, or XLS brand devices intermixed on circuit.

Problem solving hints

Addressing faults

Most addressing faults are quickly located because the wrong address gives a clue as to the fault location. For example module

164 is duplicated while module 174 is missing. The device at location 174 probably has its tens digit addressing switch off by one position.

Duplicate device faults are harder to locate, e.g. the carpenter put up a partition hiding sensor 53, then the electrician noticed it was missing and spliced in a new base and now there are two sensors at address 53.

To identify devices with duplicate addresses, remove one of the suspected duplicate sensors. The duplicate fault should clear within 30 seconds if the sensor removed is a duplicate.

Disconnect half of the circuit. Allow a minute or so for the circuit to stabilize and the faults to report. Upload the “Ready

Communication” diagnostics table only. The remaining duplicate sensor, 53, should still appear, as if it is physically connected between the circuit controller and the wiring break.

Continue to add or remove segments of the circuit in gradual increments repeating the diagnostics upload until the physical location of the problem detector is located.

Intermittent communication and wiring faults

EST3 counts of the number of communications and errors associated with each device. You can use this information to diagnose problems.

• A message counter tracks the number of communications sent between each device and the 3-AADC1 controller.

• An error counter tracks the number of communications failures occurring between each device and the 3-AADC1 controller

Both counts return to 0 each time the controller is restarted. You can use these To help to isolate a problem, compare the number of messages sent to a specific device to the number sent to a neighboring device of the same type.

Devices are polled each time the system is started, and any time an object reports its status as trouble or alarm. Polling frequency

8.72 EST3 Installation and Service Manual

Service and troubleshooting differs for different objects and circumstances. Pull stations are polled much more frequently than detectors or modules. Devices that report communication failure are polled more often than devices that are not experiencing the failure.

• Devices with high message counts but few errors may be pull stations or devices that change state regularly such as monitor modules.

• Devices that have increased error counts and only marginally increased message counts may indicate wiring or device problems.

• Devices with low message counts and an equal number of errors are non-existent devices.

• All 198 addressed are polled occasionally to identify any devices that may have been installed and not configured.

If the message and error counts are confused because of the length of time the circuit has been running, restarting the panel will cause a restart of the circuit and the zero the counters. You may need to monitor the circuit for twenty minutes or more before a trend in messages becomes apparent. Locating intermittent faults may require extended operating periods.

EST3 Installation and Service Manual 8.73