Shenzhen Xin: Fire alarm system failures
Shenzhen Xinxin Answers Common Faults of Fire Alarm System
1. Why did the alarm bell and the audible and visual alarm fail to act after the fire was reported?
Possible reasons are:
a. The “Voice Link” on the panel of the host computer is not turned on (the “Voice Link” indicator is not on).
Processing method: open the panel control permission, press the “Voice Link” button once, and “Voice Link” turns on (the “Voice Link” indicator lights up).
b. There is fault information of the linked alarm or audible and visual alarm on the host.
Treatment method: Troubleshoot information, check whether the code of the alarm control module or intelligent acousto-optic alarm is correct, and whether the wiring is loose.
c. DC 24V power is not supplied to the corresponding alarm or audible and visual alarms.
Treatment method: Check whether the 24V DC power is supplied to the corresponding alarm or audible and visual alarm. Connect the DC 24V power cable as required and turn on the DC 24V.
d. The type of the output module of the alarm bell is not set to be a far-sound or audible and visual alarm.
Processing method: Set the type of the output module that controls the alarm bell to a remote sound or audible and visual alarm.
e. There is no alarm output associated with the alarm or audible and visual alarm in the linkage setting.
Processing method: Set the corresponding linkage relationship in the linkage setting, and the target points to the alarm bell or sound and light alarm.
2. After the fire was reported, why didn't any equipment request action?
Possible reasons are:
a. The “General Linkage” on the panel of the host panel is not open (the “General Linkage” LED is not lit).
Processing method: open the panel control authority, press the "general linkage" button, "general linkage" open ("general linkage" indicator light).
b. There is no linkage setting data in the linkage setting, or the “registration” item in the linkage data is not selected.
Processing method: Enter the linkage setting item of the host, set the linkage relationship according to security, and select the "registration" item.
3, after the report of the fire, why the multi-line linkage module on the host does not have any linkage request or action?
The multi-line linkage module on the mainframe is generally used to control the more important fire-fighting equipment. In order to prevent misoperation, there are multiple protection measures. In addition to being controlled by the "general linkage" switch, automatic linkage is also controlled by the "disable/enable" lock control switch and the "manual/automatic" lock control switch on the host. In the “disabled” state, no operation can start the multi-line module; only the “permitted” and “automatic” states respond to the host's action request. The multi-line module can be started and stopped manually either in the "manual" or "automatic" state. At the same time, it should also check whether the corresponding linkage relationship is set correctly.
4. After the fire was reported, there was a device requesting action, but why didn't the field device act?
The feedback signal of the device needs to be returned by the control and monitoring module. Possible reasons are:
a. The status of the field device does not have an automatic status because it is not controlled by the module and it does not start.
Treatment method: Place the equipment in the automatic state.
b. The device has started, but the device feedback signal line is dropped. Check the device feedback signal cable and connect the cable.
5. Why does a certain circuit fail to report a fault or feedback, and then it automatically disappears?
Possible reasons are:
a. The insulation of the loop signal line to the ground is not good, and the insulation resistance to ground is less than 3 MΩ.
Treatment method: check the line.
b. The resistance of a device to ground is less than 3MΩ.
Treatment method: check the line.
c. There are individual devices in the entire loop because the leakage current is too large, and lightning damage damages the loop current.
Treatment method: Check out the damaged equipment and replace it. You can use the method of segmentation to find the fault.
d. A common detector or other manufacturer's equipment is incorrectly installed on the circuit and causes a current draw.
Treatment method: Check the equipment and remove the equipment that was installed incorrectly.
e. There are strong interference signals on the circuit, such as the signal line and the strong electric circuit, and the strong magnetic field nearby.
Treatment method: Reroute the cable, separate it from the strong line or avoid the interference source.
f. A short circuit between the return line and the slot in the plane layer.
Treatment method: check the line.
6. Why does a loop alarm only work once in a chain and can't the fire alarm or feedback be reported?
Such problems are usually caused by a short-circuit between the detector/module circuit and the output of the control module. When the module is not operating, the circuit communication seems to be very normal. When the module is activated, the circuit is affected. Therefore, the device is affected. A moving circuit can no longer report a fire. Treatment method: Check the line and connect the line as required.
7. Why does the host not only report the main power failure but also report the power failure?
Possible reasons are:
a. The host power feedback cable is not connected or damaged. Remedy: Reconnect the host power feedback cable or replace the host power feedback cable.
b. The type of power feedback set in the “Power Settings” menu of the main unit does not match the feedback type of the actually used power supply. Solution: Enter the "Power Settings" option under the "System Settings" menu of the host to set the parameters correctly.
8. Why does the printer play some garbled characters when the alarm occurs?
The host system can set up a variety of printers and their communication parameters. The possible causes for printing garbled characters are:
a. The printer type that is set does not match the type of printer that is configured. For example, it is a stylus printer when set to 01 Printer, and a thermal printer when it is set to 02 Printer. Processing method: Enter the "Printer Settings" option under the "System Settings" menu of the host to correctly set the parameters.
b. The printer's communication speed setting is incorrect. Usually, the speed of the dot matrix printer is 2400 BPS, and that of the thermal printer is 9600 BPS. Processing method: Enter the "Printer Settings" option under the "System Settings" menu of the host to correctly set the parameters. The printer's communication speed can be obtained by printing the self-test (operation: press the left button first to turn off the printer power indicator, then press the right button and press the left button immediately, the printer starts the self-test. The self-test prints The result is the current communication speed used by the printer.) If the self-tested rate does not match the rate set by the host, change it through the printer's own dip switch or jumper.
9. When two or more hosts are connected to a network, why host 2 can receive alarm information from host 1, but host 1 cannot receive data from host 2?
When the host is connected to the network, the master-slave networking mode is adopted, that is, the host computer is the host computer in the networked machine, and the other hosts are the slaves. However, after the host computer number is registered, the alarm information generated by the local machine can be transmitted through the network cable. Give each other. No. 2 function can receive the alarm information of No. 1 machine, indicating that the network line has been connected, and No. 1 machine has registered No. 2 host in the networking setting; No. 1 machine can not receive the alarm information of No. 2 host, but can only indicate No. 2 The host did not register host 1 Processing method: Enter the "Network Settings" option under the "System Settings" menu of the host computer, correctly set "Local Number", "Transmission Rate" and register all hosts in the network.
10. What is the reason why the host reports XX circuit board XX circuit fault?
When the host circuit is short-circuited, grounded or open circuit fault, the host will automatically report “XX circuit board XX circuit short circuit fault”. Specifically, whether the circuit is short-circuited, grounded, or open-circuited, can be determined by viewing the instructions on the internal interface board. There are four indicator lights on the interface board. Under normal circumstances, a green light is always the power indicator, and a red light is shining. For CAN communication indication, the two yellow lights are the line fault indications of the first and second loops respectively (the line is always on when the line is short-circuited or grounded).
Treatment method: Check the loop circuit is short circuit, ground or open circuit.
11. Which fault can be isolated and which faults cannot be isolated?
Pressing the “Isolation” key on the panel can isolate all detectors and modules that are alarming (fire alarm, request/feedback, fault) on all networked hosts; only any detectors of this unit can be isolated in the detector/module setup menu. Module. Isolation does not isolate the host from system failures such as: host communication failure, host power failure, interface board communication or loop failure, printer failure, replay disk failure, etc.
12. Why does the host fail to report a fire alarm and fail to report a fault, but the detector and module inspection lights are still blinking?
The sub-phenomenon is mostly interference signal on the line. If the signal line is connected to the ceiling metal but not grounded, you can use the “single-point test” function in the “operation” menu to see the related parameters of the single-point device. Treatment method: disconnect the line, a period of access
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