4 Troubleshooting & Maintenance
2
）
If the buzzer is correctly connected, replace the buzzer;
3
）
Replace the control unit if the false alarm issue persists;
4
）
Contact the relevant technical personnel if the above doesn’t solve the problem.
4.1.4 After the self-check, the alarm indicator doesn’t function normally
1
）
Check the cable connection;
2
）
If the connection is perfect, replace the LED indicator;
3
）
Contact the relevant technical personnel if the above doesn’t solve the problem.
4.2 Malfunctions in operations of the device
4.2.1 The remote controller doesn’t work
1
）
Ensure that the battery of the remote controller is fully charged;
2
）
Alternatively, replace the battery;
3
）
Replace the control unit if the above doesn’t help;
4
）
Contact the relevant technical personnel if the above doesn’t solve the problem.
4.2.2 Screen buttons do not function properly
1
）
If you have pressed all the screen buttons yet there is no response, check the control unit to see if there is
anything abnormal;
2
）
If everything is perfectly fine, but the problem persists, replace the control unit;
3
）
Contact the relevant technical personnel if the above doesn’t solve the problem.
4.2.3 Counting error
1
）
Check to see if the infrared sensor is damaged;
