Possible reason: if there is a short circuit in the floor or room number, and whether the wiring is correct or not. Host failureProcessing method: check the floor and room number line is short, there is no extension of the floor and room number line. The same floor and room number wiring is correct.Replacement of the same type of host test.
Date:
2016
-
08
-
12
Views：5
Possible reasons: such as intercom normal, may be the No. 4 line break. Host failure. Processing method: check the host to the extension of the 4 main line is broken, the replacement of the same type of host test.
Date:
2016
-
08
-
12
Views：7
Possible reasons: main line 2 lines are short circuit or broken, or host failure. Processing method: check the host machine to the extension of the 2 lines are short circuit or broken, the replacement of the same type of host test.
Date:
2016
-
08
-
12
Views：10
Possible reasons: the host to the extension of the main line 1 short circuit or fault.Processing method: check the host to the extension of the 1 line is short circuit or broken. Replacement of the same type of extension and host test.
Date:
2016
-
08
-
12
Views：8
Possible reasons: L+.L- sewing are short or broken, or lock.Treatment methods: check the host to the signal line lock L+, L- is short circuited or broken, the lock is flexible.
Date:
2016
-
08
-
12
Views：7
Possible reasons: the host does not have power to.Processing method: if the red light does not shine, check whether the 220V power supply power supply box, and the fuse is burnt out.If the green indicator light is not bright, check the power supply 12V output is short circuit, or replace the power box test.
Date:
2016
-
08
-
12
Views：7