Check code |
| Check code name | Possible causes |
|
|
| |
[L20] | Duplication of central control address | Central control address is duplicated. | |
(New code) |
|
|
|
|
|
|
|
Are U3/U4 |
| NO |
|
communication |
| ||
cables connected | Correct cable connection. | |
| ||
normally? |
| |
| YES |
|
|
| |
|
|
|
When a unit
connected to U3/U4 NO is in a group, is it set
to header unit?
YES
Check and correct I/U address, central control address.
Set the connected unit to header unit.
| Check code |
| Check code name | Possible causes | |
|
|
|
|
|
|
| [L30] |
| I/U external interlock | When an external alarm is input | |
| (New code) |
|
|
|
|
|
|
|
|
|
|
| Is external device | NO |
|
| |
|
| Check I/U boards. | |||
| connected to CN80? |
|
| → Replace defective board. | |
| YES |
|
|
| |
|
|
|
| ||
|
| NO |
|
| |
| Is external device |
| Check external device. | ||
| working normally? |
|
| → Replace it if necessary. | |
| YES |
|
|
| |
|
|
|
| ||
|
|
|
|
| |
| Check possible error |
|
|
| |
| causes. |
|
|
| |
|
|
|
|
|
|
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