118
No.
Fault
Causes
Actions
11
Speaker Line xx - Open
Some loudspeakers on the
speaker line are disconnected
or not calibrated.
Please check the connection
of loudspeakers on the
speaker line. If no issue is
found, please calibrate the
device.
12
Speaker Line xx - Short
The speaker line has shorted,
is overloaded, or not
calibrated.
Please check the connection
of loudspeakers on the
speaker line. If no issue is
found, please calibrate the
device.
13
Speaker Line xx - Earth
The impedance between
speaker line and the ground is
lower than the threshold.
Please check the speaker
line; fix the earth points.
14
Contact Input xx -Open
The wiring of the contact input
is open or disconnected.
Please check the wiring of
contact input.
15
Contact Input xx - Short
The wiring of the contact input
is shorted.
Please check the wiring of
contact input.
16
Fire Alarm Interface (RS-
485)
The possible reasons are:
- The connection between
MCU and LPI-ModBus module
is short, open or reversed.
- The connection between LPI-
ModBus module and fire alarm
control panel is faulty.
- No power supply to LPI-
ModBus module.
- Mistakes in configuration
Please check the connection
from fire alarm control panel
to MCU, the power supply of
LPI-ModBus module and the
related configuration.
If you don’t use the fire alarm
interface, please disable its
supervision.
17
Network
The possible reasons are:
- No connection or wrong
connection from device to
MCU.
- Device is powered off.
- No end-of-line resistor is
connected to the
communication bus.
Please check the connection
of the communication bus and
make sure the last device is
connected to an end-of-line
resistor.
Please check the power
status of all the devices on
the communication bus.
