Dual Zone Digital Location Control Unit Installation and Operation Manual
22
Configuring parity
Press SELECT to scroll through the available options, and then press SET to
confirm the selection.
PARITY:
EVEN
Available options: Odd, Even, None.
The selected parity must match that of the Modbus equipment that you are
connecting to.
Restoring the factory default settings
To delete the current configuration and restore the factory default settings, press
and hold SET and SELECT at the same time for 10 seconds. The screen returns
to the first configuration menu option.
OPERATING MODE:
INDEPENDENT
Diagnostics information
If the status of the LHD system changes (due to a fire or fault condition)
information is displayed on the LCD.
Alarm condition
If the sensor cable detects a fire in either zone:
• The corresponding zone alarm LED on the front panel illuminates
• An audible buzzer activates
• The corresponding zone alarm relay activates
• The LCD displays the location of the alarm (by distance along the sensor
cable).
The displayed location alternates between metres (M) and feet (FT). The
distance is measured from the start of the sensor cable and does not include any
interposing cable lengths.
ZONE 1: 534M
ZONE 2: OK
ZONE 1: 1751FT
ZONE 2: OK
Press SELECT to silence the buzzer.
Note:
An alarm condition short circuits the sensor cable and the system can only
be returned to normal status when the short circuit section of sensor cable has
been identified and repaired.
