(*) The maintenance inhibit can be set to “Frozen mode” (factory setting), or “Free mode”.
(**) The standard detector alarm output is either No alarm = 4mA or Confirmed alarm = 20mA. Pre-alarm states
(8 / 12/ 16 mA) are available when the detector is in “Service mode”.
6.4. Power and fault indications
A green LED placed in the communication head
flashes (0.5 Hz) in normal mode.
When the device communicates with the TLU, the
flashing frequency increase up to 1Hz.
In case of fault state, its flashing decrease to 0.3Hz