Bosch D296 - Page 26

26 en | Troubleshooting Long-range beam smoke detectors
2017.03 | 7.0 | F.01U.068.899 Installation manual Bosch Security Systems, Inc.
Red
LED
Yellow
LED
Green
LED
Terminals 4
and 5
Terminals 6
and 7
Condition Solution
Off On Flashing Open Open Trouble. If the
reference voltage is
less than ~2VDC,
dust on the lens
reduced the signal
strength or vibration
misaligned the
receiver.
Clean the
transmitter and
receiver covers.
If the reference
voltage does not
return to
3.8VDC to
4.2VDC, realign
the receiver and
press the Setup
switch.
Off On Flashing Open Open If the reference
voltage is greater
than ~4.2VDC, the
beam strength
increased because an
initial beam
misaligned or a
partial blockage was
removed at setup.
Perform a fine-
tune alignment
of the receiver
and use the
Setup button.
On Off Flashing Closed Closed Alarm Determine the
cause of the
alarm and reset
the receiver.
On Off Flashing Closed Open Alarm. The access
door is missing or
loose.
Determine the
cause of the
alarm and reset
the receiver.
Replace the
access door.
On On On Closed Open Alarm and Trouble. An
alarm occurred, then
the beam was
blocked.
Determine the
cause of the
alarm and reset
the receiver.
Clear the beam
path.