Apollo 55000-268 User manual

INTELLIGENT REFLECTIVE BEAM DETECTOR
INSTALLATION GUIDE
Apollo Fire Detectors, 36 Brookside Road, Havant, Hampshire, PO9 1JR England
www.apollo-fire.co.uk
PP2146/2003/Issue 1
FIRE DETECTORS LIMITED
Part no 55000-268 (5–50 metres)
55000-273 (50–100 metres)
©

2
INTELLIGENT REFLECTIVE BEAM DETECTOR
GENERAL INFORMATION
Description of the reflective beam detector 4
How does a beam detector work? 4
Automatic reset 4
Drift compensation 4
SYSTEM DESIGN
Positioning reflective beam detectors 5
Spacing 5
Height 6
Pitched roofs and sloping ceilings 6
How many reflective beam detectors can be connected to a loop? 7
INSTALLING BEAM DETECTORS
General 7
Setting the obscuration level 7
Setting the address 9
Fitting the reflective beam detector 10
TARGETING, ALIGNING AND COMMISSIONING THE REFLECTIVE BEAM DETECTOR
What is ‘targeting’ and ‘aligning’? 11
Panning and tilting 11
Targeting explained 12
Targeting step by step 13
Alignment explained 14
Aligning step by step 14
Stabilisation and testing 16
Reflector test 16
COMMISSIONING
Analogue values 17
Alarm test 18
PROTOCOL DATA AND FAULT INDICATION
Input/Output bits 19
Type Code 19
LED fault indication 19
TROUBLESHOOTING
Fault finding 20
Spare parts 21
Technical Data 21

3
Read this installation guide because…
beam detectors are different from point detectors
beam detectors need to be aligned, not just installed
all engineers need to understand the alignment process
by following the advice in this guide you will avoid problems and repeated site vists
Read the guide through once in order to understand the steps needed to install and align
correctly. Keep the guide handy to refer to during installation. If you need further advice
or help phone, fax or email the Technical Sales Department at Apollo Fire Detectors.
Phone [phone]
Fax [phone]
Email techsales@apollo-fire.co.uk

4
GENERAL INFORMATION
Description of the reflective beam detector
The intelligent reflective beam detector is a
single unit comprising a transmitter, a receiver
and control electronics. In traditional beam
detectors these three elements are supplied as
separate units.
The transmitter projects a cone shaped beam of
modulated infra-red light to a reflector (prisms).
The reflector returns the beam to the detector
where the receiver measures the amount of light
receivedand convertsitto a signalforprocessing
in the control electronics.
The reflective beam detector is mounted so that
the beam will project approximately 0.3m to
0.6m below and parallel to the roof or ceiling
level (assuming that there are no obstructions)
at distances up to 50 or 100m, depending on the
model of detector. The maximum lateral detec-
tion range is 7.5m either side of the beam.
The reflective beam detector is available in two
versions: one, part no 55000-268, is for use at
distances up to 50m, and requires one reflector.
Part no 55000-273 is for distances between 50m
and 100m and requires four reflectors arranged
as a square.
The reflective beam detector is loop-powered
and incorporates a bi-directional short circuit
isolator which switches the negative line in the
event of a short circuit.
How does a beam detector work?
Innormaloperatingconditionsthestrengthofthe
light received is almost the same as the strength
ofthe light emitted.Whensmokeispresentinthe
beam path the light registered by the receiver
is reduced by an amount dependent on the
density of the smoke.
In the event of the smoke obscuring the light by
a pre-selected minimum level for a period of
8 to 10 seconds a fire signal is generated. The
detection level can be set to 25%, 35% or 50%
tosuitdifferentenvironments,examples of which
are given in the table in the section 'Obscuration
Level Setting' on page 7.
If theinfra-red beamisobscuredrapidlyby90%or
moreforapproximately10secondsa faultcondi-
tion is signalled. This condition normally indicates
an object being placed in the beam path. It
might also indicate loss of the reflector.
Automatic reset
The reflective beam detector automatically re-
sets once an alarm or fault condition is no longer
present. A normal status value is returned after
30 seconds following an alarm and 3 seconds
following a fault.
Drift compensation
Over a period of time the light registered by the
receivermightbe reduced byfactors suchasdirt
building up on the lenses of the detector.
The intelligent reflective beam detector com-
pensatesfor thisautomatically inordertoreduce
the likelihood of nuisance alarms. At the limit of
compensation the beam detector transmits a
fault signal. In the event of a fire being detected
when the beam detector has reached its com-
pensation limit, the fire signal will override the
fault signal.
Ensure that the design and
installation is in accord-
ance with the relevant
nationalorlocalfireprotec-
tionstandardor installation
code of practice
15m over 15m
7.5m 7.5m 0.5m
min
beam to wall
distance=
0.5m to 7.5m
max = 40m
Fig 1 Positioning detectors under flat ceilings—
examples of two building widths
!

5
Spacing
The maximum spacing between the axes of ad-
jacent beam detectors is typically 15m for satis-
factory detection under flat ceilings, providing
a maximum total area coverage of 1500 square
metres (15m x 100m).
The minimum spacing between the axes of ad-
jacent detectors is expressed by the following
equation:
S≥L x 0.0875
where S is the spacing and L is the distance
between the detector and the reflector.
The following table is based on this equation.
SYSTEM DESIGN
Positioning reflective beam detectors
The intelligent reflective beam detector must be
positioned correctly to minimise the detection
time. The detection time depends on
—thelocationofthebeamdetectorwithinthe
protected area
—the volume of smoke produced
—the construction of the roof
—the ventilation arrangements
When deciding where to install the beam detec-
tor and the reflector, you need to think of the
construction ofthesurfaceyouarefittingittoand
to possible changes as a result, for example, of
changing seasons. These surfaces must be solid
and should not be subject to movement.
Particular areas where beam detectors should
not be fitted include:
• spaces where the detector is subject to
very high levels of ambient light in normal
conditions
• areas where excessive amounts of dust,
smoke or water vapour are present as part
of the normal environment
• areas where temperature changes rap-
idly
• surfaces subject to vibrationor movement,
such as cladding or purlins
• buildings inwhich it is not possible tomount
the beam detector rigidly or align it cor-
rectly
Ensure that spacing complies with the locally
applicable code or standard.
Distance (m) Minimum spacing
between devices (m)
50.44
10 0.87
15 1.31
20 1.75
25 2.19
30 2.62
35 3.06
40 3.50
45 3.94
50 4.37
55 4.81
60 5.25
65 5.69
70 6.12
75 6.56
80 7.00
85 7.44
90 7.87
95 8.31
100 8.75
Table 1 Minimum spacing between detectors

6
Height
The maximum recommended installationheight
is generally 25m (some local standards or codes
of practice might allow more under certain
circumstances) and the distance between the
beam and the ceiling should be within 0.3m
and 0.6m. No more than 3m of the beam path
(measured from the centre of the beam) should
be within 500mm of any wall or partitions.
If detectors are installed at a distance of more
than 600mm below ceiling level in order to
provide supplementary detection of smoke in a
building with a high ceiling, the installed height
of detectors should be in accordance with the
local code.
Pitched roofs and sloping ceilings
In buildings with pitched roofs or ceilings the
maximum distance either side of the beam in
the apex only may be increased by 1% for each
degree of ceiling pitch up to a maximum of 25%
(Fig 2).
Example: Roof pitch = 20°
Span of beam = 15m
15m + (15 x 20%) = 18m
There must be a clear line of sight between
the beam detector and reflector at all times. If
thereis anydoubtabout thecorrectmountingof
detectors in a particular installation, the position
may be determined by smoke tests.
Reflections from objects other than the prism
reflectors may cause false alarms. Observe the
rulesonminimum spacingas givenon page5.All
installations must conform to locally applicable
standards and codes of practice.
10˚
7.5m 7.5+8.25m 8.25+7.5m
20˚
18m max
7.5 + 7.5 + 3.m
Roof pitch = 20˚
Span of beam = 15m
15m + (15 x 20%) = 18m
Fig 2 Positioning detectors under different types of sloped or pitched roofs

7
How many reflective beam detectors can be
connected to a loop?
Although the reflective beam detector is loop
powered, the totalcurrentdrawnis considerably
higher than a standard point detector. For this
reason care must be taken when designing an
analogue loop, bearing in mind the effects of
voltage drop—a consequence of loop cable
resistance,deviceloadingandfire control panel
specification.
Each reflective beam detector draws approxi-
mately9mAfromtheanalogueaddressableloop
and, unless proven by calculation*, it is recom-
mendedthatnotmorethanten beam detectors
be powered from each loop.
The reflective beam detector is fitted with a
negative bi-directional short circuit isolator. For
details of these please refer to Apollo PIN sheet
PP2090.
*Depending upon the type of panel used, the
resistanceofcableandthe totalloopload,it may
bepossible toinstall in excess of10 beam detec-
tors on a single analogue addressable loop. A
mathematical calculation to assess the worst
case loop voltage drop
should be performed
prior to installation in
order to prove the in-
tended design. A loop
voltage drop calcula-
tion program, known as
‘Loop Calculator’, has
been developed by
Apollofor usebysystem
designers and is avail-
able as a free down-
load from the Apollo
website (www.apollo-
fire.co.uk).
INSTALLING BEAM DETECTORS
General
Position the beam detector to give good access
for alignment and servicing.
Set sensitivity (obscuration level) and address
before making electrical connections. Route
cables away from other electrical cables and
switchgear.
Switch reflective beam detectors to ‘operating
mode’(modeswitchonthe backofthe detector)
before they are connected to the loop to avoid
excessive current draw on the loop.
Setting the obscuration level
Set the beam detector to one of the three ob-
scuration levels shown in Table 2 below. This is
done with DIL switches 3 and 4 on the back of
the detector (Fig 3).
To alter the obscuration level while power is ap-
plied change the beam detector to ‘alignment
mode’ before altering the DIL switch setting.
Change it back to ‘operating mode’ after-
wards.
Obscuration level in % Typical application DIL switch segments
1 2 3 4
25 Offices, small premises,
non-smoking clean
areas, eg, museums,
theatres XXONOFF
35 (Default setting) Factories, warehouses XXOFFON
50 Hostile environments
only, eg, mills, foun-
dries XXOFFOFF
12 Do not use. Possible future require-
ment. X X ON ON
Table 2 Obscuration levels

8
OPERATING MODE
ALIGNMENT MODE
PRISM TARGETING
MODE SWITCH
ON
OFF
ON
OFF
12% THRESHOLD
25% THRESHOLD
35% THRESHOLD
SENSITIVITY
50% THRESHOLD
OFF
XX
X
X
X
X
ON
ON
X
2
X
1
OFF
34
61
ON
432 5 87
XXXX-XXXX
_ o
N
ADDRESS
32 2184 16
21
ON
43 65
X 64
87
21
ON
43
ADDRESS
REFER TO APOLLO
PUBLICATION PP2146
32
+
L2 OUT
LOOP
CONNECTOR
DIAGNOSTICS
L1 IN L2 IN
-
+
2
L1 OUT
-
184 16
21
ON
43 65
X 64
87
Part No. 55000-XXXAPO
Intelligent
DO NOT
REMOVE
LABEL
Reflective Beam
Detector (XXm)
Range X-XX metres
Refer to Apollo
publication :
PP2146
EN54-12:2002
Apollo Fire Detectors Ltd.
PO9 1JR, England
FIRE DETECTORS LIMITED
Fig 3 Rear view of intelligent reflective beam detector
switches
-

9
Setting the address
Theaddress of thebeamdetector issetusing the
DIL switch. The first seven segments of the switch
are set to ‘0’ or ‘1’ using a small screwdriver or
similar tool. The eighth segment is not used.
A complete list of address settings is shown be-
low.
= Switch
Position
0101101
Address 90 =
Example:
0
11 2 4 8 16 32 64
A
ddress
1
not used
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
91
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
Table 3 DIL switch address settings

10
Fitting the reflective beam detector
Remove the detector housing before installation
to prevent it becoming dislodged during the in-
stallation process.
Position the beam and reflectors on solid struc-
turesat between0.3and0.6metresbelowceiling
level. The correct number of reflectors (prisms)
shouldbemounteddirectlyoppositetoandfac-
ing the beam detector. Do not install reflectors
on glass or other reflecting surfaces.
Ensure that there is a clear line of sight to the
detector, taking care that no moving objects
i.e. doors, mechanical lifting equipment etc, will
interfere with the beam path.
Using the template provided mark the 4 fixing
points on the structure and drill holes. The rear
mounting plate of the beam detector assembly
has4 keyhole apertures toalloweasyinstallation
onto the 4 fixing points.
Connect the loop wiring to the terminal block at
the back of the beam detector (Fig 5). The small
2-pin connectorontheleft is notused.Thebeam
detectorispolaritysensitiveandwill operateonly
if wired correctly.
Secure the beam detector assembly to the fixing
points and replace the housing.
Loop in/out
+ – + –
Fig 5 Loop connection diagram
Fig 4 Reflectors for 50m reflective beam
detector (left) and 100m detector

11
TARGETING, ALIGNING AND COMMISSIONING
THE REFLECTIVE BEAM DETECTOR
What is ‘targeting’ and ‘aligning’?
The reflective beam detector will work only if
the beam of light hits the reflector and returns to
the receiver. The best possible result is achieved
if the centre of the beam hits the centre of the
reflector.
In order to achieve this result the beam detector
is adjusted in two stages called ‘targeting’ and
‘aligning’.
Panning and tilting
To carry out the targeting and aligning process
the reflective beam detector is panned (moved
on its vertical axis) and tilted (moved on its hori-
zontal axis). Two thumbwheels are provided to
carry out these actions (Fig 8)
Successful target-
ing will result in the
centre of the beam
on full power hitting
the central part of
the reflector and
light being returned
to the receiver
Fig 6 Targeting principle
or
tilt
thumbwheels
pan
Fig 8 Panning and tilting the detector
Fig 7 Aligning principle
Correct aligning will
result in the centre of
the beam, with power
automaticallyadjusted,
hitting the dead centre
of the reflector.
If the beam detector is
not correctly targeted
and aligned, problems
will occur.

12
Targeting explained
When the beam detector is set to ‘targeting’
it is automatically switched to full power. The
purpose of targeting is to adjust the detector
bypanning and tilting until thebeamshines on
the reflector which then reflects it back.
Progress in targeting is indicated by two LEDs:
no LED illuminated if beam hits outer part of
the reflector or no part of the reflector
red LED flashes if the centre of the beam falls
in theareashownas alightringinFig 10b. The
nearer the centre the quicker the flash rate.
the amber LED flashes at a constant rate
when the centre of the beam hits the area
shown in solid white in Fig 11b. Movement
of the beam away from the centre to the
boundaries of the dark area will cause the
red LED to flash again.
Fig 9a
Fig 9b
t
Fig 11a
Fig 11b
Fig 10a Fig 10b

13
Targeting step by step
1. Switch on the beam detector. Push the mode switch (Fig 12)up to
‘prism targeting mode’.
2. Pan and tilt the beam detector, by turning the thumbwheels, until
thecentre ofthe beam hits the part ofthe reflector shown in Fig 10b,
causing the red LED to flash. It does not matter which way you move
the detector. If moving in one direction does not cause the red LED
to flash, move the other way.
3. When the red LED flashes, select either pan or tilt (it does not matter
which you do first) and continue adjusting the detector until the red
flash reaches its maximum. Continue the adjustment until the red
LED goes out and the amber LED starts to flash.
4. When the amber LED starts to flash keep turning the thumbwheel
and start counting the number of steps.
5. Stop turning the thumbwheel when the amber LED goes out and
the red LED starts flashing.
6. Turn the thumbwheel back half the number of steps counted. The
amber LED should still be flashing.
7. Move the other thumbwheel until the amber LED has just gone out
andtheredLEDis at maximum flash. Again, it does not matter which
way you turn first.
8. At this point reverse the movement and, when the amber LED starts
to flash, proceed as in steps 4 to 6.
Note: At this point it is essential to test that the reflector and not
another surface is reflecting the beam. Cover the reflector with a
non-reflecting object and check that both LED indicators are off.
MODE SWITCH
PRISM TARGETING
ALIGNMENT MODE
OPERATING MODE
1234
ON
DIP
50% THRESHOLD
35% THRESHOLD
25% THRESHOLD
12% THRESHOLD
LATCHING ALARM
AUTO RESET
COMP FIRE ENABLE
COMP FIRE DISABLE
Fig 12 Mode switch
Fig 13
Fig 14

14
Alignment explained
Alignment can only be carried out after successful targeting.
When thedetectorisswitchedto‘alignment’ thepowerofthebeamis
adjustedautomatically. Theeffectof panning ortiltingisstill indicated
by the LEDs but what they are indicating is different from when the
detector is switched to ‘targeting’.
1. When the detector is switched to ‘alignment’ the LEDs flash to
indicate that signal optimisation is in progress.
2. During the alignment procedure:
• red LED flashes = beam is moving from the shaded
area (see Fig 15) to the centre of the reflector
• amber LED flashes = beam is moving away from the centre
of the reflector
The objective is to align the detector such that the LEDs stop flashing
and any adjustment (ie, any turn of the thumbwheels) will cause the
amber LED to flash.
Aligning step by step
1. Set the mode switch to the middle position—‘alignment’.
The detector will automatically optimise the infra-red beam
strength and receiver sensitivity. Progress of optimisation is indi-
cated by the LEDs on the front of the detector.
•Flashing red LED
The detector is receiving too high a signal and is attempting to
reduce the infra-red power output. The LED should extinguish
within 30 seconds*.
• Flashing amber LED
The detector is receiving too weak a signal and is attempting to
increase the infra-red power output. The LED should extinguish
within 30 seconds*.
• Flickering red/amber
This may occur when the detector is seeking the optimum set-
ting for the infra-red power.
• LEDs off
The detector has optimised the infra-red power and receiver
setting for the current orientation of the beam detector and
reflector.
*If the LED does not go out in 30 seconds the installation should be
checked before furtheralignmentandcalibrationworkiscarried out.
Repeat the targeting process described on page 13.
Leave the mode switch in ‘alignment’ for the next stage of the align-
ment procedure,
Fig 15
Fig 16
Fig 17

15
2. Thepurpose of thesecondstageofalignment
is to manually adjust the detector so as to align
the centre of the beam as closely as possible
with the centre of the reflector.
Turn one of the thumbwheels until one of the
LEDsstartsflashing. Itdoesnotmatterwhether
you pan or tilt first or which way you turn the
thumbwheel (Figs 18 to 20 assume that pan-
ning is carried out first).
If turning onewaydoesnotcause eitherofthe
LEDs to flash, turn the thumbwheel the other
way.
3. If the amber LED illuminates, turn the
thumbwheeltheotherwayuntil either the red
LED starts to flash (beam now close to centre)
or neither LED flashes (beam is in the centre).
Keep turning until the amber LED flashes then
stop turning (Fig 18). Go to step 5.
4. IftheredLED flashes,waituntil itstopsandthen
turn a few steps more in the same direction. If
the red LED flashes between steps, wait until it
stops. Keepturning until theamberLEDflashes
then stop turning (Fig 18). Go to step 5.
5. Turn the thumbwheel back, counting the
number of turns as you go, until the amber
LED starts flashing again and stop (Fig 19). If
the red LED flashes at any point, wait until it
goes out before going on.
6. Change the direction of turn of the
thumbwheel again and turn half the number
of steps counted (Fig 20).If thered LED flashes
at any point, wait until it goes out before going
on.
7. Now turn the other thumbwheel and carry
out the steps described in points 3 to 6. Figs
21 and 22 correspondingly show the tilting
movement.
8. At the end of the panning and tilting align-
ment procedures the centre of the beam
should be projected onto the centre of the
reflector, as shown in Fig 23. The LEDs will not
be illuminated.
The reflective beam detector is now aligned
and ready for final checks.
AMBER LED
FLASHES
NOTE NUMBER OF
TURNS UNTIL AMBER
LED FLASHES AGAIN
TURNING BACK HALF THE
NUMBER OF TURNS PUTS THE
BEAM AT THE CENTRE OF
THE VERTICAL LINES
Fig 18
Fig 19
Fig 20 no LED flashes
Fig 21 Fig 22
Fig 23 Detector aligned
IMAGINARY LINES
INDICATE LED FLASH
BOUNDARIES

16
Stabilisation and testing
The detector stabilises automatically but it is
necessary to check the area which is being
protected in order to make quite sure that the
beamisbeingreflectedonly bythereflectorand
not by other material.
1. Remove all material that might reflect light.
Light can be reflected not only by obvious
sources, such as metal surfaces, glass or
computerscreensbutalsobypaper,partition-
ing painted in pastel shades or even cloth-
ing—white shirts being a typical example.
2. Push the mode switch (Fig 12 on page 13)
down to Operating Mode.
When the detector has been switched to
Operating Mode it performs an internal cali-
bration check. The amber LED may flash for
up to 60 seconds. When it goes out, perform
the reflector test.
If the detector fails to calibrate the amber
LED will flash after 60 seconds. Please refer
to ‘Troubleshooting’ on page 20 if this should
happen.
Reflector test
Coverthereflectorcompletelywithnon-reflective
material. After 15 seconds or sooner the amber
LED of the beam detector will flash. Uncover the
reflector.
If the amber LED does not flash, light is being
reflected by an object other than the reflector.
Repeat the targeting and aligning procedures
in full.
Oncethereflector testhas beencarriedout suc-
cessfully, the targeting and aligning procedures
have been completed.

17
COMMISSIONING
Analogue values
The beam detector returns a pre-set analogue
value corresponding to its status. These values
are defined in Table 4 below.
The beam detector may return a pre-alarm
value before a full alarm condition occurs. The
analogue value depends on the smoke density
andthesetobscuration level(describedonpage
7) as shown in Table 5.
Analogue value Significance
0 Microprocessor fault
1 Sensor fault
2Prism(reflector) targeting mode
3Alignmentmode
4 General fault warning
5 ‘Signal High’ fault
6 Contamination compensation limit reached
20 Alignment drift negative
25 Detector normal
30 Alignment drift positive
32 Contamination compensation level low (40%)
33 Contamination compensation level medium (60%)
34 Contamination compensation level high (80%)
45–54 Pre–Alarm values (see Table 5 below)
64 Alarm
Table 4
Analogue value returned
Actual obscuration at set obscuration level of
25% 35% 50%
45 16 23 33
46 16 26 34
47 17 27 35
48 18 28 36
49 19 29 38
50 20 30 40
51 21 31 42
52 22 32 44
53 23 33 46
54 24 34 48
Table 5 Percentage of obscuration indicated by pre-alarm

18
Alarm test
A test filter with a gradient from 0% to 100% black
is supplied to carry out functional tests of the re-
flective beam detector.
Select the obscuration mark on the test filter (Fig
24) that corresponds to the obscuration set as
described in page 7.
Place the filter over the receiver (upper lens) of
the beam detector at the selected obscuration
threshold, taking care not to cover the the trans-
mitter optics (lower lens).
The beam should change to the alarm condi-
tion within 10 seconds and the red LED should
illuminate.* Check that the alarm condition is
registered correctly at the control panel. Re-
move the test filter and wait at least 30 seconds
before resetting the control panel. The red LED
should extinguish within 30 seconds of the reset
command.
*(Note: the red LED is controlled by the fire
control panel).
Fig 24 Test filter with obscuration levels indicated

19
PROTOCOL DATA AND FAULT INDICATION
Input/Output bits
Thereflectivebeamdetector respondstooutput
bits from the protocol as follows:
When output bit 2 is set to logic 1 on two or
more consecutive pollings the red alarm
LED is illuminated.
When output bit 1 is set to logic 1 on two
or more consecutive pollings the beam
detector carries out a self-test. If the test
is successful, an analogue value of 64 is
transmitted to the control panel. If a value
less than 54 is transmitted, the self test has
failed and the beam detector should be
inspected (see Troubleshooting on page
20).
Output bit 0 is not used.
Input bits 2, 1 and 0 reflect the status of the
corresponding output bit.
Type Code
The type code of the reflective beam detector is
101 01 (bits 210 43).
LED fault indication
A fault is indicated by the amber LED flashing
once per second.
If the drift compensation function has reached
its limit the amber LED flashes once every 2 sec-
onds. The detector will continue to function but
maintenance procedures should be carried out
at the earliest opportunity.

20
TROUBLESHOOTING
Before investigating individual beam detectors
for faults, it is very important to check that the
system wiring is fault free. Many fault conditions
are the result of simple wiring errors. Earth faults
on a data loop or any ancillary zone wiring may
cause communication errors.
Please also refer to Table 4 on page 17 for infor-
mation on diagnostics that may be supplied by
the beam detector.
Fault finding
Fault Possible Cause Action
Device not recognised Type code incompatibility Contact control panel
manufacturer to check
compatibility
Unable to obtain amber flashing
alignment LED No power to detector Check wiring
Unable to obtain red flashing align-
ment LED No power to detector Check wiring
Amber flashing LED in operating
mode Beam out of alignment Align beam
Alarm condition without fire Beam partially obscured
Transmitter/receiver contaminated
Environmental conditions
Check beam line of sight
Clean lenses and/or reflectors
Check for symptoms such as
condensation
Red LED illuminates after alignment Panel software Check analogue value at
control panel, then reset
Table 6