Safetec SDS-2/6 Owner's manual

safetec
Fault Finding Instructions SDS26 16.06.09 Seite 1 von 13
Additional Fault Finding Instructions
for
Smoke Detection System SDS-2/6
safetec Brandes und Niehoff GmbH
Arenskule 7-9
D-21339 Lüneburg
Germany
Tel.: ++49 - 4131 – 7670-200
Fax.: ++49 - 4131 – 7670-201
Contents
• Fault Finding Table ( Quick Reference )
• Fault Finding of Airflow Faults
• Fault Finding of Data Transfer Faults
• Fault Finding of Smoke Detector Faults
• Problems with Fuses on Power Supply Module
Drawings
• Wiring Diagram Smoke Detectors, Airflow Indicators, Zener Barriers BG01.724
• Configuration Tables SDS01.100.80 - SDS01.100.88

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Fault Finding Instructions SDS26 16.06.09 Seite 2 von 13
Fault Finding Table
Faults
(on the LCD)
Possible Reasons Correction
CHECK : Fan -x- All 3- way valves were shortly
closed.
1. Check position of 3-way
valves
2. Switch-over to stand-by fan
aggregate
Fuse(s) of fan aggregate on
power supply module defect Correct faults Exchange fuse
Fan -x- defect
Exchange fan
CHECK : Valves and Fans All 3- way valves in wrong
position. Set 3- way valves in air sampling position
Both fan aggregates are defect. Repair or exchange fan
aggregates
FAULT : Airflow Line -x-
3- way valve in wrong position. Check position of 3- way valve
Detection line is clogged. Send compressed air through
detection line. Ensure all 3- way
valves are closed in way to
smoke detection panel during
this procedure
FAULT : Data Transfer Device -
x- Defective fuse in device -x-. 1. Eliminate fault 2. Exchange fuse
Note: The correlation of the Device address no. of device -x-
is not correctly adjusted. Adjust correct device address no. (refer to section 6 )
different “device“ nos. to the
system components is listed on the Cable connection to device -x-
(RS-485-Bus) is incorrect Check cable connection
rear side of the door of the smoke
detection panel Device -x- is defective
Replace device -x-
only fire alarm panel:
FAULT : Data Transfer Fuse in repeater panel is defective. 1. Eliminate fault 2. Exchange fuse
Connection (RS-485-Bus) at
repeater panel is incorrect Check cable connections
FAULT : Dirt in Line -x- Smoke detector with internal
residue. Clean smoke detector
FAULT : Emergency Supply Breakdown of ship emergency
power supply circuit on ship. Re-establish circuit
FAULT : Main Supply Breakdown of ship main power
supply circuit on ship. Re-establish circuit
FAULT : Smoke Detector Line -
x- Smoke detector -x- is not installed. Insert smoke detector
Smoke detector is defective. Change smoke detector
FIRE : Line -x-
(but smoke cannot be verified) ID no. x is attached to more than one smoke detector Change ID nos. of smoke detector to correct setting
( refer to 5.3.2 )
After cleaning the smoke
detector, the labyrinth has not
been correctly reassembled.
Ensure, that the snapping lugs
of the labyrinth are snapped
completely over the PCB
( refer to section 5.3.3 )

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Fault Finding Instructions SDS26 16.06.09 Seite 3 von 13
Further Fault Possible Reason Correction
Contrast of LCD is too weak or
too strong Contrast control is not adjusted Adjust contrast intensity at the adjustable resistor on the rear
side of indication / control
module
LCD does not display any
information, all fields are dark
High electrostatic discharge
upon the display Switch off Smoke Detection System shortly by quickly
pulling out Fuse F1 on power
supply module
Fan units with v-belt only:
Fan unit too loud
Tension of v-belt incorrect Adjust tension of v-belt

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Fault Finding Instructions SDS26 16.06.09 Seite 4 von 13
Fault Finding of Airflow Faults
Fault Indication: “FAULT Airflow all lines” or “FAULT: Airflow Line -x-y-z-“
• Ensure one of the fans is running.
• Ensure 3-way-valves are open.
• Ensure upper door of the smoke detection panel / extension unit is closed.
• Ensure covers of the detector boxes are closed and screws of covers are tightened.
• Disconnect hoses at the smoke detection panel / extension unit to ensure airflow
through smoke detection panel / extension unit.
• Open the upper door of the smoke detection panel / extension unit and remove
cover of airflow indicator. Remove wire from terminal no.3 in the airflow indicator
and connect this wire together with the other wire to terminal no.1 (short circuit).
Now the fault indication of this line must disappear. If the fault indication
disappears, the airflow indicator must be exchanged. If the fault indication for this
line is still present, it must be an electrical problem, not a problem of the airflow.
For further examinations of the electrical wiring and components, please refer to
drawing no. BG01.720.4. Please note, that airflow indicators for line 1-3 are connected
to terminal nos. 33/34 and airflow indicators for line 4-6 are connected to terminal nos.
35/36 at the detector interface module.
• Check the wiring between resistor - PCB and appropriate zener barrier.
• Check the wiring between resistor - zener barrier and detector interface module.
• Measure the voltage between terminal nos. 34/18 and between terminal nos. 36/18
at the detector interface module. Both values must be 15V. These voltages are
supply for the multiplexed signals of the airflow indicators.
• Measure the voltage between terminal nos. 33/18 resp. 35/18 at the detector
interface module. These voltages are the output signals of the airflow indicators.
The values must be as follows:
Line 1-3 Line 4-6
Situation:
Airflow is present
at the following
Line Nos.:
resulting Voltage
at Terminal Nos.
33/18 [V]
Situation:
Airflow is present
at the following
Line Nos.:
resulting Voltage
at Terminal Nos.
35/18 [V]
1, 2 and 3 4,93 4, 5 and 6 4,93
2 and 3 4,55 5 and 6 4,55
1 and 3 4,10 4 and 6 4,10
3 3,58 6 3,58
1 and 2 2,95 4 and 5 2,95
2 2,18 5 2,18
1 1,23 4 1,23
No airflow 0 No airflow 0

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Fault Finding Instructions SDS26 16.06.09 Seite 5 von 13
Table 1a and 1b
• If the measured voltages are correct, but fault indication is still present, the detector
interface module must be exchanged.
• If the measured voltages are not correct compared with table 1, disconnect the
wires at the terminal nos. 33/34 at the detector interface module. Measure the
resistance between the disconnected wires and compare with the following table:
Situation:
Airflow is present at the
following Line Nos.:
Resistance
[Ω]
Resistor-PCB at terminal
nos. 47/48
(without Zener Barrier)
[Ω]
1, 2 and 3 1044 784
2 and 3 1174 914
1 and 3 1357 1097
3 1631 1371
1 and 2 2087 1827
2 3001 2741
1 5741 5481
No airflow ∞∞
Values for line nos. 4 - 6 are corresponding
Table 2
• If the measured values are not correct compared to table 2, disconnect the wires of
the zener barrier and measure the resistance of the zener barrier between terminal
nos. 4/5 and terminals nos. 1/8 ( 130 Ohm each path ).
• If the measured values are not correct, the zener barrier is defect.
• If the measured values are correct, the resistor - PCB must be defect. For
verification measure the resistance of the resistor - PCB betweeen terminal nos.
47/48 and compare with table 2, column no.3.

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Fault Finding Instructions SDS26 16.06.09 Seite 6 von 13
Fault Finding of Data Transfer Faults
General Information
The following components of the smoke detection system SDS are connected by a 4-
wire-bus ( RS485-bus ):
Name of Component Function Address – No.
Indication- / control module
in smoke detection panel Master No address
Detector interface module
in smoke detection panel Slave 1
Detector interface module
in extension unit no.1 Slave 2
Detector interface module
in extension unit no.2 Slave 3
Indication- / control module
in repeater panel Slave Next successive no., depending from no. of extension units
The master calls successively all slaves to send data ( for example: status of smoke
detectors and airflow indicators ). This data will be read and displayed by the master
and by the repeater panel.
Each slave has an adjustable address-no. The address no. of a component serves for
internal and external identification of a component.
In case of a fault the component with the address “x” will be displayed as “Device –x-
“ on the LC-display.
The no. of slaves to be called by the master must be adjusted by a rotary switch at the
rear side of the indication- / control module in the smoke detection panel.
The bus cable supplies electrical power for the slaves ( 24V DC ) and is used for data
exchange between all modules. In all components, the terminals for the bus cable are
labeled with the same terminal-nos.:
Terminal-No. Function
17 Power Supply +24V DC
18 Power Supply 0V
19 Data Bus Signal A
20 Data Bus Signal B
All components must be connected by the bus cable in a line ( not in form of a star ! ).
At both ends of the line the bus must be terminated with a resistor 120 Ohm. In most
cases one of the ends is in the repeater panel, the other end is in the smoke detection
panel or in the last extension unit. The sequence of the components within the line
needs not to follow the sequence of address nos.

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Fault Finding Instructions SDS26 16.06.09 Seite 7 von 13
Fault Indication “FAULT: Data Transfer”
This fault indication without display of any device no. appears only on the repeater
panel. It means, that no call of the master reaches the controller of the indication- /
control module in the repeater panel. Therefore no other faults can be displayed.
Please check the following:
• Check setting of rotary switch at indication- / control module in smoke detection
panel. The adjusted no. determines the no. of called slaves.
• Check setting of rotary switch at indication- / control module in repeater panel. The
adjusted no. determines the address-no. of the repeater panel.
• Ensure, that the address-no. of the repeater panel is not assigned to another
component.
• Check the fuses on the adapter – pcb of the repeater panel.
• Ensure correct bus-cable connection to the repeater panel. Note: In most cases the
cable between smoke detection panel and repeater panel is lead through a cable
connection box. This bears the risk of a mix-up of the 4 wires. If you are not sure,
whether the connection is correct, please proceed as follows:
Go to the smoke detection panel and disconnect the wires to terminal nos. 19/20
from the cable which connects the repeater panel. Switch on power supply. Go to
the repeater panel and find out the wires which carry 24V ( 20 – 28 V ). Connect
the plus-pole to terminal no.17 and the minus-pole to terminal no.18 in the repeater
panel. When power is on, the green lamp of the repeater panel must be lighted now.
Now connect the remaining wires to terminal nos. 19/20. If the a.m. fault indication
is still present, please exchange the wires at terminal nos. 19/20. Now the repeater
panel should be connected to the master.
Fault Indication “FAULT: Data Transfer Device -x-”
This fault indication shows the address of the component, which is not detected by the
master or by the repeater panel. Please check the following:
• Check setting of rotary switch at indication- / control module in smoke detection
panel. The adjusted no. determines the no. of called slaves.
• Check the setting of the rotary switch of the component, which shall have the
address no. “x”.
• Ensure that this address no. is not assigned to any other component.
• Check the wire connections of the bus-cable.
• Check fuses of the component with address-no. “x”.

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Fault Finding Instructions SDS26 16.06.09 Seite 8 von 13
Fault Indication “FAULT: Data Transfer Device -1-2-3- ... ”
( all connected components are indicated as faulty )
When the fault indication lists all addressable components, please check the following:
• Check setting of rotary switch at indication- / control module in smoke detection
panel. The adjusted no. determines the no. of called slaves.
• Check fuses F3/F4 on power supply module (fuses for bus signal A and B to
master).
• If fault indication is still present, a fault in bus-cabling could prevent complete data
exchange between all components. To locate this fault, please disconnect all bus-
cables in the smoke detection panel. As a result, the fault indication for “Device-1-
” should disappear, because this component ( detector interface module in smoke
detection panel ) is connected internally to the master.
• Reconnect “Device-2-“. Let all other components be disconnected. Now the fault
indication for “Device-2-” should disappear. However if again all connected
components are indicated as faulty, the wiring to “Device-2-” is not correct or the
component itself is defective.
• Reconnect all remaining components accordingly one by one.
Note:
• For setting of rotary switches please also refer to drawing nos. SDS01.100.80 -
SDS01.100.88.
• Changing of rotary switches will not be valid before power down and restart of the
smoke detection system.

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Fault Finding Instructions SDS26 16.06.09 Seite 9 von 13
Fault Finding of Smoke Detector Faults
General Information
Max. 6 smoke detectors are connected to one smoke detection panel or to one
extension unit. Each smoke detector has a DIP-switch on its rear side to assign its ID-
no. Note that only the values 1 – 6 are allowed ( also in the extension units with higher
line nos. ! ). The indication of a smoke detector on the LC-Display depends on its ID-
No. and its position in the smoke detection panel or in a extension unit. The smoke
detectors in the smoke detection panel will be displayed as “Smoke Detector Line -1-“
up to “ Smoke Detector Line -6-“. The smoke detectors in the extension unit no.1 will
be displayed as “Smoke Detector Line -7-“ up to “ Smoke Detector Line -12-“ and so
on.
Electrically up to 6 smoke detectors are connected in one line to one detector interface
module via a zener barrier for intrinsically safe operation.
Fault Indication: “FAULT Smoke Detector Line -x-“
Please check the following:
• Smoke detector in line “x” is inserted in its base.
• Smoke detector in line “x” has the correct ID-no.
• The ID-No. of this smoke detector has not been assigned to any other smoke
detector in this smoke detection panel / extension unit
Fault Indication: “FAULT Smoke Detector Dirt in Line -x-“
The smoke detector in line “x” is dirty. Please refer to the instruction: “Cleaning of
Smoke Detectors” on the next page.
No Fire Indication, but Smoke is present
• Ensure that approriate detector interface module is working. For example: If
“FAULT Data Transfer Device -1-“ is indicated, no Fire alarm or airflow fault
from line 1 - 6 can be transmitted.
• Check setting of the lower rotary switch on the detector interface module. If 6
smoke detectors are connected to the detector interface module, the lower rotary
switch must be adjusted to “6”.
Alarm Indication: “FIRE Line -x-“, but no smoke is present
Check the setting of the ID-Nos. of all smoke detectors in the panel. The ID-No. for
line “x” might be assigned to more than one smoke detector.

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Fault Finding Instructions SDS26 16.06.09 Seite 10 von 13
All smoke detectors of the smoke detection panel or extension unit indicate
“FIRE”, but no smoke is present
Please disconnect the wires at terminal nos. 31/32 at the detector interface module. If
the alarm indication is still present, the detector interface module is defective and must
be exchanged. If the alarm is not displayed after disconnection of the wires, a short
circuit in the smoke detector line including the zener barrier is probable. Disconnect
the zener barrier and measure the resistance between 5 and 8. If a short circuit will be
indicated, the zener barrier must be replaced. If no short circuit has been found in the
zener barrier, the short circuit must be located in the wiring of the smoke detectors.
Please note, that all smoke detectors are connected in one line. Remove all smoke
detectors in this panel. No short circuit may be measured between terminal no.1/3 or
between terminal no.1 and enclosure or between terminal no.3 and enclosure.
Note:
• For setting of rotary switches please also refer to drawing nos. SDS01.100.80 -
SDS01.100.88.
• Changing of rotary switches will not be valid before power down and restart of the
smoke detection system.