112
en | Maintenance
Aspirating Smoke Detector
2018.04 | 2.0 | F.01U.130.926
Operation Guide
Bosch Sicherheitssysteme GmbH
–
Restore the operating voltage and run the unit for a few minutes.
–
If the fan connection is faulty, the malfunction will no longer occur.
Check the fan connection on the motherboard: terminal 1 = red, terminal 2 = black).
–
The fans are faulty or obstructed
–
If the fan connection is correct (troubleshooting step 2), the malfunction will
reoccur.
–
Measure the fan voltage (DC) using a multimeter.
–
If the fan voltage is outside the limits specified below, the fan may be faulty:
If the fan voltage is set at 6.9
V, the maximum permissible setting is 7.6
V and the
minimum is 6.0
V.
If the fan voltage is set at 9.0
V, the maximum permissible setting is 10.0
V and the
minimum is 7.8
V.
Replace the entire housing, as the fans cannot be removed.
–
Motherboard faulty
–
You will need a second motherboard to make this diagnosis.
–
Disconnect the power from the unit.
–
Replace the motherboard with a new motherboard of the same type.
–
Restore the operating voltage and run the unit for a few minutes.
–
If the motherboard is faulty, the malfunction will no longer occur.
Replace the faulty motherboard.
8.2.4
4 Flashes - Error: Air Pressure Correction Voltage Monitoring
In operation with two detector modules, both LEDs flash. When troubleshooting, the following
steps should be carried out in the specified order.
–
The R3 potentiometer is moved to the setting for the pressure-dependent airflow
calibration.
–
Using a multimeter, measure the voltage (DC) at measuring points MP2 (x) and MP3
(-).
–
The default measurement value is 1.2
V. However, deviations may occur due to the
calibration of the airflow dependent on air pressure.
–
The measurement value must be between 0.5
V and 1.9
V. If the measured voltage
value is outside of this range, the R3 potentiometer setting is faulty.
Note:
The malfunction only occurs at voltages below 0.2
V or above 2.3
V.
Using the R3 potentiometer, reset the voltage to a point between the measuring
points MP2 (x) and MP3 (-). 1.2
V for calibration independently of air pressure. In
accordance with the air pressure correction table for air-pressure-dependent
calibration.
–
Motherboard faulty
–
The voltage cannot be set in step 1.
–
Disconnect the power from the unit.
–
Remove the detector module's connection cables from the motherboard.
–
Restore the operating voltage and run the unit for a few minutes.
–
If the voltage at measuring points MP2 and MP3 cannot be set with the R3
potentiometer, the motherboard is faulty.
Note:
If operating without a detector module, the diagnostics LED flashes 7 times.
Replace the faulty motherboard.
–
Detector module faulty
–
Disconnect the power from the unit.
–
Reconnect the connection cable for the first detector module to the motherboard.
–
Restore the operating voltage and run the unit for a few minutes.
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