SERVICE BULLETIN
SB2272
ADDRESSEES

: Owners and operators
ABC Customer Care and Parts Source

VEHICLE MODEL

: Vehicles with Sesaly smoke&heat detector HSD8024W

MANUAL CHAPTER

: 01.09 Fire protection equipment – smoke&heat detector

BULLETIN TYPE

: Service information

DATE

: November 30th, 2023

SUBJECT

: Sesaly smoke & heat detector HSD8024W

CONDITIONS

: This service bulletin does not entitle to any reimbursement.

INTRODUCTION
The purpose of this service bulletin is to inform you about the Sesaly HSD8024W smoke&heat
detector (VH11726708) to prevent unnecessary replacement.

Figure 1: Location of led
indicator on smoke & heat
detector Sesaly HSD8024W

LED INDICATOR ON DETECTOR HOUSING
LED COLOR
Green
Yellow (low flashing)
Yellow (high flashing)
Purple
Red (continuously)
Red (flashing)
Blue

DESCRIPTION
In operation
Low contamination
High contamination
Alarm input failure
Smoke alarm
Heat alarm
While initializing

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DOES THE DETECTOR NEED TESTING?
All detectors are tested by the manufacturer before shipment. You don’t need to do additional
tests.
If required by Van Hool, the detector can be tested by using a smoke
test spray. Van Hool recommends the “A3 Smoke Test Spray” of the
manufacturer “SOLO”.
Test must be done when the detector in operation (led = green). After
testing, the vehicle ignition must be switched off and on again to put the
detector back in the status “in operation”.

Figure 2

WHAT IS THE MEANING OF “LOW CONTAMINATION” AND “HIGH
CONTAMINATION”?
After a period of time, the sensor in the detector becomes covered with dust or other particles.
•
•

Low contamination: sensor is being covered with dust or dirt and should be cleaned.
High contamination: sensor must be cleaned to prevent the activation of the alarm after a
short time, although there is no fire.

To clean the sensor, the detector must be opened. Clean the inside of the detector by using for
example an air duster (= cannister with compressed-air for the safe removal of dust and other
airborne contamination). Do not blow to hard on the circuit board but only clean the sensor
compartment. There is no need to replace the detector!

HELP DESK
If there are any questions regarding this subject, please call ABC Customer Care & Parts Source
toll-free for guidance on 1-877-427-7278.

DISCLAIMER:
The procedures contained herein are not exclusive. Van Hool cannot possibly know, evaluate, or
advise the transportation industry of all conceivable ways in which a procedure may be undertaken
or of the possible consequences of each such procedure. Other procedures may be as good, or
better, depending upon the particular circumstances involved. Each carrier who uses the
procedures herein must first satisfy itself thoroughly that neither the safety of its employees or
agents, nor the safety or usefulness of any products, will be jeopardized by any procedure
selected.

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INFORMATION HANDLING:
Important additions and modifications regarding technical information not yet included in the
manual will be communicated through Service Bulletins.

VAN HOOL CUSTOMER PORTAL:
Consult the customer portal regularly for the latest service documentation. In addition to the
maintenance manual, you will also find the operating manual and the spare parts catalogue of your
vehicle on the customer portal. The customer portal is accessible through www.vanhool.be, and
only with a code (password) from Van Hool. If you do not have a password yet, request it by using
the above link.

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