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Problem
Solution or corrective action
Flow fault errors
("FLOW" LED
illuminated)
Low flow error
messages
High flow error
messages
General troubleshooting information
Do the following-
•
Ensure that the ClassiFire alarm factor is appropriately set.
•
Ensure that cables are correctly connected before powering up by use of
cable identifiers or electrical continuity checks. Incorrect connection could
damage the detector.
•
Ensure that cable of an appropriate approved type is used for interconnection.
•
Place sampling points so that the detector will be able to detect smoke at the
earliest opportunity.
•
Ensure that the detector exhaust is in an area with the same atmospheric
pressure as the sampling pipes, either by placing the detector physically in
the protected area or by leading a pipe from the detector exhaust to the
protected area.
•
Ensure that the environment of the protected area is within the environmental
operating parameters of the detector (temperature -10 to +60°C, humidity 0-
90%, non-condensing).
•
Set the detector address switches correctly if the detector is part of a network.
Stratos EX Hazardous Area Aspirating Smoke Detection System Installation Manual
These occur when the airflow rate into the detector exceeds the
programmed parameters. This usually occurs when there has been some
change in conditions. It may indicate that a sampling pipe is damaged, or
that the pipe has been blocked, e.g., by nearby building operations.
Flow monitoring is too sensitive for the environment. Increase the flow
limit offset.
If the detector input is sampled from one area and the exhaust is in
another area with different pressure (e.g., the detector is in a roof space
and sampling from an enclosed room), this may lead to flow faults. In this
case it would be necessary to lead a pipe from the exhaust to the
protected area to ensure nominal flow.
The airflow may be subject to temporary changes (spikes). Increase the
flow delay to 240 seconds.
Check that installed pipework is fitted with end caps. When used,
PipeCAD pipe modeling software prompts for the use of appropriate end
caps. Open bore pipes are not recommended.
Check that the pipe or filter is not blocked.
Check that the low flow fault threshold is not set too high.
Check that the pipe is screwed home into the flame arrestor and is not
broken or cracked.
Check that installed pipework is fitted with an end-cap.
PipeCAD pipe modeling software prompts the use of appropriate end-
caps. Open bore pipes are not recommended.
Check that the high flow fault threshold is not set too low.
Chapter 5: Troubleshooting
47
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Table of Contents
Troubleshooting
