Chapter 4: Maintenance and troubleshooting
84 ModuLaser Modular Aspirating Smoke Detector Installation Manual
Corrective action
Flow Low” error
Check that the pipe giving the error is not blocked.
Check that the low flow fault threshold is not set too high.
Consider increasing the fan speed.
Flow High” error
Check that the pipe is pushed home into the inlet and is not broken or
cracked.
Check that installed pipework is fitted with endcaps. PipeCAD pipe
modelling software prompts for the use of appropriate endcaps. Open bore
pipes are not recommended.
Check that the high flow fault threshold is not set too low.
Consider reducing the fan speed.
Check that the display ribbon cable has not been damaged.
Fault and warning messages
Fault and warning messages are shown in the table below.
Table 33: Fault and warning messages
Message Description
Flow Low The current air flow is below the low limit (pipe obstructed)
Flow High The current air flow is above the
high limit (pipe missing or
broken)
Flow Sensor Flow sensor failure
Temperature Sensor Temperature out of range or sensor failure
Filter Blocked The filter is obstructed or dirty
Filter Removed The filter has been removed
Laserhead Laserhead failure
Fan Motor Fan motor failure
Fan Power Fan power failure
Communication Communication with the device is not possible
Repeat Address Repeated address found in the network or cluster
Too Many Cluster
Detectors
There are more than eight detectors in the cluster
No Cluster Detectors No detector in a cluster with a Standard or Minimum
Display
Cluster Loop Break The cluster loop is not closed and Looped Bus is
configured
Network Loop Break The network loop is not closed and Looped Bus is
configured
Invalid Address Invalid address assigned to device
Multiple Cluster
Displays
More than one display module found in the cluster
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