12
| Troubleshooting/maintenance/repair/CO alarm
11.1 Troubleshooting Fan
Table 9 Troubleshooting
Problem
Possible causes
Remedy
Fan does not run
smoothly
Impeller imbalance
Rebalancing by a specialist company if possible,
otherwise contact Systemair.
Soiling on the impeller
Clean carefully, rebalance
Material decomposition on the
impeller due to aggressive
material conveyed.
Contact Systemair
Impeller rotates in wrong
direction.
Contact Systemair
Deformation of impeller due to
excessive temperature.
Ensure that the temperature does not exceed the certified
value/Contact Systemair.
Vibrations, oscillations
Check the installation of the fan.
Air output of fan too
low
Impeller rotates in wrong
direction.
Contact Systemair
Mechanical blockage
Remove the blockage
Motor does not
rotate
Faulty supply voltage
Check the supply voltage, re-establish the voltage supply
Faulty connection
Disconnect from the power supply, correct the
connection, see circuit diagram.
Temperature monitor has
responded
Allow the motor to cool down, find and resolve the cause
of the fault.
Electronics/motor
overheated
Insufficient cooling
Improve cooling.
Overloaded motor
Check if the correct fan is used for your application.
Ambient temperature too high
Check if the correct fan is used for your application.
Note:
For all other damage/defects, please contact Systemair.
11.2 Alarm and fault handling Carbon monoxide control unit
The control unit continuously monitors the sensor's function, as well as the function of the fans. The following sub-
points describe the the meaning of the fault and CO-Alarm display and the way in which they should be responded to.
11.2.1
Thresholds for fault displays
The control unit distinguishes between two fault types, which are specified in more detail in the table below.
Table 10 Fault display thresholds
Fault type
Setting threshold
Reset threshold
Comment
Fan failure
RPM < 130 rpm /
min
RPM ≥ 180 rpm / min
Fan fault or fault with the fan supply cables
–> Signalled after 10 seconds
Sensor fault
I
4-20mA
< 3.0 mA
I
4-20mA
≥ 3.5 mA
Short circuit or break in the sensor cable
–> Signalled after 3 seconds
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