Operating and Maintenance Instructions
210-OMI10878
ORIGINAL INSTRUCTIONS
Page 4 of 6
ebm-papst UK Ltd
Chelmsford Business Park Chelmsford Essex CM2 5EZ
Telephone: +44(0)1245468555 Fax: +44(0)1245466336
e-mail
Configuration
For optimum performance it is necessary to configure the controller to match the maximum total power
requirements of all of the connected fans. The maximum power rating for each fan will be available on the fan
label or datasheet. For example, if running 4 fans rated at 2 Watts each, the total power requirement is 4 x 2 = 8
Watts. The controller must then be configured to the lowest setting which exceeds the total power. In this case,
11 Watts.
To configure the controller, set the jumper links shown as shown in the connection diagram.
Initial Start-up
Due to minor differences in motor types and electronics, some fans may work better than others with the default
settings.
If the fan or fans fail to run on initial start-up, first check the following;
Soft start setting
The recommended setting is for a soft start with the rate of fan speed increase being managed by the controller
but a small number of fan types will only work with a faster ramp up speed. If the fan(s) fail to start properly,
switch this function off using the DIP switch and try to start the fan. If it makes no difference, reset the dipswitch.
Power setting
The power requirement of some fans means that they may be on the borderline for a particular power
configuration. A slight increase in demand during start-up for example, can be detected as an over current
condition by the controller causing an alarm condition and shut down of the fan.
If the fan does not start or starts then stops, move the power configuration jumper link to the next highest setting.
If it makes no difference, return it to the original setting.
If the controller still does not operate correctly, please refer to the troubleshooting guide.
A detailed technical specification for this controller and a list of ebm-papst fans which have been tested for
compatibility is available at
www.ebmpapst.co.uk/datasheets
Troubleshooting
In normal operation, the yellow LED will flash and the blue LED will be off. The following section is to help
diagnose common issues and interpret the different combinations of LED states.
Before referring to the guide, check that all connections are correct and secure and that the power setting jumper
link and DIP switches are in the correct position. It is assumed that the fan is known to be serviceable and is
correctly installed.
Symptom
LED status
Possible Reasons/Fixes
Fan not running at power on
Both Off
No power to controller, check connection and
supply
Both On
Fan not connected or connected in reverse
polarity.
Wattage jumper not fitted.
Supply voltage too high.
Both Flashing
Temperature is below minimum set point.
Fan off at minimum set point selected on DIP
switches.
Fan starts then stops
Both On
Selected power range too low.
Soft start selected off.
Fan starts and runs near full speed
Yellow On
Fan is drawing more power than expected during
start up. Check power range selection and
possible try next range up. Check Fans back
pressure.
Fan running at full Speed
Both On
Temperature at maximum set point.
