Thematics
Dedicated controllers
No visual indicator (LEDs off)
Check that the power cable is correctly connected to the back of the board. To access the back of the board, simply unscrew the two screws.
The fan does not turn on when I press the fan on/off button
-
Check if the yellow LED lights up when you press the Ventilation On/Off button.
-
Check the electrical supply to the motor
- If you have a variable frequency drive, check its power supply and the connections of the on/off contacts.
- Check that the speed sensor is properly connected to the controller by accessing the back of the board.
- Turn off and then turn on the power to the controller.
The front speed of my fume hood is insufficient
- Check the direction of rotation of the motor. A SEAT fan running in the wrong direction will only draw 20% of its capacity. Reversing the volute (LG <->RD) has the same effect.
- Check that the fan is correctly sized for the installation.
- If a flow controller is used to control your fume hood, then redo the settings. The 0/10V signal sent to the controller is certainly too small.
The controller does not provide power, it provides a normally open contact. The light must still be connected to the power supply through the relay, in the same way as a switch.
The front speed of my fume hood is too high
- Check that the fan is correctly sized for the installation.
- If a flow controller is controlling your fume hood, then redo the settings. The 0/10V signal sent to the controller is probably too high.
You are in the test mode. Consult the user manual to exit this mode.
The green LED is on and the red LED is flashing
You are in the setting mode. Consult the user manual to exit this mode.
The alarm sounds repeatedly after a short period of time
- Make the alarm threshold settings again.
- The alarm delay may be too short. Two delays can be set using the switches on the back of the board: 15s and 30s. See the user's manual.
Air velocity/flow does not vary
Check with a voltmeter if the 0/10V output varies:
- If it changes, check the VFD connections
- If it does not change, check that the probe is correctly positioned on the fume hood and carry out the adjustment procedure again (see operating instructions)
The controller beeps 10 times when exiting the setting mode
- The set face speed is too low. Redo the settings using a higher speed.
- Check that the probe is correctly positioned on the fume hood and carry out the adjustment procedure again (see operating instructions)