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5
Troubleshooting
Starting problems
Fault Cause Remedy
"No air" on display
No air has been exhausted.
Fan blocked.
Vacuum valve does not connect.
Plug of vacuum valve is not inserted.
Clean fan.
Clean outlet tube.
Eliminate the fault.
Check if the valve’s switch connects.
Check position/switching point of the switch.
Insert the plug in the right input of the control.
"No speed" on
display
Malfunction frequency converter.
Frequency converter out of order.
Plug of drive is not inserted.
Speed sensor does not detect pulses.
See page 44.
See page 44.
Insert the plug in the right input of the control.
Adjust distance chain wheel and sensor to 1mm.
Out of order, replace sensor.
"No heat" on
display
Burner in reset.
Ionization follow-up cable not inserted well in
contact of burner.
Plug of heating is plugged out of the burner.
No gas in pipe at rst set-up.
Overheat switch tripped.
Fuse gas control broken.
Open gas tap and reset burner.
Insert plug well in burner and control print.
Insert plug in right input of the control.
Make many start attempts, with resets in the
meantime, so that air is removed from the pipes.
Check system and reset switch.
Replace fuse after controlling system.
"Foot" on display
Foot pedal is operated. Release the foot pedal.
Readjust the switch.
Tighten the springs.
"Heat1" or
"Heat2" on display
(number of the
defective sensor)
Temperature sensor cable interrupted.
Temperature sensor out of order.
Input on control out of order.
Check cable and repair defects.
Replace the sensor by a new one.
Replace the control by a new one.
Frequency converter
Fault Condition Possible cause
OI.AC**
Drive output instantaneous over current. Insufcient ramp times.
Phase to phase or phase to ground short circuit on the drives
output.
Drive requires autotuning to the motor.
Motor or motor connections changed, re-autotune drive to motor.
It.AC
I²t on drive output current. Excessive mechanical load.
High impedance phase to phase or phase to ground short circuit
at drive output.
Drive requires re-autotuning to motor.
HFxx trip
Hardware faults. Internal drive hardware fault.