Tube Fan
10 | ENGLISH
Original instructions
INS00062-B
Fault
Possible cause
Possible remedy
(If present) VFD (Variable Frequency Drive) defect-
ive
Check VFD (refer to VFD manufacturers’ instruc-
tions)
Fan does not start
(supply voltage at fan motor terminals is present)
Thermal protection activated
(Fan motor has overheated)
Clean the motor
Check for overloading of fan system (intake or ex-
haust blocked?)
Check if the supply voltage is not too high or too low
Impeller blocked
Remove the blockage
Only for 1~ fan motors: wrong or defective capacitor Replace the capacitor
Temperature too low for the bearing grease
Do not operate the fan outside the ambient temper-
ature range as specified on the rating plate and
technical data sheet
Fan motor overheats while running
Fan is overloaded
Check for overloading of the fan system (intake or
exhaust blocked?)
Fan motor overheated due to dirt in cooling fins.
Clean the motor
Supply voltage too high or too low
Check the power supply
Incorrect supply frequency
Check the power supply
Only for 3~ motors: phase voltage imbalance
Check the power supply
Only for 1~ motors: wrong or defective capacitor
Replace the capacitor
Fan motor overheats while running
Only for 1~ fan motors with start capacitor: Start ca-
pacitor does not disengage after motor has started
(continuously on)
Replace start capacitor
Fan rotates in wrong direction
1~ fan motors: capacitor incorrectly connected
Connect according to wiring diagram (contact sup-
plier)
3~ fan motors: supply incorrectly connected
Swap any 2 of the 3 phases of the supply
Fan speed (rpm) is too low
Supply voltage is too low
Check the power supply
Incorrect supply frequency
Check the power supply
Only for 1~ fans: wrong or defective capacitor
Replace the capacitor
Only for 3~ fans: STAR instead of DELTA connec-
ted
Connect as DELTA
Check wiring diagram!
3~ fan motors: Phase failure
Restore all 3 phases
High power consumption
Fan is overloaded
Check for overloading of the fan system (intake or
exhaust blocked?)
Fan speed is too high
Check the supply voltage and frequency
Unusual or excessive noises
Impeller hits fan housing
Check the installation and fixings and alignment
Fan is operating in stall point
Lower the system resistance
(Intake or exhaust blocked)
Bearings are damaged or worn
Replace the bearings
Unusual or excessive noises
Only for 1~ motors with start capacitor: Start capa-
citor does not disengage after motor has started
(continuously on)
Replace the start capacitor
Detailed repair and replacement instructions are available from your supplier
or Vostermans Ventilation B.V.
It is highly recommended to use genuine parts only for service and repairs.
10
End of life
Disposal
At the end of the life of this fan, dispose of it properly in accordance with
regulations that apply in your area.
Recycling
The main materials used in the electric motor are copper, steel and
aluminium.
Most of the fan parts have the recycling symbol with material code listed on
them to facilitate proper recycling. Some parts are made of easy to identify
materials such as steel, and have no recycling symbol on them.
Symbol Material
Polypropylene
