Operational Failure - Woods EC-ITF Installation Manual & Technical Specifications

9. OPERATIONAL FAILURE

Deviations from the fan unit's normal operating condition (noise, vibrations, smoke, current strength) indicate a
fault in the fan unit and must be investigated immediately by maintenance personnel.
Long-term faults can lead to serious damage to the fan unit and installation components
and can result in personal injury!
If the maintenance personnel are unable to remedy the fault, you must contact the fan's supplier.
Fault
Fan doesn't turn, switch is on
Fan is not turning,
Switch is on,
Work switch is on / terminal is connected
The motor protection becomes activated
during ventilation or test works
Impeller is off balance
The fan turns but moves no or little air
Vibrations in the fan
Extreme noise level
9.1. DIS- / ASSEMBLY
Disassembly takes place in the reverse order of assembly. For all bolt connections, it is necessary
to use a torque wrench, besides the usual locking agents (spring washers, etc.).
Reimplementation of the fan unit may only occur after all safety checks have been made in compliance with
chapter 7.
14
Possible Cause
Work switch is at "0" or the cables in the terminal
box are not connected properly
a. There is no power supply or the control fuse is
defective
b. The motor protection is activated
Bearing is defective
Ceiling is not flat,
Damage to fan unit
a. Airflow interrupted
b. Improper fan rotational direction
a. There is dirt/dust caked on the
impeller blades
b. The impeller is damaged
c. The impeller is off-balance
The bearing is defect, impeller is improperly
turning
Remedy
Turn the work switch to "1" or (properly)
connect the cables in the terminal box
Check the power supply, fuses and connections
Check the motor at max. run, check power supply,
check power consumption,
check the impeller's rotation
Check the impeller for foreign objects, level out
the attachment plate,
ascertain damage (call the supplier)
Create a free air passage,
Clean the impeller,
Check the extraction and blow-out sides
Electrically reverse the motor to change the
rotational direction (change phase)
Clean the impeller
Contact the supplier
Contact the supplier
See corresponding fault