Accessories; Faults And Troubleshooting - SystemAir AW 355 D4-2-EX Montage- Und Betriebsanleitung

10.3.2 Damage to the fan
HAZARD
Hazard of explosion of an ignition-capable gas/air atmosphere!
›
Repair or replacement of the fan parts is expressly not allowed with EX-examined products.
 In all cases of damage (e.g. coil damage), get in touch with our service department. Defective EX fans must be
completely replaced. Repairs may only be done on the manufacturer's premises and by the manufacturer. You will
fi nd the address on the back of these operating instructions.
Failure to comply means a loss of ATEX admission.
10.4

Accessories

When ordering accessories, state the type designation of your EX fan. You will fi nd it on the name plate.
Accessories
10.5

Faults and troubleshooting

Fault
EX fan does not run smoothly
Output of X fan too low
Grinding sounds in operation
or start of the Ex fan
Thermo-contacts have
reacted
Ex fan does not reach nominal
speed
Current or consumption too
high
Table 12: Troubleshooting
66
Possible causes
Rotor imbalance
Adhesions to the rotor
Material decomposition on the rotor due
to aggressive material conveyed
Deformation of rotor due to excessive
temperature
Wrong direction of rotation of rotor
Loss of pressure in lines too high
Throttle organs not or only partly open
Intake or pressure paths blocked
Intake line installed twisted.
Minimum pressure does not exist
Capacitor not or not correctly connected
One or more phases not connected
Motor blocked
Electrical switching devices set wrongly
Motor coil defective
Drive motor has been designed wrongly
Minimum pressure does not exist
Rotor is mechanically decelerated
Y or D switching dependent on the vol-
tage stated on the motor
Remedy
Re-balancing by specialist company
Clean carefully, rebalance if necessary
Contact the manufacturer
Contact manufacturer, install new rotor,
check bearings
Change direction of rotation
Different line guidance
Check opening position on site
Remove obstacles
Loosen intake line and realign.
Check whether the minimum pressure
on the name plate can be reached by the
system
Connect capacitor
Connect all three phases on fan.
Contact manufacturer
Check and possibly reset setting of swit-
ching device
Contact manufacturer
Contact manufacturer for check of start
torque
Check whether the minimum pressure
on the name plate can be reached by the
system
Check and remedy fault
Check circuitry with the circuit diagram