Maintenance/Troubleshooting; Preconditions; Faults And Troubleshooting - SystemAir DVSI Betriebsanleitung

10

Maintenance/troubleshooting

WARNING
Hazard from electrical voltage!
»
Trouble setting and service only by a trained electrician or trained and instructed qualified personnel!
»
Observe rules for safe work while troubleshooting!
»
Observe 5 safety rules for the electrical expert!
–
disconnect from the power supply (all-pole),
–
prevent switching on again,
–
test absence of voltage,
–
earthing and short-circuiting,
–
protect adjacent live parts by covers and barriers.
»
Switch the fan off as planned.
WARNING
Risk of crushing in hinged fans by the hinged frame shutting!
The hinged frame is very heavy because the fan wheel has been fitted on it.
»
Open and close the hinged frame carefully!
10.1

Preconditions

•
Energy supply has been switched off (all-pole current cut-out).
•
The rotor is at a standstill
10.2

Faults and troubleshooting

Fault
Fan does not run smoothly
Air output of fan too low
Grinding sounds in operation or
start of the fan
Thermo-contacts/posistors have
reacted
Fan does not reach nominal speed
Table 16: Troubleshooting
Possible causes
Rotor imbalance
Adhesions to the rotor
Material decomposition on the rotor due to
aggressive material conveyed
Wrong direction of rotation of rotor
Deformation of rotor due to excessive tem-
perature
Wrong direction of rotation of rotor
Losses of pressure in lines too high
Throttle organs not or only partly open
Intake or pressure paths blocked
Intake line installed twisted
Capacitor not or not correctly connected
Wrong direction of rotation of rotor
Motor blocked
Electrical switching devices set wrongly
Motor coil defective
Drive motor has been designed wrongly
Maintenance/troubleshooting
Remedy
Re-balancing by specialist company
Clean carefully, rebalance if necessary
Contact the manufacturer
Change direction of rotation
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
Connect capacitor
Change direction of rotation
Contact the manufacturer
Check and possibly reset setting of switching
device
Contact the manufacturer
Contact the manufacturer for check of start
torque
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