10
Maintenance / remedying of faults
WARNING
Hazard from electrical voltage
›
Remedying of faults and maintenance only by a trained electrician or trained and instructed qualified personnel.
›
Pay attention to the industrial protection regulations in troubleshooting.
›
Pay attention to the 5 rules of electrical engineering:
–
clear (all-pole separation of an electrical system from live parts)
–
secure against switching on again
–
establish freedom from voltage
–
earth and short-circuit
–
cover or fence off neighbouring live parts.
10.1
Defects and remedying
Disturbance
Possible causes
Remedy
Multibox runs loud
Rotor out-of-balance
Re-balance by specialist company
Adhesions to rotor
Clean carefully, re-balance if necessary
Wrong direction of rotation of rotor
Change direction of rotation
Material decomposition on rotor due to exces-
sive tem-perature
Contact manufacturer
Deformation of rotor due to excessive tem-
perature
Contact manufacturer,
install new rotor,
check bearings
Air volume of Multibox too low
Wrong direction of rotation of rotor
Change direction of rotation
Loss of pressure in lines too high
Different line guidance
Throttle organs not or only partly open
Check opening positions on site
Suction or pressure paths blocked
Remove obstacles
Grinding sounds in operation or
start of the Multibox
Suction line installed twisted
Loosen suction line and re-align.
Thermo-contacts/cold conductor
have reacted
Capacitor not or not correctly connected
Connect capacitor
Wrong direction of rotation of rotor
Change direction of rotation
Motor blocked
Contact the manufacturer
Multibox does not reach no-minal
speed
Electrical switching devices set wrongly
Check and possibly reset setting of switching
device
Motor coil defective
Contact manufacturer
Drive motor has been de-signed wrongly
Contact manufacturer for check of start torque
Table 7:
Troubleshooting
46
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