22 Maintenance / remedying of faults
WARNING
Hazard from electrical voltage
› Remedying of faults and maintenance only by a trained electrician or trained and instructed qualied 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.
22.1 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
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
Output 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 have reacted Capacitor not or not correctly connected Connect capacitor
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
47
Multibox MUB - V 1.0
Maintenance / remedying of faults
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