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Installation and Operating Instructions
Fault/problem
Possible causes
Fan does not start
– No voltage, phase missing
– Impeller blocked
– Motor blocked
Fuse tripped
– Ground fault/shorted coil in motor Replace motor
– Supply line/connection damaged
– Connected incorrectly
– Motor insulation damaged
Residual current de-
vice tripped
– Supply line insulation damaged
Motor protection
– Tight bearing
switch triggered
– Impeller touching
– Incorrect operating point
Impeller touching
– Strong contamination
– Impeller damaged
– Casing damaged
– Impeller not central
– Incorrect installation
Incorrect air flow di-
rection
– Incorrect connection
Vibrations
– Contamination
– Bearing damage
– Incorrect operating point
– Attachment-related resonance
Abnormal noises
– Incorrect operating point
– Impeller touching
– Bearing damage
– Mechanical damage
Power consumption
– Incorrect operating point
too high
– Impeller touching
– Bearing damage
Fan does not perform
– Insufficient airflow
(speed)
– Incorrect voltage
– Bearing damage
– Contamination
– Insufficient backflow
AMD – Medium-pressure axial fans
4.3
Repair work
Repair work on the medium-pressure axial fans may only be carried out by relevant specialists.
All electrical work may only be carried out by electricians.
The installation, maintenance and servicing may only be carried out by specialists (e.g.: industrial mechanics, mecha-
tronics engineers, metal workers or persons with comparable training) with the exception of electrical work.
Optimal operational reliability of the fans is only guaranteed by Helios spare parts and manufacturer repairs.
Please contact Helios Customer Services for questions regarding commissioning, maintenance or spare parts.
4.4
Information – Fault causes
Possible solutions
Check mains voltage
Check connection according to wiring diagram
Clear blockage, clean, replace impeller if nec.
Check motor, replace if necessary
Replace parts, replace motor if necessary
Check connection, change
Replace motor
Replace supply lines
Replace bearing
See Impeller touching
Check suitability of fan, Check/keep inflow
and outflow clear
Clean
Replace impeller
Replace casing
Contact Helios customer service
Correct installation situation
Check/change connection
Clean
Replace bearing
Check suitability of fan, Check/keep inflow
and outflow clear
Check or repair attachment, use vibration
damper
Check suitability of fan, Check/keep inflow
and outflow clear
See Impeller touching
Replace bearing
Perform maintenance
Check suitability of fan, Check/keep inflow
and outflow clear
See Impeller touching
Replace bearing
Check/keep inflow and outflow clear. Determine
operating point (air volume + system pressure
loss) and compare with fan characteristic curve
Check/change connection
Replace bearing
Clean
Consider minimum distance on intake-side
13
Personnel qualification
Electrician
Specialist according to 1.6 / Manufact.
Electrician / Manufacturer
Manufacturer
Manufacturer
Electrician
Manufacturer
Electrician
Manufacturer or specialist company
authorised by manufacturer
Specialist according to section 1.6
Instructed personnel
Manufacturer
Manufacturer
Specialist according to section 1.6
Electrician
Instructed personnel
Manufacturer or specialist company
authorised by manufacturer
Specialist according to section 1.6
Specialist according to section 1.6
Specialist according to section 1.6
Manufacturer or specialist company
authorised by manufacturer
Specialist according to section 1.6
Specialist according to section 1.6
Manufacturer or specialist company
authorised by manufacturer
Specialist according to section 1.6
Electrician
Manufacturer or specialist company
authorised by manufacturer
Instructed personnel
Specialist according to section 1.6
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