31
Faults: causes and elimination
Fault
Reason
Countermeasure
Jurisdiction
Machine does not
start
(makes no noise)
Interruption of at least 2 lines of the power
supply
Check the functionality of fuses, terminals
or supply lines
Electrician
Mains voltage/frequency do not match the
motor data
Check the motor rating plate data, change
the supply voltage
Electrician
Connection to the motor terminal board is
not correct
Check the terminal board wiring
Electrician
Motor circuit breaker is too small or set too
low
Change the trigger value of the circuit
breaker or replace the circuit breaker.
Electrician
Overload
Reduce throttling
qualified technician*
Machine does not
start
(makes noise)
Interruption of a line of the power supply
Check the functionality of fuses, terminals
or supply lines
Electrician
Impeller is stuck
Open and clean compressor lid
AIRTECH Service
Roller bearing defective
Change roller bearing
AIRTECH Service
Circuit breaker of the
motor triggers after
switching on again.
Motor overloaded
Reduce throttling. Clean filters, silencers,
air supply lines.
qualified technician*
Short circuit in the winding
Check winding
Electrician
Impeller is stuck
Open and clean compressor lid
AIRTECH Service
No or too low pres-
sure difference
Wrong direction of rotation
Check direction of rotation, exchange con-
necting cables if necessary
Electrician
Machine is leaking
Seal the system
qualified technician*
Radial shaft seal ring is defective
Change radial shaft seal ring
AIRTECH Service
Intake filter or air supply is blocked.
Clean filters, sieve, silencers, air supply
lines.
qualified technician*
Density of the conveyed medium is higher
or lower than permitted.
Conversion of pressure values, contact
with the manufacturer
qualified technician*
Impeller dirty
Clean impeller, have it replaced when worn
AIRTECH Service
Unusual flow noise
Flow speed too high
Clean pipes or hoses or enlarge cross sec-
tion.
qualified technician*
Silencer dirty
Clean silencer.
qualified technician*
Vibrations or unusual
running noise
Roller bearing defective
Renew roller bearing
AIRTECH Service
Too high vibration
Spring elements defective
Renew spring elements
qualified technician*
Machine is leaking
Radial shaft seal ring defective
Renew radial shaft seal ring
AIRTECH Service
Seal on the silencer is defective or screws
are loose
Check seal and replace if necessary or re-
tighten screws.
qualified technician*
Machine gets too hot Insufficient cooling air flow
Clean fan cowl, fan outlet and cooling fins.
qualified technician*
Check minimum clearances (see chapter
“Installation”)
Insufficient flow rate of conveyed medium Provide a suitable vacuum or pressure re-
lief valve.
qualified technician*
Intake filter or air supply is blocked.
Clean filters, sieve, silencers, air supply
lines.
qualified technician*
Intake or ambient temperature too high
Check ambient conditions, compare with
rating plate data
qualified technician*
* These repair works may be carried out by qualified personnel if the repair instructions are available
If you have any other problems, contact AIRTECH Europe.
