AirTech 3BA Series - Troubleshooting Chart

Bearings are grease-packed for life.
5.1 Troubleshooting Chart
Fault
Cause
Remedy
Responsible
Party
Motor does
not start, no
noise.
Two or more
power legs
interrupted
Check fuses, terminals, etc.. for
source of interruption and
correct.
Electrician
Motor does
not start,
humming
noise.
One power
supply lead
interrupted
Check fuses, terminals, etc.. for
source of interruption and
correct.
Electrician
Impeller is
jammed.
Open blower cover, remove
debris, clean.
Service
Technician
Check impeller clearance and
reset if necessary.
Defective
Impeller
Replace impeller. Service
Technician
Defective
Bearing
Replace defective bearing. Service
Technician
Trip of motor
starter at
start-up
Incorrect
starter setting
Ensure starter setting is correct
(check current on nameplate)
Electrician
Winding short-
circuit
Megger motor Electrician
Motor
overloaded
due to
operation of
pump at
excessive
differential
pressures.
Inspect filters, mufflers and
connection pipes and clean as
required.
Check relief valve operation.
Reset or replace as necessary.
Operator
Impeller
Jammed
See above fault Motor does not
start, humming noise, cause
jammed impeller.
Operator
Excessive
Power
Consumption
Lime or other
deposits
Decalcify or clean unit as
required (see Maintenance
Chart)
Operator
No Vacuum
or Pressure.
Severe leak in
system
Close off pump and run
deadheaded to confirm pump is
operating properly. If so, find
and fix leak in the system.
Operator
Wrong
direction of
rotation
Check air flow direction and
change direction of rotation if
necessary.
Operator
Electrician
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