AirTech 3AL - Troubleshooting Chart

19
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
Jammed
Free by hand (see
Maintenance Chart) or de-
classify unit if procedure is not
successful and contact Airtech
for assistance.
Operator
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
Discharge
pressure too
high
Measure discharge pressure if
possible or disconnect any
discharge piping and attempt to
run while discharging into the
room. Unclog piping or
increase discharge piping size
to eliminate pressure drop.
Operator
Impeller
Jammed
Free by hand (see
Maintenance Chart) or de-
classify unit if procedure is not
successful and contact Airtech
for assistance.
Operator
Excessive
Power
Consumption
Lime or other
deposits
Decalcify or clean unit as
required (see Maintenance
Chart)
Operator
No vacuum No operating
liquid
Check liquid level in separator.
Add as required to achieve
proper level.
Operator
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