4.2.3 Possible Cause
Bearing noise
Remedy: replace bearings or call Airtech Inc. for exchange program.
4.3 Problem
Pump starts, but labors and draws high amperage.
4.3.1 Possible Cause Oil
is too viscous.
Remedy: drain and change with fresh oil.
4.3.2 Possible Cause Exhaust
filter is clogged.
Remedy: replace exhaust filters, maintain proper oil condition, oil level and use ATO oil. -make sure
inlet filter is operational preventing particulate carryover.
4.3.3 Possible Cause
Loose connection in motor terminal box wired for wrong voltage.
Remedy: check wiring diagram for proper connections; tighten or replace loose connections.
4.3.4 Possible Cause
Foreign particles in pump. Broken vanes or seized bearings.
Remedy: overhaul pump or call Airtech Inc. for exchange program.
4.3.5 Possible Cause
Pump is overfilled with oil or wrong kind of oil is in pump.
Remedy: drain oil; use correct type of ATO oil.
4.3.6 Possible Cause
Pump runs in wrong direction.
Remedy: check for correct rotation. If incorrect, switch any two leads.
4.4 Problem
Pump will not start.
4.4.1 Possible Cause
Supply voltage is not proper or is overloaded. Motor starter overload settings are too low or improper;
fuses are burned; wire size is to small or too long causing a voltage drop.
Remedy: check voltage supply; overload settings in motor starter for size and settings according to
motor nameplate. Install proper size wire. If ambient temperature is high, use the next larger size
overloads or adjust settings 5% above motor nameplate valve.
Remedy: turn pump fan by hand. If it will not turn, remove motor from pump and check motor and
pump separately. Repair or replace if needed or call Airtech Inc. for exchange program.
4.5 Problem
Pump smokes at the exhaust side or expels oil droplets from the exhaust.
4.5.1 Possible Cause
-Exhaust filters are not properly installed with O-ring; Filter media is damaged. Remedy:
check exhaust filter placement and replace if needed.
4.5.2 Possible Cause
Exhaust filters are clogged with foreign particles.
Remedy: replace filter and O-ring.
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