Incorrect voltage (lower than
required).
Check voltage at the motor and
correct any sources of voltage drop
in the system. Check wiring to
ensure it is properly sized according
to National Electrical Code
requirements.
Incorrect wiring of the motor.
Ensure the motor is wired according
to the instructions contained in the
motor junction box. Correct
placement of the bridges is
necessary to configure your motor
for the proper voltage.
Motor starter is not set correctly or
is
too small for the application.
Check to ensure the motor starter is
set for the full load amps at the
operating voltage as indicated on
the
motor nameplate. Be sure to
multiply the full load amperage by
any service factor that appears on
the motor. If the current required is
outside the range of adjustability of
the starter, replace the starter with a
properly sized starter.
Motor starter trips too fast.
A motor starter with a high current
trip delay should be used to avoid
nuisance trips on startup.
Check and clean mesh as
necessary. Replace damaged
mesh.
Do not run the machine without the
inlet mesh in place, as even small
solids entering the pumping
chamber
can cause the unit to fail.
Leaks in the vacuum piping
Check process piping for leaks. To
confirm the leaks are in the piping,
run the pump isolated from the
piping and confirm pump reaches
ultimate vacuum per the data
sheets. If the pump does meet the
ultimate vacuum, then there is a
problem in the piping that must be
corrected. A rate of rise test can be
run to determine the leakage rate.
Leaks can be found by a soapy
water or smoke test..
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