Problem
Possible Causes
Solution
Pump has seized
Pump operated without enough oil
Call the factory for assistance. Have pump
model and serial number available.
NOTE
: If liquid is found to have been ingested
or if process vapor is condensing inside the
pump, protective measures must be taken. In-
stall trap or
fi
lter device on inlet of pump to
remove the contaminate from the air stream.
Liquid ingested into pump
Process vapor condensed inside pump
Pump operated in the wrong direction
for an extended period of time
Call the factory for assistance. Have pump
model and serial number available.
Pump motor draws high
amperage or pump starts but
labors
Pump operating in the wrong direction Make sure pump is operating in the proper di-
rection. See rotation arrow on the pump.
Ambient temperature too low for the
recommended oil
Multi-weight non-detergent oil may be re-
quired. Contact the factory for assistance.
The exhaust oil
fi
lter may be clogged
This can be checked by measuring the amount
of pressure between the exhaust side of the
pump cylinder and the exhaust oil separator(s).
The separator element(s) must be replaced
if this pressure is near 0.7 bar or greater (ap-
proximately 10 psig).
Pump is over
fi
lled with oil
Adjust oil level to proper setting or replace oil
with the correct type. Refer to Section 6.2 for
the correct oil type.
Oil tank has contaminated oil, or was
fi
lled with an incorrect type of oil
Loose wiring connection in the
electrical circuit
Check all connections and tighten or replace as
required.
Electrical circuit is not properly sized to
handle load
Wiring sized too small will create a voltage
drop large enough to produce over amperage
of motor. Check line voltage for unusually low
supply voltage.
Damaged motor
Consult a quali
fi
ed electrician for further diag-
nosis.
Worn bearing
Call the factory for replacement. Please have
the pump model and serial number available.
Process vapor condensing inside pump Stop pump, change oil and install protective
devices on inlet of pump to prevent recur-
rence.
Smoke/Oil Mist (emitted) from
exhaust (port)
Pump is over
fi
lled with oil
Adjust oil level to proper setting as recom-
mended in Section 3.2.
Exhaust
fi
lters not correctly seated or
installed
Check
fi
lters.
Pump operated at vacuum levels
outside the recommended range on a
continuous basis
Consult factory for assistance.
5.0 Troubleshooting (continued)
Lubricated Rotary Vane Laboratory Vacuum Systems
4107 9021 88.01
5-4
