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© Copyright 2008 Zoeller Co. All rights reserved.
General Maintenance
Service Checklist
Electrical precautions. Before servicing a grind er pump, always shut off the main power circuit. Make sure you are wearing
insulated protective sole shoes and not stand ing in water. Under
fl
ooded conditions, con tact your local electric company or a quali
fi
ed
licensed electrician for dis con nect ing electrical service to the pump prior to re mov al.
Grinder pumps contain oil which becomes pressurized and hot under operating conditions. Allow 2½ hours after shut
down before servicing pump.
Condition
A. Pump will not start or run.
B. Motor overheats and trips on overload.
C. Pump will not shut off.
D. Pump operates but delivers little or no water.
E. Pump starts and stops too often.
F. Large red
fl
ashing light comes on at control box.
G. Grease and solids accumulate in pit around pump.
MAIL TO:
P.O. BOX 16347
Louisville, KY 40256-0347
SHIP TO:
3649 Cane Run Road
Louisville, KY 40211-1961
(502) 778-2731 • 1 (800) 928-PUMP
FAX (502) 774-3624
Manufacturers of . .
www.zoeller.com
GENERAL SYSTEM INSPECTION
Before the system is placed into operation, it should be inspected by
a quali
fi
ed tech ni cian.
Wiring and grounding must be in accordance
with the National Electrical Code and all applicable local codes
and ordinances.
LUBRICATION PROCEDURES
No lubrication is required.
If pumps are to be stored for more than six months, refer to short term
storage procedure in the Operation section.
PREVENTIVE MAINTENANCE
Preventive maintenance is recommended to ensure a long service life
from the product. Provided is a suggested main te nance schedule.
Every month:
• Check for proper and unobstructed
fl
oat operation.
• Listen for proper check valve operation.
Every 3 months:
• Inspect and test system for proper operations.
Repair and service should be performed by a Zoeller
Pump Company Authorized Service Station only.
SAFETY PROCEDURES
For your protection, always disconnect pump
and pan el from its power source before handling.
Never enter the basin until it has been properly
vented and tested. Any person entering a basin should be wear-
ing a harness with safety rope extending to the surface so that
they can be pulled out in case of as phyx i a tion. Sewage water gives
off methane and hydrogen sul
fi
de gases, both of which can be highly
poi son ous.
Installation and checking of electrical circuits and hardware should be
per formed by a quali
fi
ed electrician.
Pump is never to be lifted by power cord.
Unit must be cleaned and disinfected, inside the
pump ing chamber and all exterior surfaces, prior to ser vic ing.
Common Causes
Blown panel or circuit breaker fuse, low voltage, thermal overload open, defective
capacitor circuit, cutter or im pel ler clogged,
fl
oat switch held down or de fec tive,
incorrect wiring in control panel, water in cap assembly.
Incorrect voltage, impeller or cutter blocked, negative head (dis charge lower
than intake of pump). Defective “off”
fl
oat. Pump runs con tin u ous ly at low water
level. Low oil level in motor shell.
Air lock, debris under
fl
oat assembly, defective switch, in com ing sewage
exceeds ca pac i ty of pump.
Intake clogged with grease or sludge, pump air locked (clear vent hole), low or
in cor rect voltage, clogged dis charge line, operating near shut-off head.
Check valve stuck open or defective. Sump pit too small to handle incoming
sewage. Level control out of adjustment. Thermal overload tripping.
High water in pit. Check pump for clogging, or overload trip. On single phase
pumps, check the start capacitor in the control panel. See “A” and “D” above.
Break up solids and run pump with water running into the pit. Allow level to lower
to the pump intake. Continue until solids are cleared from the pit.
Do not drain kitchen grease down the sink.
