Bell & Gossett IM194R03 Grinder Pumps, Single and Three Phase, 1-1⁄4″ Discharge - Manual (Page 10)

10
TROUBLESHOOTING
FAILURE TO DISCONNECT AND LOCKOUT ELECTRICAL
POWER BEFORE ATTEMPTING ANY SERVICE CAN CAUSE
SHOCK, BURNS OR DEATH.
SYMPTOM PROBABLE CAUSE RECOMMENDED ACTION
MOTOR NOT RUNNING Motor thermal protector tripped. Allow motor to cool. Insure minimum pump
submergence. Clear debris from casing and impeller.
Open circuit breaker or blown fuse. Determine cause, call a qualified electrician.
Pump impeller binding or jammed. Check motor amp draw. If two or more times higher
than listed on pump nameplate, impeller or cutter is
a) Manual operation Power cable is damaged. locked, motor bearings or shaft is damaged. Clear
Inadequate electrical connection debris from cutter casing and impeller, consult with
in control panel.
dealer.
Resistance between power leads and ground should
b) Automatic operation No neutral wire read infinity. If any reading is incorrect, call a
connected to control panel. qualified electrician.
Inadequate electrical connection Inspect control panel wiring. Call a qualified
in control panel. electrician.
Defective liquid level switch. With switch disconnected, check continuity while
activating liquid level switch. Replace switch, as
required.
Insufficient liquid level to Allow liquid level to rise 3" to 4" (76 mm - 101 mm)
activate controls. above turn-on level.
Liquid level cords tangled. Untangle cords and insure free operation.
PUMP WILL NOT Liquid level cords tangled. Untangle cords and insure free operation.
TURN OFF
Pump is air locked. Shut off pump for approximately one minute, then
restart. Repeat until air lock clears. If air locking
persists in a system with a check valve, a 3 ⁄
16
" (4.8 mm)
hole may be drilled in the discharge pipe approximately
2" (51 mm) above the discharge connection.
Influent flow is matching pump’s Larger pump may be required.
discharge capacity.
LITTLE OR NO LIQUID Check valve installed backwards, Check flow arrow on valve and check valve
DELIVERED BY PUMP plugged or stuck closed. operation.
Excessive system head. Consult with dealer.
Pump inlet plugged. Inspect and clear as required.
Improper voltage or wired Check pump rotation, voltage and wiring.
incorrectly. Consult with qualified electrician.
Pump is air locked. See recommended action, above.
Impeller is worn or damaged. Inspect impeller, replace as required.
Liquid level controls defective Inspect, readjust or replace as required.
or improperly positioned.
PUMP CYCLES Discharge check valve inoperative. Inspect, repair or replace as required.
Sewage containment area too small. Consult with dealer.
Liquid level controls defective or Inspect, readjust or replace as required.
improperly positioned.
Influent excessive for this size Consult with dealer.
pump.
NOTE: If circuit breaker
“OPENS” repeatedly,
DO NOT reset. Call
qualified electrician.
NOTE: Check the pump in
manual mode first to confirm
operation. If pump operates,
the automatic control or
wiring is at fault. If pump
does not operate, see above.
CONSTANTLY
WARNING
Hazardous
voltage
TROUBLESHOOTING