FPS IGP-A Serie Manual Del Propietário página 9

Troubleshooting
Problem
Pump is not wired correctly
Circuit breaker is off or fuse is removed
Accumulation of trash on float
Pump does not turn on
Float obstruction
Defective switch
Defective motor
Float or float rod obstruction
Pump is air locked
Pump will not shut off Liquid inflow exceeds pump capacity
Loose connection in level control wiring
Defective switch
Check valve installed backwards
Check valve stuck or plugged
Pump runs but does
not discharge liquid Lift too high for pump
Inlet to impeller plugged
Pump is air locked
Lift too high for pump
Low voltage, speed too slow
Pump does not deliver
rated capacity
Impeller or discharge pipe is clogged
Impeller wear due to abrasives
No check valve in long discharge pipe allowing water to drain back
into basin
Pump cycles continu-
ally Check valve leaking
Basin too small for inflow
Water sprays out of a This pump comes with a bleed hole that allows trapped air to
hole by a bolt on the escape from the pump, preventing air lock. Water spraying out of
base of the unit this hole is completely normal
Too-rigid piping attachments
Pump is noisy Cavitation caused by pump being run below the minimum head
The pump runs backwards
Improper wiring in junction box
Circuit breaker trips
Obstruction inside volute causing impeller to be locked
Obstructed pump impeller
Switch stuck in the ON position
Pump running dry
Pump air-locked
Pump short cycling
Protector tripping
Excessively high or low voltage supply
(motor overloading/
Inadequate wiring
overheating)
Incorrect motor connections
Misapplication of the product
Operating the pump at low heads (low discharge restriction)
Pump, motor, bearings, or seal have reached the end of their use-
ful life
Probable Causes Corrective Action
Check wiring diagram and connections.
Turn on circuit breaker or replace fuse.
Clean float.
Clean float path and provide clearance.
Replace switch
Replace pump.
Check float and float rod path and provide clearance.
Remove pump and clean air bleed hole.
Larger pump required.
Check control wiring for loose or improper connection.
Replace switch.
Check flow-indicating arrow on check valve body to ensure proper
installation.
Remove check valve and inspect for proper installation.
Check rated pump performance.
Pull pump and clean.
Remove pump and clean air bleed hole.
Check rated pump performance.
Check that supply voltage matches nameplate rating.
Pull pump and clean. Check pipe for scale or corrosion.
Replace impeller.
Install a check valve in the discharge line.
Inspect check valve for correct operation.
Install larger basin.
No corrective action is required.
Use a connector or rubber hose to replace part of the discharge line.
Replace the pump.
Replace the pump. Interchange any two of three wires.
Check wiring in junction box.
Remove volute to check impeller. Refer to
Pull pump and clean.
Clean float path and provide clearance.
Ensure the pump has an adequate inflow supply.
Shut power off for approximately 1 minute, then restart. Repeat sev-
eral times to clear air from pump.
Inspect check valve for proper installation and operation.
Refer to "Specifications" on page 3.
Refer to "Electrical Connections" on page
Inspect fixtures, inlets, and outlets for leaks. Repair and correct
application as needed.
Confirm pump performance and recheck sizing calculations.
Replace pump.
MAINTENANCE
Troubleshooting
"Disassembly" on page 8.
5.
9