Little Giant MDP-1 Manual Del Propietário página 5

MAINTENANCE
Periodic Service
Risk of severe injury or death by electrical shock, high temperatures,
or pressurized fluids.
• Always unplug the pump power cord in addition to removing the fuse or shutting off the circuit breaker before
working on the pump or switch.
• Let pump cool for a minimum of 2 hours before attempting to service. Submersible pumps can become pressur-
ized and hot under normal operating conditions.
Risk of damage to pump or other equipment.
• Do not remove the motor housing cover.
• Do not remove the impeller. This action requires special tools and may damage the pump.
Rinse and flush the pump with clean water completely after each use in salt water and any type of acid
wash.
1. Disconnect the pump from electric power.
2. Disconnect the discharge hose from the pump.
3. Unscrew the four clamp screws and remove the screen.
4. Remove the screws that hold the volute to the motor housing.
5. Remove the volute, being careful not to lose the seal ring.
6. Clean the impeller and the volute passage.
NOTE: Do not use strong solvents on the impeller.
7. Be sure the impeller turns freely after cleaning.
8. Replace the seal ring into the volute and secure the volute to the motor housing with screws.
9. Replace the screen onto the volute.
Troubleshooting
Problem
Pump does not turn on
Pump runs but does
not discharge liquid
Pump does not deliver
rated capacity
Probable Causes
Pump not connected to electrical power
Circuit breaker off or fuse removed
Defective motor
Lift too high for pump
Starting depth of water too shallow
Inlet to impeller plugged
Lift too high for pump
Low voltage, speed too slow
Impeller or discharge pipe is clogged
Impeller wear due to abrasives
Periodic Service
Corrective Action
Connect pump to a dedicated circuit
equipped with GFCI.
Turn on circuit breaker or replace fuse.
Replace pump.
Check rated pump performance.
Add water to pool.
Pull pump and clean.
Check rated pump performance.
Check that supply voltage matches the
nameplate rating.
Pull pump and clean. Check pipe for
scale or corrosion.
Replace pump.
MAINTENANCE
5