•
Disconnect pump when power is interrupted or unstable.
•
To avoid overheating, don’t restrict the suction end to adjust flow.
•
Install a dry-run shut off switch to prevent damage.
•
If there are any abnormal noises, stop the pump immediately and
check the connections, hose clamps, etc.
•
If the pump will remain unused for an extended time, be sure to
drain the water to prevent damage from freezing water.
Problems
Possible Causes
Solutions
The pump does not run
•
Incorrect voltage.
Voltage must be
within ten volts of
the value specified
on the label)
•
Fuse or thermal
protector makes the
pump stop running
•
Check the voltage
on the label and
make sure the input
voltage is within 10
volts of that value
•
Check the fuse or
thermal protector
for damage
The pump does not
pump properly
•
The head is too high
•
The water level is
too low
•
Intake isn’t in water
•
No water
•
Leak in inlet or
outlet hoses
•
Make sure the head
isn’t too high
•
Verify the suction
head is in water
•
Prime the pump
The pump runs but no
water
•
Intake is blocked
•
Impeller is corroded
•
Intake isn’t in water
•
Pump isn’t primed
•
Leak in suction pipe
•
Check suction
height
•
Replace impeller
•
Prime the pump
•
Check for leaks
The flow reduces dras-
tically
•
Output/input pipes,
or intake could be
blocked
•
Water level is too
low
•
Impeller is damaged
or clogged
•
Clean or replace
intake screen, if
present
•
Check installation
height
•
Replace impeller
The motor is overheat-
ing, or, stops soon after
starting
•
Low voltage
•
Insufficient ventila-
tion in pump room
•
Verify supply
voltage under load
is within 10 volts of
the required voltage
(110 volts)
•
Improve ventilation
7)
Maintenance
:
8)
Troubleshooting
:
Summary of Contents for MHP75A
Page 12: ...MHP75A MHP150A Pump...
