Pentair MYERS MSE50 Manual De Instalación Y Servicio página 3

Pump
Servicing
Servicing should be performed
only by knowledgeable pump
service contractors or
authorized service stations.
1. Remove pump from sump.
Before removing pump
from sump pit for repair,
check if the trouble could
simply be a blown fuse,
tripped circuit breaker, or a
power cord not completely
inserted into the receptacle.
2. Check switch.
3. Check for impeller blockage.
Disconnect pump from
power source. Check for an
obstruction in the impeller
cavity by laying the pump
on its side and inserting a
screwdriver into impeller.
Impeller should turn freely.
If impeller is stuck, then
turn the pump on its side,
DRAIN THE OIL through
the oil fill plug on top of
the pump. Drain oil into
a clean, dry container. A
milky appearance to the
oil indicates that water
has entered through either
worn out or damaged seals
(7) or seal ring. Remove the
3 screws (9) to remove the
volute (2). If the impeller (8)
does not rotate freely, clear
the impeller and cavity walls
before reassembling the
base. Repeat Step 2.
4. Check power cord. If the
above tests have not
resolved the problem, it
may be in the electrical
components of the pump.
Starting with the power
cord (19), inspect for cuts or
nicks in the insulation. If the
cord is damaged – replace
it!
5. Remove the motor cover.
Use a screw driver to
pry the motor cover (10)
from the seal plate (1) at
the fastening ears, being
careful not to cut the seal
ring with the screwdriver
or crack the motor cover.
Lift the motor cover until it
clears the stator (3).
6. Check for short. Disconnect
the stator leads from
the connector. Use an
ohmmeter to check the
continuity of the stator. If
stator fails to pass the
continuity test, it must
be replaced.
Ground check. Set
ohmmeter scale pointer to
R X 100K scale and check
meter by putting both
meter leads together and
adjusting the
needle knob until meter
reads zero. If meter cannot
be adjusted to zero it will
indicate that batteries in
meter must be replaced.
Always make this test
with the meter when scale
pointer is set to a new scale
before making any checks
on motor.
Now connect one meter
lead to one blade terminal
of stator and touch other
meter lead
to motor stator shell (3).
If needle reads below 5
(500,000 ohms) stator
must be dried out before
reusing. To dry out, bake
in 220° oven for 4 hours.
Recheck after motor
cools. If motor is new or
thoroughly dry, needle of
ohmmeter will not move
on the ground test. This
indicates a reading of 50
megohms or higher. One
megohm is one million
ohms.
When making the ground
test, if the needle goes
clear to zero the motor
probably has a wire
touching the stator at some
point and the stator will
have to be replaced.
7. Remove the stator. To
remove the stator, remove
the four hex head screws
(4) and disconnect the
capacitor leads from the
capacitor. Lift the stator off
the seal plate (1) and set
aside.
8. Remove the impeller. To
remove the impeller (8),
hold the rotor shaft (5)
with a screwdriver at the
center of the impeller and
tap the impeller with a
plastic or rubber mallet
so as to turn the impeller
counterclockwise.
9. Check the seal. Remove the
rotating portion of seal
(7) from shaft by inserting a
screwdriver under the edge
of the seal and lifting it off.
Inspect the seal face for any
nicks or an uneven seating
of seal face. If any are
present, replace the seal.
(See Step 14.)
Full Load Amps:
115 Volt ....................... 9 Amps
230 Volt .................... 4.6 Amps
10. Remove rotor. Tap the rotor
shaft (5) at the impeller
end of the shaft with a
plastic mallet to remove
the rotor and shaft. Inspect
the bearings. If they do not
rotate freely and smoothly,
they should be replaced.
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