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Craftsman 390.306062 Owner's Manual page 6

Battery operated backup sump pump

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4. The charger
is equipped
with aiself-resetting
circuit
breaker which protects
it from teanporary overloads. In
case of an overload, the circuit breaker will open. It au-
tomatically resets after a short cool<lown period. In some
conditions
where the overload is extended
the breaker
will cycle, repeating the open/reset process Indefinitely.
When this happens, normally the charger will emit a dick-
ing sound as the breaker opens and resets.
NOTICE: If the clicking sound continues for more than
30 minutes or so, check for reversed charger connections
to the battery and for shorted cells in the battery.
BATTERY
MAINTENANCE
NOTICE:
To protect
battery
case from
chipping
and goug-
ing, do not let battery
sit on concrete
floor. Install battery
on
a shelf or protective
pad (plywood,
2x4s,
etc.). Always
in-
stall battery
in a dry location
that is protected
from flooding.
Every three months,
check
battery
as follows
to maintain
battery
in best condition:
1. Unplug
battery
charger.
2. On batteries
with removable
top caps, measure
specific
gravity of the electrolyte.
Use a hyclrometer
(available
at
auto parts stores).
If the specific
gravity of any cell is less
than 1.225 or if there is more than .050 variation
between
cells, replace
the battery.
3. Check
electrolyte
level and refill as needed.
4. Check battery
terminals
and clamps for tightness
and cor-
rosion.
Clean and tighten as needed.
5. Plug in battery
charger.
TROUBLESHOOTING
Pump won't
run.
I. Check all connections.
2. Check for low or defective battery.
3. Check that automatic
switch is free to swing up and
down.
4. Blown fuse in switch circuit. Unplug pump and check to
Figure
5
see if impeller is free to turn. Ifimpeller is locked, remove
the housing
around the impeller and remove the ob-
struction. Reassemble pump and reconnect.
Replace fuse.
Motor
hums
but pump
won't
run:
1. Check for low or defective battery.
Pump runs but pumps very tittle or no water:
1. Make sure a check valve is installed and functioning
be-
tween primary pump discharge and Backup Sump Pump
tee.
Figure
6
2. Check for obstruction in discharge pipe.
3. Discharge pipe length and/or height exceeds
capacity
of
pump. See Table I, Page 4, for pump capacity.
4. Check for low or defective battery.
Figure
7
Pump cycles too frequently:
..
1. Tether length too short on automatic float switch. Make
sure that tether is at least 2"; see Figure 2.
2. Main check valve located between discharge of primary
pump and the Backup Sump Pump tee or check valve not
installed or working properly. Install or repair as required.
SWITCH
REPLACEMENT
1. Unplug
battery
charger
from wall outlet.
2. Disconnect
both battery
daml_s
from battery
terminals.
3. Unbolt
black switch
wire from battery
clamp.
4. Unplug
fuse holder
in white
wire; save fuse.
5. Make a note of tether length
(see Figure 2) before
loos-
erring cord clamp.
6. Remove
cord
from
cord
clamp
and replace
with
new
cord.
Make
sure
tether
length
is the same
as the old
switch's
tether.
7. Strip insulation
off of white wire on new switch,
leaving
3/8" bare wire'exposed
at the wire end (see Figure 5).
8. Insert stripped
wire end in small end of fuse holder
half;
crimp
holder
onto wire
and check
crimp
for tightness
(Figure
6).
NOTICE:
Be sure that fuse holder
half which
you are in-
stalling will mate with fuse holder
half on pump
wire.
9. Insert
fuse
into holder
and snap
halves
of housing
to-
gether
(Figure
7).
lO.Remount
block
on band
and
cord clamp
assembly
on
pump.
11. Strip black swifch wire back 3/8" from end of wire. Crimp
wire terminal
onto end of wire and check for tightness.
12. Bolt black switch
wire onto battery
terminal clamp.
13. Reinstall
battery
clamps:
A. Black switch
wire damps
to positive
battery
terminal.
B. Black pump
wire clamps
to negative
battery
terminal.
NOTICE:
DO NOT reverse terminal
connections.
14.Turn
pump
upside
down;
unclip
and remove
screen.
Do
not remove
screw-mounted
bottom
plate.
Lift switch
to
momentarily
"bump"
pump.
Check for correct
operation
and
rotation
(pump
must
rotate
counter-clockwise
when
looking
at end of shaft - Figure 8). If not, reverse
wires
to battery
and recheck.
Figure 8
6

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