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applicable to a given installation.
The user should exercise
judgment in defining specific
requirements based on this guide.
1. Fuses for control transformer
primary and secondary.
(If required)
2. Contactor.
3. Bulbs for any light requiring
a bulb.
4. Control transformer.
(If required)
5. Alternator relay. (If required)
Float Controls
Optional: The low water/
redundant off float should
be installed just above where
the pump begins to ingest air
normally; this is about the top of
the volute.
The off float should be installed
about halfway down the pump. If
a low water/redundant off float is
used, then the off float should be
installed a minimum of 4 inches
above the low water/redundant
off float.
Install the on/lead floats a
minimum of 4 inches above the
off float. If additional volume
is to be pumped on each cycle
or if the pump running time for
each cycle needs to be increased,
then increase the distance from
the on/lead float to the off float
as needed.
Install the high water float
4 inches above the on/lead float.
For duplex systems install the
lag/override float 4 inches above
the high water float.
On duplex systems where
both pumps have to run on a
daily basis to keep up with the
incoming flow, then the high
water and the lag/override float
position should be reversed.
4
Troubleshooting
1. Pump does not run in
Hand position.
a. Check pump circuit
breaker and control
fuse for tripping or
blown condition.
b. Check incoming power
voltage and control
circuit voltage.
c. Check overload relay to see
if it is tripped. Reset relay
if tripped and check pump
current with amp meter.
d. With the power off,
check motor heat
sensor continuity.
e. Check wiring of pump to
control panel. It should
agree with the schematic.
f. Check contactor
coil resistance.
2. Pump does not run in
Auto position.
a. Check items above in #1.
b. Floats may be miswired to
control panel. Check float
type (N.O. or N.C.) and
hook up by referring to the
schematic. If the start and
stop floats are hooked in
reverse, pump will short
cycle and will not pump the
level down.
1. Check if the water level in
the system is high enough
to activate the floats.
2. If there is enough water in
the system (with the power
turned off), mark and
disconnect the off and on
floats. Next, install jumper
wires in the terminal blocks
for off and on floats. Turn
power back on, put H-O-A
switch in Auto and see if
pump runs.
3. If pump runs with
jumper, problem is with
floats. Remove jumpers
and troubleshoot floats
with ohmmeter.
4. If pump does not run in
Auto mode with jumpers,
check Auto circuit wiring
in panel.
3. Pump runs, but run light
does not energize.
a. Remove light and check
with an ohmmeter.
b. Check run light wiring.
4. Pump runs but does not
pump down the wet well.
a. On three-phase only,
pump rotation may be
wrong. Wiring of pump
to control panel may be
reverse sequenced.
b. Impeller may be dragging
in volute due to solids.
High amperage draw
would identify this.
c. Refer to the pump manual
for other possibilities.
5. Severe humming/
chattering of contactors
and control relays.
a. There may be low
voltage. Check voltage
at primary and secondary
of control transformer
using a voltmeter. This
low voltage condition may
cause severe chattering
and burnout of contactors
and relays.
b. Contactor may have dust
around magnet of coil
structure. Dry or clean
as required.
c. Check voltage to the
control panel. Contactors
require a minimum of
85% of full voltage to
pull in without chatter. If
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