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Pump
Specifications
General specifications:
Size: H = 5.9", W = 7.2", D = 3.5'
Weight: 1.8 lbs.
Operating Temperature:
–20 C to +70 C
Storage Temperature:
–30 C to +80 C
Input Power: 120 +/- 10%
50–60 Hz. 0.3 amp max.
Pump
Troubleshooting
WARNING: Before handling
these pumps and controls, always
dis con nect the power first. Do
not smoke or use sparkable
electrical devices or flames in
a septic (gas eous) or possible
septic sump.
A. Pump does not run in
Hand position.
1. Check pump circuit breaker
and control fuse for trip ping
or blown condition.
2. Check
incoming
volt age
and
cir cuit volt age.
3. Check overload re lay to see
if it is tripped. Reset relay
if tripped and check pump
current with ammeter.
4. With the power off, check
motor heat sensor continuity.
5. Check wiring of pump to
con trol panel. It should
agree with the sche mat ic.
6. Check
re sis tance.
B. Pump does not run in
Auto position.
1. Is water level in the
sys tem high enough to
ac ti vate the control?
C. Pump runs, but run light
does not energize.
1. Re m ove light and check
with an ohmmeter.
2. Check run light wir ing.
D. Pump runs but does not pump
down the wet well.
1. On three phase only,
pump rotation may be wrong.
Wiring of pump to con trol
pan el
sequenced.
2. Impeller may be dragging
in volute due to sol ids.
High am per age draw would
identify this.
3. Refer to the pump manual
for other possibilities such as
closed discharge gate valve,
etc.
E. Severe humming/chat ter ing of
contactors and control relays.
1. There may be low voltage.
Check voltage at primary
and secondary of control
transformer
volt me ter. This low voltage
power
control
condition may cause severe
chat ter ing and burnout of
contactors and relays.
2. Contactor may have dust
around
struc ture.
as re quired.
3. Check
control panel. Contactors
require
85% of full volt a ge to pull
in without chatter. If the
problem
contactor
coil
may
be
re verse
us ing
a
magnet
of
coil
Dry
or
clean
voltage
to
the
a
minimum
of
is
a
re cur ring
one, measure voltage with
recorder on a 24 hour basis.
4. Make sure the transducer
is locat ed away from any
turbu lence.
5. Dry out the junction box
(if
furnished);
in the junction box may
cause relays to energize
intermittent ly.
F. Run light stays on.
1. Selector switch may be in the
Hand position.
G. Nuisance
tripping
over load on motor starters or
cir cuit break ers.
1. Check pump amp draw with
amp probe and compare to
nameplate amps on pump.
2. The impeller may be locked
up due to excessive debris or
solids.
3. Possible motor failure (fault in
windings).
4. Pump may be miswired to
ter mi nal block.
5. Voltage
and
unbalance.
Three
only. Voltage un bal ance on
three phase power sources
can cause motor current to
become
un bal anced
exces sive
heating
re sult.
Trip ping
over load
protectors
premature motor failures
can be expected if the
current unbalance exceeds
five percent.
Percent
Maximum Current
Current
= Difference from x 100
Unbalance
Average Current
_______________
Average Current
To determine if motor current
un bal ance is a function of the motor
or the power supply:
moisture
of
current
phase
and
will
of
the
and
11
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