11
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 power
volt
age and control
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
contactor
coil
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 move 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 may be re
verse
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 us
ing a
volt me ter. This low voltage
condition may cause severe
chat ter ing and burnout of
contactors and relays.
2. Contactor may have dust
around magnet of coil
struc
ture. Dry or clean
as re quired.
3.
Check voltage to the
control panel. Contactors
require a minimum of
85% of full volt age to pull
in without chatter. If the
problem 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); moisture
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 of
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
current
unbalance. Three phase
only. Voltage un bal ance on
three phase power sources
can cause motor current to
become un bal anced and
exces
sive heating will
re
sult. Trip
ping of the
over
load protectors and
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:
