vol tage to pull in without
chatter. If the problem is
a recurring one, measure
voltage with re cord er on a
24 hour basis.
b. Contactor may have dust
around magnet of coil
struc
ture. Dry or clean
as re quired.
c. Make sure the floats
are located away from
any turbulence.
d. Dry out the junction box
(if furnished); moisture in
the junction box may tend
to cause relays to energize
intermittently.
6.
Nuisance tripping of
overload on motor starters
or circuit breakers.
a. Check all reset buttons and
tripped breakers.
b. Check pump amp draw with
amp probe and compare to
nameplate amps on pump.
c. The impeller may be locked
up due to excessive debris
or solids.
d. Possible motor failure (fault
on windings).
e. Pump may be miswired to
terminal blocks.
7. Short cycling pump.
a. Check float controls.
8. Run light stays on.
a. Selector switch may be in
the Hand position.
9. Test for blown fuse.
a. Check for continuity with a
V-O-M set on ohm scale.
Single Phase Pump Only:
Connections and start
components
WARNING: Disconnect all
power from the panel before
making these checks.
1. Motor winding resistance
readings.
a.
Disconnect all three
motor leads.
b. Using a volt-ohm meter,
with the scale set on RX1,
measure the resistance
be tween the leads with the
following chart.
Typical
Motor Resistance
Winding Leads Reading
Main
Black to Lowest
White
Start
Black to
Next
Red Lowest
(Middle)
Both
White to Highest
Red
2. Capacitor Check.
a. Make sure the capacitors
are discharged. Use extreme
caution; severe shock hazard
may exist with capacitors.
b. Disconnect the capacitor
leads and connect a
volt-ohmmeter to the
capacitor terminals.
c. The meter should indicate
low ohms when it is
first connected, but as the
ca pac i tor becomes charged
(by the meter), it will return
to a reading of infinity
(open circuit).
NOTE: Set the meter on the
RX10,000 scale to check
the run capacitor.
Set the meter on the
RX1,000 scale to check the
start capacitor.
3. Start relay check.
a. With power off, check the
start relay coil resistance. It
should be 3000 to 7000
ohms.
b. Turn power on and run
pump in Hand position.
After the pump starts, check
the voltage from terminal
1 to terminal 2 on the start
relay to be sure that the
relay has operated. The
voltage from terminal 1 to
terminal 2 on the start relay
must exceed 10 VAC. For
some pumps the voltage
may exceed 400 VAC. If
after 5 seconds the voltage
from terminal 1 to terminal
2 on the start relay does
not exceed 10 VAC, stop
the pump as damage to the
start capacitor will occur
in about 15 seconds. If the
start relay is not operating,
check the pump and the
system voltage to be sure
that they match. Check the
power wiring to ensure
that the pump is connected
properly. Start the pump
once more and check to
see if the voltage from the
terminal for the black wire
to the white wire is within
system tolerance. Call for
help if you cannot resolve
the problem.
4
Panel
Maintenance