Maintenance - Franklin Electric SubMonitor Manual De Instalación

Maintenance

Symptom
SubMonitor Dead
SubMonitor's Screen
Does Not Change from
Franklin Electric Screen
Display reads
"Phase Reversal"
Tripped Light On
Control Circuit Fuse
Blows
SubMonitor Contactor
Will Not Close
Contactor Hums or
Chatters
Contactor Opens When
Start Switch is Released
Contactor Closes But
Motor Doesn't Run
Possible Cause or Solution
If the line voltage is correct at the SubMonitor's L1, L2 and
L3 terminals and the display is blank, remove display and
check cable connections. If cable connections are ok, then
SubMonitor is malfunctioning.
Check for a broken or disconnected communications cable
from base to display. If cable is ok, then SubMonitor is
malfuctioning.
SubMonitor has a built-in phase sequence meter to assure
once properly installed, a change in incoming power sequence
cannot cause the pump to run backwards. If the display reads
"Phase Reversal" the SubMonitor thinks the motor will run in
the wrong direction.
On a new installation, after verifying proper motor rotation,
switch power leads L1 and L2 on top of the SubMonitor. DO
NOT CHANGE THE MOTORS LEADS.
On an old installation that was working fine, verify proper
motor rotation and/or switch motor leads T1 and T2 at the
starter as needed. DO NOT CHANGE THE SUBMONITOR
POWER LEADS.
Whenever the pump is off as a result of SubMonitor protective
function, the red tripped LED (light) on the display and base will
turn on.
With power turned off, check for a shorted contractor coil or a
grounded control circuit lead. The coil resistance should be at
least 10 ohms and the circuit resistance to panel frame should
be over 1 megohm. A standard or delay-type 1.5 Amp fuse
should be used.
If proper voltage is at the control coil terminals when controls
are operated to turn the pump on, but the contactor does not
close, turn off power and replace the coil. If there is no voltage
at the coil, trace the control cirucit to determine if the fault is in
the fuse, wiring or panel operating switches. This tracing can
be done by first connecting a voltmeter at the coil terminals and
then moving the meter connections step by step along each
circuit to the power source, to determine at which component
the voltage is lost.
Check that coil voltage is within 10% of rated voltage. If voltage
is correct and matches line voltage, turn off power and remove
the contactor magnetic assembly to check for wear, corrosion
or dirt. If voltage is erratic or lower than line voltage, trace the
control circuit for faults similar to the previous item, but looking
for a major drop in voltage rather than its complete loss.
Check that the small interlocks switch on the side of the
contactor closes when the contactor closes. If the switch or
circuit is open, the contactor will not stay closed when the
selector switch is in HAND position.
Turn off power. Check the contactor contacts for dirt, corrosion
and proper closing when the contactor is closed by hand.
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