Heart Interface HF12-1200 - Page 13

MOTORS
NOT
STARTING:
Because
of thelargesurgerequiredtogetthem
started,
itis
sometimes
difficulttopredict
exactly
which induction
motors
are within
the capacity of
the Heart.
We
have
foundthat
i/
3
horsepower capacitor-start
motors
will reliably
work
on the Heart,
even
in well
pump
applications.
If
a
problem
is
encountered
getting
a
motor
started the
first
thing
to do is
confirm that
your
battery voltage is
adequate
.
This must
be done while the motor
is attenrpting
ro srarr.
Use
a
volt meter
and watch the momentary voltage
drop while
you
start the
motor. If
the
voltage
is
dropping below
1 1.0 volts
this may be
why
the
motor will
not
start. Check all the
battery
connections
and
the state of charge of
the battery
bank.
If the connections
appear
solid
and
the battery bank is fully
charged, bur the voltage
drops below
11 volts,
you
may
want to consider
a
larger
battery
bank.
If
the
voltage
does not drop
below
11
volts,
but the motor will
not
start, the
addition
of
a
capacitor
across the
motor
may help.
Use
a motor-run capacitor
of about 3
uf.
MEASURING THE
OUTPUT VOLTAGE
WITH A METER:
You may measure
the output voltage
of
the
Heart with your
volt
meter,
however,
it is
possible
that
you
will not measure
the 119-121
AC
volts
RMS
that the
unit
provides.
This is
due
to the
output
wave
shape of
the
Heart,
which
can only be accurately
measured
with
a true
RMS
volt meter,
a
rather
specialized
instrument.
Do
not
be concqJned
about measuring
output voltage that varies
with
load
and battery
voltage, this is
normal
and
should
be expected
unless
you
have
a true RMS volt
meter.
When measured
with
a standard
volt meter you
can
expect readings
somewhere
between 90 and 140
volts,
and since
different
meters
contain
different measuring
circuits it
is impossible
to
predict
the
exact reading you
nray
get.
_
If
you
measure
the output voltage
with nothing plugged
into
the front
of
the
Heart you
will
get
a
very
low reading,
usually
between 20
and 30
volts
AC. This
is
the no-load
or
idle
state of the unit and is
perfectly
normal.
True
RMS voltage
in idle
is
about
55 volts AC.
.
A
Slod
ryay
to confirm
that
your voltage
regulation
circuit in
rhe Hearr
is working
is
to
observe the
brightness of an incandescent
light
bulb. If
the brightness
appears
about
thelame
as the
light plugged
into utility
power
or
a
generator,
then
you
know
the voltage
regulation
is correct.
A relatively
small change in
voltage
will
produce
a noriceable
changeln
light
output.
NO
OUTPUT
FROM
THE
HEART:
If
you
are
unable
to
get
any output voltage
from
the
Heart
the first
thing
you
need
to
check
is
the battery
voltage.
Confirm
that neither
dead batteries nor
bad conneciions
are
the
source
of the
problem.
If
the Heart
does
not hum
at all,
puts
out no
power,
and
displays
the
green
overload LED
continuously, you
should
contact
your
dealer
or
Heart
Interface.
t2