Onan 305-0346 Product manual
Onon
Operators
and
Parts
Manual
12
and
24
Volt
•
Fully
Automatic
Constant
Voltage
Output
Current
Limiting
Charges
Lead-Acid
and
Nickel-Cadmium
Batteries
Models
(60
Hz)
•
Models
(50
Hz)
305-0346
305-0706
305-0347
305-0707
305-0395
305-0708
305-0398
305-0709
900-0100
7-85
Printed
in
U.SA
Safety
Precautions
The
following
symbols
in
this
manual
highlight
condi¬
tions
potentially
dangerous
to
service
personnel,
or
equipment
Read
this
manual
carefully.
Know
when
these
conditions
can
exist.
Then
take
necessary
steps
to
protect
personnel
as
well
as
equipment
ADANGER
This
symbol
if
used
warns
of
imme¬
diate
hazards
which
will
result
in
severe
personal
injury
or
death.
AWARNINP
•
This
s
Y
mbo1
r
e1
ers
fe
a
hazard
or
A4WHn
Va
i
unsa
f
e
practice
which
can
result
in
severe
personal
injury
or
death.
This
symbol
refers
to
a
hazard
or
unsafe
practice
which
can
result
in
personal
injury
or
product
or
property
damage.
|
A
CAUTION
Important
safety
instructions
(e)
Do
not
use
charger
to
supply
power
to
an
extra-low-
voltage
electrical
system
or
to
charge
dry-cell
batteries.
Charging
dry-cell
batteries
can
cause
them
to
burst
and
cause
injury
to
persons
and
damage
to
property;
e)
Ne
pas
utiliser
le
chargeur
pour
alimenter
un
reseau
electrique
tres
basse
tension
ni
pour
charger
des
piles
seches.
Le
fait
d’utiliser
le
chargeur
pour
charger
des
pi¬
les
seches
peut
entrainer
I’eclatement
des
piles
et
cau¬
ser
des
blessures
ou
des
dommages;
(f)
Never
charge
a
frozen
battery;
f)
Ne
jamais
charger
une
batterie
gelee;
(g)
If
necessary
to
remove
battery
from
generator
set
battery
tray
to
charge,
always
remove
grounded
termi¬
nal
from
battery
first.
Make
sure
all
switches
on
the
generator
set
control
panel
are
off
in
order
to
prevent
an
arc;
g)
S’il
est
necessaire
de
retirer
la
batterie
du
support
de
generateur
pour
la
charger,
toujours
debrancher
la
bor¬
ne
de
mise
a
la
masse
en
premier.
S’assurer
que
tous
les
interrupteurs
du
panneau
de
commande
du
genera¬
teur
sont
sur
arret
afin
d’eviter
la
formation
d’un
arc:
Instructions
importantes
concernant
la
securite
(a)
Save
these
instructions.
This
manual
contains
im¬
portant
safety
and
operating
instructions;
a)
Conserver
ces
instructions.
Ce
manuel
contient
des
instructions
importantes
concernant
la
securite
et
le
fonctionnement;
(b)
Working
in
the
vicinity
of
a
battery
is
dangerous.
Bat¬
teries
generate
explosive
gases
during
normal
battery
operation.
For
this
reason
it
is
of
the
utmost
importance
that
each
time
before
using
your
charger,
you
read
and
follow
the
instructions
provided
exactly;
b)
II
est
dangereux
de
travailler
a
proximite
d’une
batte¬
rie.
Les
batteries
produisent
des
gaz
explosifs
en
servi¬
ce
normal,
aussi
est-il
important
de
toujours
relire
les
instructions
avant
d’utiliser
le
chargeur
et
de
les
suivre
a
la
iettre;
(c)
To
reduce
the
risk
of
battery
explosion,
follow
these
instructions
and
those
marked
on
the
battery;
c)
Pour
reduire
le
risque
d’explosion,
lire
ces
instruc¬
tions
et
celles
qui
figurent
sur
la
batterie;
(d)
Never
smoke
or
allow
an
open
spark
or
flame
in
the
vicinity
of
the
battery
or
engine;
d)
Ne
jamais
fumer
pres
de
la
batterie
ou
du
moteur
et
eviter
toute
etincelle
ou
flamme
nue
a
proximite
de
ces
derniers;
(h)
Study
all
battery
manufacturer’s
specific
precau¬
tions
such
as
removing
or
not
removing
cell
caps
while
charging
and
recommended
rates
of
charge;
h)
Prendre
connaissance
des
mesures
de
precaution
specifies
par
le
fabricant
de
la
batterie,
p.
ex.
verifier
s’il
faut
enlever
les
bouchons
des
cellules
lors
du
charge-
ment
de
la
batterie,
les
taux
de
chargement
recomman-
des;
(i)
For
a
charger
having
an
output
voltage
selector
switch
the
user
is
to
be
instructed
to
determine
the
vol¬
tage
of
the
battery
by
referring
to
the
generator
set
man¬
ufacturer's
operator’s
manual
and
to
make
sure
the
out¬
put
voltage
is
set
at
the
correct
voltage.
If
an
output
vol¬
tage
selector
switch
is
not
provided,
the
user
is
to
be
in¬
structed
not
to
use
the
battery
charger
unless
the
battery
voltage
matches
the
output
voltage
rating
of
the
charger;
i)
Si
le
chargeur
comporte
un
selecteur
de
tension
de
sortie,
le
fabricant
doit
recommander
a
I’utilisateur
de
consulter
le
manuel
de
I’usager
du
fabricant
du
genera¬
teur
pour
determiner
la
tension
de
la
batterie
et
pour
s’assurer
que
la
tension
de
sortie
est
appropriee.
Si
le
chargeur
n’est
pas
muni
d’un
selecteur,
le
fabricant
doit
recommander
a
I’utilisateur
de
ne
pas
utiliser
le
char¬
geur
a
moins
que
la
tension
de
la
batterie
ne
soit
identi-
que
a
la
tension
de
sortie
nominale
du
chargeur;
ii
G)
Never
place
the
charger
directly
above
or
below
the
battery
being
charged;
gases
or
fluids
from
the
battery
will
corrode
and
damage
charger.
Locate
the
charger
as
far
away
from
the
battery
as
the
DC
cables
permit;
i)
Ne
jamais
placer
le
chargeur
directement
sous
la
bat-
terie
a
charger
ou
au-dessus
de
cette
derniere.
Les
gaz
ou
fluides
qui
s’echappent
de
la
batterie
peuvent
entrai-
ner
la
corrosion
du
chargeur
ou
I’endommager.
Placer
le
chargeur
aussi
loin
de
la
batterie
que
les
cables
c.c.
le
permettent;
(k)
Do
not
operate
charger
in
a
closed-in
area
or
restrict
ventilation
in
any
way;
k)
Ne
pas
faire
fonctionner
le
chargeur
dans
un
espace
clos
et/ou
ne
pas
gener
la
ventilation;
(l)
Connect
and
disconnect
DC
output
clips
only
after
setting
any
charger
switches
to
off
position
and
remov¬
ing
AC
cord
from
electric
outlet.
Never
allow
clips
to
touch
each
other;
l)
Mettre
les
interrupteurs
du
chargeur
hors
circuit
et
re-
tirer
le
cordon
c.a.
de
la
prise
avant
de
mettre
et
d’enle-
ver
les
pinces
du
cordon
c.c..
S’assurer
que
les
pinces
ne
se
touchent
pas;
(m)
Follow
these
steps
when
battery
is
installed
in
a
set
mounted
battery
tray.
A
spark
near
battery
can
cause
battery
explosion.
To
reduce
risk
of
a
spark
near
battery:
m)
Suivre
les
etapes
suivantes
lorsque
la
batterie
se
trouve
dans
un
support
de
batterie
incorpore.
Une
etincelle
pres
de
la
batterie
peut
provoquer
I’explosion
de
cette
derniere.
Pour
reduire
le
risque
d’etincelle
a
proximite
de
la
batterie:
(i)
S
tay
clear
of
fan
blades,
belts,
pulleys,
and
other
parts
that
can
cause
injury
to
persons;
(i)
Faire
attention
aux
pales,
aux
courroies
et
aux
pou-
lies
du
ventilateur
ainsi
qu’a
toute
autre
piece
suscepti¬
ble
de
causer
des
blessures;
(ii)
Check
polarity
of
battery
posts.
Positive
(Pos,
P,
+)
battery
post
usually
has
larger
diameter
than
negative
(Neg,
N,
—)
post;
(ii)
Verifier
la
polarite
des
bornes
de
la
batterie.
Le
dia-
metre
de
la
borne
positive
(Pos,
P,
+)
est
generalement
superieur
a
celui
de
la
borne
negative
(Neg,
N,
-);
(iii)
Determine
which
post
of
battery
is
grounded
(con¬
nected)
to
the
chassis.
If
negative
post
is
grounded
to
chassis
(as
in
most
vehicles),
see
item
(iv).
If
positive
post
is
grounded
to
the
chassis,
see
item
(v);
(iii)
Determiner
quelle
borne
est
mise
a
la
masse
(rac¬
cordee
au
chassis).
Si
la
borne
negative
est
raccordee
au
chassis
(comme
dans
la
plupart
des
cas),
voir
le
point
(iv)
.
Si
la
borne
positive
est
raccordee
au
chassis,
voir
le
point
(v);
(iv)
F
or
negative-grounded
generator
set,
connect
posi¬
tive
(red)
clip
from
battery
charger
to
positive
(Pos,
P,
+
)
ungrounded
post
of
battery.
Connect
negative
(black)
clip
to
engine
block
away
from
battery.
Do
not
connect
clip
to
carburetor,
fuel
lines,
or
sheet-metal
body
parts.
Connect
to
a
heavy
gauge
metal
part
of
the
engine
block;
(iv)
Si
la
borne
negative
du
generateur
est
mise
a
la
masse,
raccorder
ia
pince
positive
(rouge)
du
chargeur
a
la
borne
positive
(Pos,
P,
+)
non
mise
a
la
masse
de
la
batterie.
Raccorder
la
pince
negative
(noire)
au
bloc
moteur,
loin
de
la
batterie.
Ne
pas
raccorder
la
pince
au
carburateur,
aux
canalisations
d’essence
ni
aux
pieces
de
carrosserie
en
tole.
Raccorder
a
une
piece
metal-
lique
de
forte
epaisseur,
sur
le
bloc
moteur;
(v)
For
positive-grounded
generator
set,
connect
nega¬
tive
(black)
clip
from
battery
charger
to
negative
(Neg,
N,
-)
ungrounded
post
of
battery.
Connect
positive
(red)
clip
to
engine
block
away
from
battery.
Do
not
connect
clip
to
carburetor,
fuel
lines,
or
sheet-metal
body
parts.
Connect
to
a
heavy
gauge
metal
part
of
the
engine
block;
(v)
Si
la
borne
positive
du
generateur
est
mise
a
la
mas¬
se,
raccorder
la
pince
negative
(noire)
du
chargeur
a
la
borne
negative
(Neg,
N,
-)
non
mise
a
la
masse
de
la
batterie.
Raccorder
la
pince
positive
(rouge)
au
bloc
mo¬
teur,
loin
de
la
batterie.
Ne
pas
raccorder
la
pince
au
car¬
burateur,
aux
canalisations
d’essence
ni
aux
pieces
de
carrosserie
en
tole.
Raccorder
a
une
piece
metallique
de
forte
epaisseur,
sur
le
bloc
moteur;
(vi)
Connect
charger
AC
supply
cord
to
electric
outlet;
(vi)
Brancher
le
cordon
d’alimentation
c.a.
du
chargeur
a
une
prise
electrique;
(vii)
When
disconnecting
charger,
turn
switches
to
off,
disconnect
AC
cord,
remove
clip
from
engine
block,
and
then
remove
clip
from
battery
terminal;
(vii)
P
our
interrompre
I'alimentation
du
chargeur,
mettre
les
interrupteurs
hors
circuit,
retirer
le
cordon
c.a.
de
la
prise,
enlever
la
pince
raccordee
au
bloc
moteur
et
en
dernier
lieu
celle
raccordee
a
la
batterie.
(n)
F
ollow
these
steps
when
battery
is
outside
generator
set.
A
spark
near
battery
can
cause
battery
explosion.
To
reduce
risk
of
a
spark
near
battery:
(n)
Suivre
les
etapes
suivantes
lorsque
la
batterie
est
a
I’exterieur
du
generateur.
Une
etincelle
pres
de
la
batte¬
rie
peut
provoquer
I’explosion
de
cette
derniere.
Pour
re¬
duire
le
risque
d’etincelle
a
proximite
de
la
batterie:
(i)
Check
polarity
of
battery
posts.
Positive
(Pcs,
P,
+)
battery
post
usually
has
a
larger
diameter
than
neqative
(Neg,
N,-)
post;
(i)
Verifier
la
polarite
des
bornes
de
la
batterie.
Le
dia-
metre
de
la
borne
positive
(Pos,
P,
+)
est
generalement
superieur
a
celui
de
la
borne
negative
(Neg,
N,
-);
(ii)
A
ttach
at
least
a
24-inch
(610
mm)
long,
6-gauge
(AWG)
insulated
battery
cable
to
negative
(Neg,
N,
-)
battery
post;
(ii)
Raccorder
un
cable
de
batterie
isole
N°6
AWG
me-
surant
au
moins
24
pouces
(610
mm)
de
longueur
a
la
borne
negative
(Neg,
N,
-)
de
la
batterie;
(iii)
Connect
positive
(red)
charger
clip
to
positive
(Pos,
P,
+)
post
of
battery;
(iii)
Raccorder
la
pince
positive
(rouge)
a
la
borne
posi¬
tive
(Pos,
P,
+)
de
la
batterie;
(iv)
Position
yourself
and
free
end
of
cable
as
far
away
from
battery
as
possible,
then
connect
negative
(black)
charger
clip
to
free
end
of
cable;
(iv)
S
e
placer
et
tenir
I’extremite
libre
du
cable
aussi
loin
que
possible
de
la
batterie
puis
raccorder
la
pince
nega¬
tive
(noire)
du
chargeur
a
I’extremite
libre
du
cable;
(v)
D
o
not
face
battery
when
making
final
connection;
(v)
Ne
pas
se
placer
face
a
la
batterie
pour
effectuer
le
dernier
raccordement;
(vi)
Connect
charger
AC
supply
cord
to
electric
outlet;
(vi)
Raccorder
le
cordon
d’alimentation
c.a.
du
chargeur
r
a
la
prise
electrique;
(vii)
When
disconnecting
charger,
always
do
so
in
re¬
verse
sequence
of
connecting
procedure
and
break
first
connection
while
as
far
away
from
battery
as
practical.
(vii)
P
our
interrompre
I’alimentation
du
chargeur,
tou-
jours
proceder
dans
I’ordre
inverse
de
la
procedure
de
branchement
et
defaire
la
premiere
connexion
en
se
te¬
nant
aussi
loin
que
possible
de
la
batterie.
3
IV
FEATURES
The
Onan
SCR
battery
float
charger
is
a
fully
automatic,
constant
voltage
current
limiting
charger
with
a
built-in
equalize
charge
timer.
When
the
charger
is
used
for
stationary
service,
the
permanently
connected
battery
floats
at
a
constant
voltage.
As
the
battery
approaches
the
pre-set
full
charge
voltage,
charging
current
auto¬
matically
tapers
to
zero.
This
feature
keeps
batteries
fully
charged
with
no
gassing
and
no
overcharging.
For
faster
charging
in
portable
service
or
to
equalize
charge
the
floating
battery,
a
higher
charging
voltage
can
be
obtained
by
switching
on
the
equalize
charge
timer.
Turning
the
timer
raises
the
charger
output
volt¬
age
for
the
selected
time
interval
(0
to
12
hours).
At
the
end
of
the
charging
period,
the
timer
automatically
switches
back
to
the
float
voltage.
LINE
CONNECTION
USE:
NO.
16AWG
BATTERY
CONNECTION
USE.
NO.
16
AWG
OR
LARGER
FIGURE
1.
BATTERY
CHARGER
TERMINAL
BLOCK
FOR
LINE
AND
BATTERY
CONNECTIONS
Another
feature
includes
special
circuitry
to
protect
the
charger
from
possible
damages
due
to
shorted
output
leads,
reversed
battery
connections,
and
overload
cur¬
rents.
The
SCR
battery
charger
may
be
used
for
both
lead-acid
and
nickel-cadmium
batteries.
INSTALLATION
The
metal
charger
cabinet
can
be
mounted
on
the
wall
using
the
four
mounting
brackets
(one
on
each
corner
of
the
cabinet)
or
set
on
a
bench
using
the
four
rubber
feet
Install
the
battery
charger
in
a
location
where
it
is
pro¬
tected
from
moisture,
dust,
dirt,
or
high
ambient
temper¬
ature
conditions
(140°F/60°C
and
above).
Use
16
AWG
wire
for
the
line
connections
and
16
AWG
or
larger
for
the
battery
connections.
Route
the
lead
wires
through
the
knockout
hole
in
the
bottom
of
the
chassis.
4.
The
battery
charger
is
wired
at
the
factory
for
120
volt
AC
(input)
operation.
To
operate
at
208
or
240
volts
AC
(input),
change
the
lead
wire
connections
to
the
power
transformer
(T1)
as
shown
in
Figure
2.
The
exception
is
480
volt
chargers
that
have
single
voltage
input
suitable
for
inputs
in
the
range
of
440
to
480
volts
AC.
Wiring
1.
Remove
the
ground
cable
of
any
battery
that
will
connect
to
the
battery
charger.
2.
Remove
the
AC
power
source
to
which
the
battery
charger
will
connect
High
AC
voltages
present
an
electrical
shock
hazard
that
can
cause
severe
personal
injury
or
death.
Be
sure
to
remove
AC
power
during
the
installation
pro¬
cedures.
A
WARNING
]
TRANSFORMER
3.
I
nstall
lead
wires
(not
included
with
charger)
for
the
AC
line
voltage
connections
and
charger
to
battery
connections.
Connect
lead
wires
to
the
terminal
figure
2
.
battery
charger
power
transformers
board
on
the
inside
backplate
as
shown
in
Figure
1.
Also
connect
a
ground
wire
to
the
grounding
stud
at
the
bottom
of
the
charger
cabinet
1
SPECIFICATIONS
OPERATION
The
battery
charger
can
be
operated
as
a
stationary
or
portable
unit
for
charging
either
lead-acid
or
nickel-cadmium
batteries.
The
electronic
voltage
sensor
checks
the
battery
voltage
after
every
half
cycle.
If
the
battery
voltage
is
below
the
reference
voltage
level,
the
sensor
turns
on
the
silicon
con¬
trolled
rectifier
to
supply
charging
current
from
the
full
wave
bridge
rectifier.
The
charge
rate
tapers
to
zero
current
as
the
battery
becomes
fully
charged.
The
charger
may
be
connected
on
a
continuous
basis
to
maintain
the
battery
in
a
fully
charged
condition.
Discharged
battery
must
provide
a
minimum
of
4
volts
to
allow
charger
to
operate
property.
Modes
of
Operation
The
charger
has
two
modes
of
operation:
(1)
equal¬
ize
charge,
and
(2)
float
charge.
The
manually
set
equalize
charge
timer
(Figure
3)
raises
the
charger
output
voltage
for
a
selected
time
period
up
to
12
hours.
The
charger
returns
to
float
charge
at
the
end
of
the
selected
time
period.
VOLTMETER
AMMETER
FIGURE
3.
BATTERY
CHARGER
FRONT
PANEL
COMPONENTS
DC
VOLTAGE
OUTPUT
12
VOLT
24
VOLT
MODEL
120-208-240VAC
305-0347/-0707
305-0346/-0706
NO.
440-480
VAC
305-0395/0709
305-0398/0708
Available
Input
VAC
120-480
120-480
Output
Amp,
DC
10
6
Regulation
±2%
±2%
DC
Voltmeter
0-20
0-40
DC
Ammeter
0-10
0-10
Timer
(hrs.)
0-12
0-12
Dimensions
(in.)
10x8x8
10
x
8
x
8
Weight
(lbs)
23
27
*
-
Within
±10%
line
voltage
and
±3
Hz
of
nominal
frequency.
Charging
Batteries
Plug
in
the
charger
to
the
AC
line
voltage
source
(120
through
480
as
required).
Connect
battery
lead
wires
to
battery
terminals,
positive
(+)
and
negative
(-)
to
negative,
and
turn
on
charger.
The
factory
adjusts
the
charger
float
and
equalize
voltages
to
the
values
shown
in
Table
1.
Refer
to
the
ADJUST¬
MENTS
section
if
any
adjustments
to
the
charging
voltages
are
necessary.
Any
number
of
batteries
may
be
connected
to
the
charger.
For
faster
charging,
connect
two
battery
chargers
together
in
parallel.
The
charger
with
the
highest
pre-set
voltage
will
control
the
voltage
of
the
battery.
Turn
on
equalize
charge
timer
to
rapidly
charge
batteries
or
to
equalize
the
battery.
Most
lead-acid
battery
manufacturers
recommend
24
hours
of
equalize
charging
each
month.
Use
the
equalize
charge
timer
to
periodically
equalize
float
charged
lead-acid
batteries.
Nickel-cadmium
batteries
do
not
require
equalize
charging.
Controls
ON-OFF
Switch:
De-energizes
both
the
AC
and
DC
circuits
of
the
charger.
Equalize
Charge
Timer:
Use
to
rapidly
charge
bat¬
teries
or
to
equalize
charge
the
battery.
Timer
can
be
set
for
up
to
12
hours.
DC
Ammeter:
Indicates
the
charger
output
current
DC
Voltmeter
Indicates
the
terminal
voltage
of
the
battery.
Fuse:
Replaceable
tubular
type
fuse
protects
the
transformer
and
rectifier
circuits
from
excessive
overloads
(15
amperes
for
12
volt
10
amperes
for
24
volts).
TABLE
1.
FLOAT/EQUALIZE
VOLTAGES
Lead-Acid
Batteries
Battery
Voltage
•Float
Voltage
Equalize
Voltage
12
13.3
14.4
24
26.6
28.8
Nickel-Cadmium
Batteries
Float
Voltage
Charge
Per
Cell
1.38
to
1.45
Example:
Float
charge
for
10
cell
battery
should
be
13.8
to
14.5
volts.
•Voltages
shown
are
for
ambient
temperatures
of
50°F
(10°C)
to
85°
F
(30°
C).
Reduce
float
voltage
by
1%
for
every
9°F
(5°C)
above
85°
F
(29°C).
Increase
float
voltage
by
1%
for
every
9°F
(5°C)
below
50°
F
(10°C).
2
ADJUSTMENTS
Adjust
the
float
and
equalize
voltages
according
to
the
following:
1.
Connect
charger
to
a
fully
charged
battery.
2.
Connect
a
high
accuracy
voltmeter
(preferably
1%
or
better)
to
the
battery
terminals.
3.
Turn
on
equalize
charge
timer
and
charge
battery
until
it
gases.
4.
Return
timer
to
zero
and
wait
until
voltage
stabilizes.
5.
If
necessary,
adjust
the
float
adjustment
as
follows:
A.
R
emove
AC
power
to
the
battery
charger.
AWARNING
High
AC
voltages
present
an
electrical
shock
hazard
that
can
cause
severe
personal
injury
or
death.
Make
sure
to
remove
AC
power
input
to
the
battery
charger
before
performing
adjustment
or
service
procedures.
B.
Open
battery
charger
cover
to
expose
the
bat¬
tery
charger
interior.
C.
Turn
the
float
adjustment
potentiometer
(Figure
4)
counterclockwise
to
increase
float
voltage
and
clockwise
to
decrease
float
voltage.
Refer
to
Table
1
for
the
recommended
set
voltage.
D.
Close
the
battery
charger
and
reconnect
the
AC
power.
E.
Wait
for
the
voltage
to
stabilize
before
making
any
additional
adjustments.
Then
make
adjust¬
ments
repeating
steps
5a
through
5d.
REGULATOR
TERMINAL
BOARD
TURN
COUNTERCLOCKWISE
TO
INCREASE
FLOAT
VOLTAGE.
CLOCKWISE
TO
DECREASE.
TURN
COUNTERCLOCKWISE
TO
INCREASE
EQUALIZE
VOLTAGE.
CLOCKWISE
TO
DECREASE.
6.
After
the
float
adjustment
is
complete,
set
timer
to
equalize
charge
and
wait
until
charge
current
drops
below
5
amperes.
7.
If
voltage
is
above
the
desired
equalize
voltage
(see
Table
1),
perform
the
following:
A.
R
emove
AC
power
to
the
battery
charger.
AWARNING
High
AC
voltages
present
an
electrical
shock
hazard
that
can
cause
severe
personal
injury
or
death.
Make
sure
to
remove
AC
power
input
to
the
battery
charger
before
making
any
adjust¬
ments.
B.
Open
battery
charger
cover
to
expose
the
bat¬
tery
charger
interior.
C.
Turn
the
equalize-adjust
potentiometer
clock¬
wise
(turn
in
small
amounts,
see
Figure
4)
to
decrease
the
voltage.
D.
Close
the
battery
charger
and
reconnect
the
AC
power.
E.
Wait
until
battery
voltage
drops
and
levels
off
before
making
further
adjustments.
If
further
adjustments
are
necessary,
repeat
steps
7a
through
7d.
8.
I
f
voltage
is
below
the
desired
equalize
voltage
(see
Table
1),
perform
the
following:
A.
Remove
AC
power
to
the
battery
charger.
A
WARNING!
High
AC
volta
9
es
present
an
--
_L
VLj
electrical
shock
hazard
that
can
cause
severe
personal
injury
or
death.
Make
sure
to
remove
AC
power
before
per¬
forming
adjustment
or
service
procedures.
FIGURE
4.
FLOAT
AND
EQUALIZE
CHARGE
ADJUSTMENTS
3
B.
Open
battery
charger
cover
to
expose
the
bat¬
tery
charger
interior.
C.
Turn
the
equalize-adjust
potentiometer
(Figure
4)
counterclockwise
(turn
in
small
amounts)
to
increase
voltage.
This
will
also
cause
the
charge
current
(amperes)
to
increase.
D.
Close
the
battery
charger
and
reconnect
the
AC
power.
E.
Wait
for
the
charge
current
to
drop
and
battery
voltage
to
level
off
before
making
further
adjustments.
Then
make
adjustments
repeating
steps
8a
through
8d.
9.
Disconnect
the
high
accuracy
voltmeter
and
return
timer
to
zero
for
float
charging.
TROUBLESHOOTING
POSSIBLE
CAUSE
REMEDY
NO
DC
OUTPUT
Blown
Fuse
(FI).
Replace.
Defective
Switch
(SW1).*
Replace.
Defective
Transformer
(T2).*
Secondary
output
voltage
at
full
load
should
be
13
±
1.5
volts
(12
volt
unit),
26
±
3
volts
(24
volt
unit),
43.5
volts
d
volt
unit).
Defective
Rectifier
(CR1).*
Use
ohmmeter
to
check
each
rectifier
element
(4).
Re¬
sistance
must
be
high
in
one
direction,
low
in
the
other
direction.
Check
between
ad¬
jacent
terminals.
Defective
Control
Rectifier
(SCR).*
Check
by
replacement.
EQUALIZE
CHARGE
RATE
ONLY
Defective
timer.*
Check
that
timer
contacts
close
when
timer
is
not
operating.
FLOAT
CHARGE
RATE
ONLY
Defective
timer.*
Check
that
timer
contacts
close
when
timer
is
operating.
Defective
Regulator
Assy.*
Check
by
replacement.
*
-
Have
components
checked
by
qualified
electronic
service
personnel.
4
Onon
Onan
Corporation
1400
73rd
Avenue
N.
E.
Minneapolis,
MN
55432
612-574-5000
Telex:
275477
Fax:612-574-8087
Onan
is
a
registered
trademark
of
Onan
Corporation
This manual suits for next models
7
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