D
uo C
har
ge
W
iring D
iagr
am
The
follo
wing
diag
ram
illustr
at
es
a
typical
D
uo
Char
ge
installa
tion.
Please
not
e
tha
t the
use
of
a
separ
at
e
solenoid
and
manual
bypass
is
only
requir
ed
in
installa
tions
wher
e
the
30-amp
limita
tion
of
the
D
uo
Char
ge
’s
in
ter
nal
cir
cuitr
y
is
unable
to
suppor
t star
ting
ba
tt
er
y
loads
.
The
optional
Ba
tt
er
y
Temper
atur
e
Sensor
cable
allo
w
s the
D
uo
Char
ge
to
monit
or
for
unsaf
e
temper
atur
es
at
the
star
ting
ba
tt
er
y,
as
is
rec
om
-
mended as an additional measur
e of saf
et
y.
7
Duo Charge Troubleshooting
Symptom
Cause/Solution
No Lights/No Output
No voltage at input wire or ON/OFF wire – Check wiring and repair.
1.
Bad fusing on input wire – Replace 30A fuse in input cable.
2.
Voltage too low at house battery bank – Check house battery charging system.
3.
Starting battery demanding >30A – Install solenoid and manual over-ride switch. Check grounding.
4.
Bad Duo Charge unit – Contact Balmar Customer Service at 360-435-6100 or at [email protected].
5.
Interference at radio,
autopilot or navigation
equipment when Duo
Charge is active
Input, Output or ON/OFF wires causing interference – Re-route wiring. Check system grounding.
1.
Output wire is coiled – Uncoil any surplus wire and re-arrange to ensure noise is reduced.
2.
Duo Charge is mounted too close to electronics – Relocate Duo Charge.
3.
Frequency interference – Install noise reduction filter on electronics power wire.
4.
Output voltage is not ap-
propriate for battery type
selected
Wrong battery program selected – Verify program and re-program as described above.
1.
Voltage drop in output cable – Check wiring resistance and repair as needed.
2.
Voltage drop in input cable – Check wiring resistance and repair as needed.
3.
Voltage drop in output cable – Check wiring resistance and repair as needed.
4.
No Output. #4 LED blinks
once intermittent
High system temperature – Determine source of overheating and repair.
1.
No Output. #4 LED blinks
twice intermittent
Start battery voltage too high – Inspect starting battery for secondary charge sources and correct.
1.
No Output. #4 LED blinks
three times intermittent
House battery voltage too low – Correct charging source for house battery bank.
1.
House battery voltage too low – Check wiring resistance in Input wire and repair as needed.
2.
No Output. #4 LED blinks
four times intermittent
House battery voltage too high – Correct charging source for house battery bank.
1.
No Output. #4 LED blinks
five times intermittent
Start battery temperature too high – Shut down system. CAREFULLY inspect starting battery for signs of
1.
overheating. Repair condition and/or replace starting battery.
Bad Temperature Sensor cable – Check wiring resistance (approx. 34-40k). Repair or replace Temperature
2.
Sensor cable.
Bad system grounding – Test ground-side resistance between batteries and charging system. Repair.
3.
No Output. #4 LED blinks
six times intermittent
Voltage too low at ON/OFF terminal – Repair or relocate ON/OFF wire.
1.
Balmar warrants the Digital Duo Charge for one year against defects in material or worksmanship. The complete Balmar limited product
warranty statement is available at www.balmar.net. Please contact our Customer Service department at 360-435-6100 prior to return for
warranty evaluation. Balmar is not responsible for product returned without prior authorization. See website for detailed warranty info.
