Beta Marine BV1305 Operation And Maintenance Manual page 22

ELECTRICAL FAULT FINDING & TROUBLE SHOOTING –
ENGINES BUILT AFTER JULY 2005 ONLY
The following chart is compiled to aid
diagnosis of electrical faults, based on
the Beta 10-90hp range of engines. If
your engine was built before July
2005, contact Beta Marine for the
relevant electrical trouble shooting
guide.
Standard sea specification engines
(heat exchanger cooled) are supplied
with a single alternator, mounted port
side, supplying power to starter battery
and control panel.
Standard canal specification engines
(keel cooled) are supplied with twin
alternators:
• 1st alternator, mounted port side,
supplying power to starter battery
and control panel
• 2nd alternator, the standard
mounting position for this is above
the engine on the starboard side
(or below 1st alternator on 75 &
90hp), supplying power to the
domestic battery system.
Both of these alternators work
independently, if the domestic battery
system is disconnected, the engine
will still run correctly but:
• Domestic charge warning lamp
will not function
• Warning buzzer will remain on at
all times
Standard control panels are supplied
with four or five lamps:
Four lamp panels:
A, ABV, ABVW, B, these panels utilise
bulbs inside sealed lamp holders
Five lamp panels:
AB or Deluxe C, these panels also
utilise bulbs inside sealed lamp
holders, having an additional lamp for
domestic battery charge
With keyswitch* in run position &
engine off:
• Red lamp for no starter battery
charge should function
• Red lamp for no domestic battery
charge should function (Note: this
will only function if a second
alternator is fitted to the engine
and connected to a charged
battery)
All Beta panels have the following warning lamps:
Starter battery charge warning lamp
• High engine temperature warning lamp
• Low engine oil pressure warning lamp
All panels also have:
• Panel power on (this is not a warning lamp)
In addition to above the domestic AB, C Deluxe panels also have a:
• Domestic battery charge warning lamp
• Red lamp for high engine
temperature should not function
(when engine is cold / cool /
warm). This lamp will only ever
function if the engine is over
temperature.
• Red lamp for low oil pressure
should function
• Green lamp for panel power on
should function
• Buzzer should sound
* For operation of engines controlled
with keyless panels refer to 'correct
operation of keyless panels' later in
this section
When the engine is started, all the red
warning lamps should switch off
leaving just the green power on
indication lamp illuminated. The oil
pressure lamp may take a few
seconds to switch off and the charge
fail lamp may remain on until engine
rpm is increased to approximately
1,000rpm (if the engine was started
at tickover).
Before investigating any specific
electrical problem, always check:
• Connection between panel
harness and panel loom. It must
be clean, dry and secured with a
cable tie.
• Check the start battery is
connected to the correct terminal
on the starter motor.
• Check the domestic battery is
(A, AB, ABV, ABVW,
B and C Deluxe)
switched on and connected to the
correct terminals for the 2nd
alternator.
• Battery connections, inspecting
condition of cables from battery to
engine. If in doubt measure the
voltage at the engine.
• If alternator charge problem,
measure battery voltage with
engine off and again with engine
running, if there is an increase
alternator is functioning correctly, if
not refer to check list.
Note: The two way plug on panel
loom will only have a corresponding
socket to connect into from the engine
if a 2nd alternator is fitted which
requires this connection. Engines with
only one alternator do not utilise this
connection.
Typical start battery positive
Typical start battery negative
Red
Red
Red
Green
Red