Beta Marine Beta 10 Operator's Maintenance Manual page 36

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.
Note: our standard control panels are for earth return
installations only (where battery negative cable is connected
directly to engine ground). For insulated earth (where battery
negative cable is isolated from engine ground) different
harnesses, alternators, switches for oil pressure and engine
temperature are fitted.
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 and 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
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.
Battery positive
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Battery negative
Standard Keyswitch Control Panels are
supplied with four or five lamps.
Four lamp panels: A, ABV, B these panels utilise bulbs
inside sealed lamp holders.
Five lamp panels: AB and C; these panels also utilise
bulbs inside sealed lamp holders, having an additional
lamp for 'domestic battery charge'.
HEAT
With keyswitch* in run position and engine off:
Red lamp for 'low oil pressure' should function
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 '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)
Green lamp for 'panel power on'
should function
Buzzer should sound
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OFF
RUN
START
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