Beta Marine Beta 50 Operator's Maintenance Manual page 49

Problem
Buzzer not functioning. The buzzer will not sound for
green 'power on' light
Starter battery charge light not functioning
If tacho not functioning
Domestic charge light not functioning, buzzer remains
on with engine running
Possible Cause and Solution
• If light is functioning but buzzer not sounding, check
connection and continuity from illuminated warning
light (red not green) to buzzer board.
• Faulty warning panel buzzer board - replace.
If tacho not functioning:
• Alternator not connected properly, check continuity of
small brown wire from rear of alternator to AC position
on keyswitch.
• Alternator connected properly, faulty alternator - replace.
If tacho functioning correctly:
• Check continuity of small brown/yellow wire from rear
of alternator to no charge warning light on rear of panel.
• If alternator connected properly, faulty panel warning
light - replace.
• Check connections on rear of tacho, especially black/
blue wire, terminal '4'.
• Check connection of black/blue wire on rear of 1st
alternator (W connection, usually a bullet on flying lead,
or lowest connection on alternators with 3 pin coupler).
• Check continuity of black/blue wire from alternator
to tacho.
• Measure voltage from alternator W connection to earth
(ground), should be approx. 7.5 - 9.0 volts AC.
• Domestic battery not connected.
• Domestic battery not connected correctly:
B+ to domestic isolation block on starboard rail
(port on 75 - 115T)
B- to engine earth (ground).
• Domestic battery flat.
• Panel relay faulty/incorrectly wired: Check voltage at
relay terminal 86, white wire is positive feed for
warning light from AC position of keyswitch.
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