47
Problem
Possible Cause and Solution
Buzzer not functioning.
The buzzer will not sound for
• If light is functioning but buzzer not sounding, check
green ’power on’ light
connection and
continuity from illuminated warning
light (red not green) to buzzer board.
• Faulty warning panel buzzer board -
replace.
Starter battery charge light not functioning
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.
If tacho not functioning
• 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 charge light not functioning, buzzer remains
• Domestic battery not connected.
on with engine running
• 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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