Beta Marine Beta 50 Operator's Maintenance Manual page 50

Problem
Domestic charge light not functioning, buzzer remains
on with engine running
Domestic charge light not functioning, buzzer switching
off with engine running. This light will only function
if a second alternator is fitted to the engine
ELECTRICAL TROUBLE SHOOTING - B, BW, C AND CW CONTROL PANELS
In addition to the fault finding detailed on the previous pages, the following is specific for control panels as listed above.
Problem
Oil pressure warning light not functioning, oil pressure
gauge showing maximum deflection. Engine off and
keyswitch in run position
Oil pressure gauge showing no movement - even when
engine is started. Warning light functioning correctly
oil pressure showing no movement, warning light not
functioning correctly
Possible Cause and Solution
• Domestic battery not connected.
• Domestic battery not connected correctly:
B+ to domestic isolation block on starboard rail
(port on 75 - 115T) and 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.
• No second alternator fitted to engine, domestic light
not used.
• D+ (charge indication) light connection at rear of
alternator not connected.
• Two way plug and socket disconnected between
engine harness and panel loom.
Possible Cause and Solution
• Faulty wiring - check wire connection and continuity
(small white/brown) from sender to panel light.
• Ensure this connection is not shorting to earth (ground).
• Faulty wiring - check oil pressure sender wire (small
white/brown) is connected.
• Check connection to oil pressure gauge, if plug is not
connected to socket on rear of gauge, reconnect.
• If all connections are correctly made, possible faulty
sender unit - check resistance to earth, approx. 50 Ω.
Replace if no reading or short-circuited.
• If adjusted correctly and buzzer still sounding, possible
faulty switch gauge unit - replace.
48