Beta Marine Beta 10 Operator's Maintenance Manual page 39

Electrical Fault Finding - C Deluxe and Water Temperature Function on B Panels
In addition to the fault finding detailed on the previous table, the following is specific for the deluxe panel (Also applicable for
the B panel with Murphy water temperature gauge)
Problem
Oil pressure warning lamp 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 lamp functioning correctly
Oil pressure showing no movement,
Warning lamp not functioning correctly
Oil pressure showing normal operating pressure
(0.75 - 5 bar). Buzzer sounding and lamp illuminated.
Water temperature gauge showing 120°C / 250°F.
This also applies to the B Panel with Murphy gauge
Water temperature gauge showing normal operating
temperature (85°C). Buzzer sounding and lamp illuminated.
This also applies to the B Panel with Murphy gauge
Water temperature gauge showing no movement,
lamp not illuminated, engine warm.
This also applies to the B Panel with Murphy gauge
Water temperature gauge showing no movement,
lamp not illuminated, engine warm.
This also applies to the B Panel with Murphy gauge
Possible Cause and Solution
• Faulty wiring - check wire connection and continuity
(small white/brown) from sender to panel lamp.
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 (ground)
approx. 50 Ω . Replace if no reading or short-circuited.
• If adjusted correctly & buzzer still sounding, possible
faulty switch gauge unit - replace.
Engine warm:
• Incorrectly calibrated switching point for warning lamp,
adjust on rear of gauge to 0.5 bar (minimum
adjustment on gauge).
• If adjusted correctly & buzzer still sounding, faulty
switch gauge unit - replace.
Engine cold / cool:
• Faulty wiring, check water temperature sender wire is
not shorting to earth (ground).
• Faulty sender unit, - check resistance to earth (ground),
approx. 3.5k Ω (cold) – 0.5k Ω (warm).
Replace if notably less.
Engine warm:
• Incorrectly calibrated switching point for warning lamp
adjust on rear of gauge to 100°C / 210°F.
• If adjusted correctly & buzzer still sounding, faulty
switch gauge unit – replace.
• Check connection to sender, if disconnected gauge
will not function.
• Check connection to temperature gauge, if plug is not
connected to socket on rear of gauge reconnect.
• Check connection to sender, if disconnected gauge
will not function.
• Check connection to temperature gauge, if plug is not
connected to socket on rear of gauge reconnect. If all
connections are correctly made, faulty sender unit -
check resistance to earth (ground), approx.
3.5k Ω (cold) – 0.5k Ω (warm). Replace if no reading.
37