Yanmar 4LHA-HTP Operation Manual page 59

6. TROUBLESHOOTING
Trouble
lAlarm buzzer
sounds and alarm
lamps go on
during operation
OEng. L O . Press.
Warning Lamp
goes on.
OMarinegear lube oil
level light goes on.
OC.W. Temp.(Fresh
Water) Warning
Lamp goes on.
OFuel Filter drain
Lamp goes on
(4LHA-HTP/-HTZP)
^Warning Devices
are Faulty.
When Switch is
Turned ON:
OAlarm buzzer
does not sound
OWarning lamps
do not go on
Eng. L.O. Press.
OCharge lamp does
not go on.
When the Key Returned
to ON from START after
Engine Starting:
OBuzzer keeps on
sounding
OOne of the warning
f
lamps does not go out.
Probable Cause
^[NOTICE]
Shift to low speed operation immediately, check which lamp has
come on and stop the engine for inspection.
If no abnormality is identified and there is no problem with
operation, return to port at your lowest speed and request repairs.
Engine L.O. insufficient;
L.O. filter clogged.
Insufficient marine gear
lube oil
Fresh water tank
water level low.
Cooling seawater
discharge insufficient
Contamination inside
the cooling system.
Drain excessive in the
W/O separator
MNOTICE]
Do not run the engine with alarm devices still unrepaired.
Trouble will progress and a serious problems may result.
Circuit broken or
buzzer defective.
(Note) Other warning lamps do not go on when the switch is
turn on. They only go on when there is an abnormality.
Circuit broken or lamp
burnt out.
Short-circuit (if lamp
goes out)
Sensor switches faulty
- 5 5 -
Measure
L.O. level check,
resupply, replace
Replace L O . filter
Replace Eng. L.O.
Check the oil level
and supply.
Check C.W. level
resupply
System clogged; air.
has entered the system
Ask for repairs.
Drain the water in the
W/O separator of the
fuel filter
Ask for repairs.
Ask for repairs.
Ask for repairs.
Ask for repairs.
Reference
—
3.3
5.2.1(1)
5.2.1(1)
3.4
3.5
5.2.2(3)
2.5