Yanmar 4LHA-HTP User Manual

6. TROUBLESHOOTING
Trouble
Probable Cause
Measure
Reference
lAlarm buzzer
sounds and alarm
lamps go on
during operation
OEng. LO. Press.
Warning Lamp
goes on.
OMarinegear lube oil
level light goes on.
OC.W. Temp.(Fresh
Water) Warning
Lamp goes on.
^[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.
OFuel Filter drain
Lamp goes on
(4LHA-HTP/-HTZP)
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
L.O. level check,
resupply, replace
Replace LO. 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
3.3
5.2.1(1)
5.2.1(1)
3.4
3.5
5.2.2(3)
f
^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
lamps does not go out.
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.
Ask for repairs.
2.5
(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
Ask for repairs.
Ask for repairs.
Ask for repairs.
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Yanmar 4LHA-HTP Specifications

General

Brand	Yanmar
Model	4LHA-HTP
Category	Engine
Language	English