Fault Possible cause Remedy
Lack of coolant Check all pipes and hoses for good con-
dition and leak tightness
Check the coolant level, top up if neces-
sary
Do not use radiator sealant to seal leaks
Anti-freeze concentration too high Use coolant with the specified mixing
ratio
Air filter dirty Clean, replace if necessary
Thermostat defective Check the thermostat, replace if neces-
sary
Interior parts of radiator corroded Clean or replace the radiator
Insufficient cooling air supply to the
cooling fan
Remove any clogging from the cooling air
duct
Fan, radiator or radiator cap defective Have examined by a specialist
Engine has insuffi-
cient engine oil
pressure (engine oil
pressure warning
lamp lights)
Engine oil level too low Check, fill up if necessary
Lubrication system leaking Have the lubrication system examined by
a specialist
The charge control
light lights during
operation, the
warning buzzer
sounds
Generator speed too low Check the generator belt for tension,
replace the belt if necessary
Generator or regulator defective Have examined by a specialist
Troubleshooting – Engine faults
D.ONE
158
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