TROUBLESHOOTING
80
L-N Operation Manual
Indicator Stays On - Key Switch is Turned from Start to ON (START → ON)
• Battery indicator stays On • Faulty alternator • See authorized Yanmar
industrial engine dealer or
distributor
—
• Engine oil pressure indicator
stays On
• Faulty engine oil pressure
switch
—
Engine Does Not Start
• Starter motor operates but
engine does not start
• No diesel fuel • Refuel fuel system Filling the Fuel
Tank on page 25
• Improper diesel fuel • Replace with recommended
diesel fuel
Diesel Fuel
Specifications on
page 24
• Clogged fuel filter • Replace fuel filter Drain the Fuel Tank
and Replace Outlet
Fuel Filter on page 73
• Poor fuel injection • See authorized Yanmar
industrial engine dealer or
distributor
—
• Compressed air leakage from
intake / exhaust valves
—
• Faulty engine stop solenoid (if
equipped)
—
• Starter motor does not
operate or rotates too slowly
(engine can be turned
manually)
• Battery needs charging • Check electrolyte, recharge Check Battery (If
Equipped) on page 61
• Faulty cable connection at
• battery terminals
• Clean terminals, retighten —
• Faulty starter switch • See authorized Yanmar
industrial engine dealer or
distributor
—
• Faulty starter motor —
• Engine cannot be manually
turned
• Inner parts seized or damaged —
White or Black Exhaust Smoke
• Black exhaust smoke • Engine overloaded • Reduce load —
• Clogged air cleaner element • Clean element or replace Clean Air Cleaner
Element on page 71
• Improper diesel fuel • Replace with recommended
diesel fuel
Diesel Fuel
Specifications on
page 24
• Faulty spraying of fuel
injection
• See authorized Yanmar
industrial engine dealer or
distributor
—
• Excessive intake / exhaust
valve clearance
—
SYMPTOM PROBABLE CAUSE ACTION REFER TO
LN Series OperationManual_A4.book 80 ページ ２００６年５月１２日 金曜日 午前１０時１８分
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