5 Failure cause and measures
5.2 Troubleshooting
• Should any trouble occur during operation, do not leave it. Investigate the cause and take
appropriate measures.
• Read the manual carefully and fully understand what to do in case of trouble.
• The better you understand the construction and function of the unit, the faster you can find a
problem and solution.
• This chapter describes the state, cause and countermeasures of important troubles in detail:
Symptom
Cause
Countermeasures
Low starter revolution
(1) Battery malfunction.
Check battery�
speed.
Charge, change
(1) Fuel filter clogging.
Disassemble, clean, and change
Starter rotates but engine
(2) Fuel pre-filter clogging.
Disassemble, clean, and change
(3)
No diesel fuel oil.
Replenish fuel
does not start.
(4) Air mixing in fuel pipings.
Bleed air
(5) Failure of the engine stop solenoid .
Call your nearest dealer
Discharge air pressure does
(1) Pressure regulator insufficient
Re-adjust (fasten)
not reach 100psi(6.9bar).
adjustment.
(2) Pressure regulator trouble.
Change
(1) Failure of the engine controller
Call your nearest dealer
(2) Unloader orifice clogging.
Disassemble/ Cle an
Engine does not reach its
(3)
Engine trouble.
Call your nearest dealer
(4) Fuel filter clogging.
Disassemble/ Change
maxim um speed.
(5) Water is accumulated in fuel
Drain water
pre-filter.
(6) Air filter element clogging.
Clean or change of element
Revolution drops before
(1) Pressure regulator insufficient
Re-adjust (fasten)
adjustment.
discharge air pressure
(2) Trouble of pressure regulator.
Change
reaches 100psi(6.9bar).
(3)
Unloader orifice clogging.
Disassemble/ Che ck
Engine does not reach
(1) Failure of the engine controller
Call your nearest dealer
minimum revolution at
(2) Failure of the accelerator controller. Call your nearest dealer
unload.
(1) Pressure regulator insufficient
Re-adjust (loosen)
adjustment.
Safety valve relieves at
(2) Unloader valve damaged· Faulty
Change
unload.
seat
(3)
Faulty safety valve.
Change
(4) Engine speed sensor trouble.
Change
(1) Scavenging orifice strainer
Disassemble/Clean
clogging.
Oil mixes in air.
(2) Excessive oil in separator
Drain to its proper level
(poor oil separation)
receiver tank.
(3)
Low discharge pressure.
Unloader Disassemble/Check
(4) Oil separator deteriorated.
Check /Change
(1) Air filter element clogging.
Clean or change of element
Insufficient free air
(2) Unloader valve cannot fully
Call your nearest dealer
delivery.
open.
(3)
Engine does not reach rated
Call your nearest dealer
speed.
5-2
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