4
Failure cause and measures
4-5
4.2
Troubleshooting
If any trouble occurs 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 machine, the faster you can find a
problem and solution.
This chapter describes the symptom, cause and countermeasures of important troubles in detail:
4.2.1
Compressor
Symptom Cause
Countermeasures
Low starter revolution speed.
(1)Faulty battery.
(2)Failure of battery charging
(3)Failure of alternator
(4)Failure of starter
Check battery
→
Charge
Change
Change
Change
The starter rotates normally
but the engine does not start.
(1)Fuel filter clogging.
(2)Clogging of fuel pre-filter
(3)No fuel
(4)Air entry into fuel line system
(5)Nozzle clogging
Disassemble, clean, and
change
Disassemble, clean, and
change
Fuel replenishment
Bleed the air
Disassemble/Clean
The discharge air pressure
will not rise.
(1)Pressure regulator insufficient
adjustment.
(2)Trouble of solenoid valve for starting
unloader
Re-adjust (Fasten)
Change
The engine does not reach the
rated revolution speed.
(1)Faulty engine controller
(2)Clogging of the unloader orifice
(3)
Trouble of emergency controller
(4)Engine trouble.
(5)Fuel filter clogging
Call your nearest dealer
Disassemble/Clean
Call your nearest dealer
Call your nearest dealer
Disassemble/Change
If the discharge pressure will
not increase to the specified
one, RPM will drop.
(1)Pressure regulator insufficient
adjustment.
(2)Trouble of pressure regulator
(3)Clogging of the unloader orifice.
Re-adjust (Fasten)
Change
Disassemble/Check
Engine does not reach
minimum revolution at
unload.
(1)Faulty engine controller
(2)
Trouble of emergency controller
Call your nearest dealer
Call your nearest dealer
Safety valve relieves at
unload.
(1)Pressure regulator insufficient
adjustment.
(2)Unloader valve damaged/Faulty seat
(3)Faulty safety valve
Re-adjust (loosen)
Call your nearest dealer
Change
Oil mixes in air.
(poor oil separation)
(1)Scavenging orifice strainer clogging
(2)Excessive oil in separator receiver tank
(3)Low discharge pressure
(4)Oil separator deteriorated
Disassemble/Clean
Drain to its proper level
Disassemble and check of
pressure control valve
Check/Change
Water found mixed in air.
(Condensate separation
malfunctioned.)
For after-cooler type only
(1)Clogging of silencer at after cooler
drain outlet
(2)Inside of piping between drain
separator and silencer clogged with
dust
Disassemble/Clean/Change
Disassemble/Clean
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