4. Troubleshooting
4-8
4.2.9
Discharge air is insufficient
Normal
Air filter clogging
Clean or replace
Clogging is
large
Check function of unloader
valve
Faulty
Less than
3
,000min
-1
Adjust pressure regulator
Replace assembly
Faulty
adjustment Faulty
seating
Adjustment
Normal
Normal
3,000min
-1
Faulty
adjustment of
pressure
regulator
Faulty
pressure
regulator
Check needle valve of
pressure regulator
Is it possible to
adjust pressure
regulator?
Check air filter for clogging
Faulty unloader valve
Too long, narrow
and air leaking
Re-selection of airline and
repair air leak
Normal
Re-selection of air
compressor
Normal
Check whether pressure
increases smoothly when
service valve is closed
quickly while pressure
control valve is functioning
Check air line
up to air tools
Pressure drop
and defects of
air leaking
Late
Check that engine
speed is at high
speed RPM
Disassemble / clean or
replace
A
Faulty selection of air
compressor
Less than
3
,000min
-1
Filter element clogging
Replace it
Clogging
Check fuel filter and
fuel pre-filter
Check how fuel
transported or if any
air mixed
Faulty fuel feed pump or
faulty fuel pipes
Replace feed pump
Repair pipes
Bleed air
Faulty
Check if engine
controller (ECU)
functions well
Faulty engine controller
(ECU) or faulty wire
connection
Replace engine controller
(ECU) or repair wire
connection
Check emergency
controller output
voltage
Abnormality engine
Repair the trouble and get
rid of the cause
Normal
Faulty
Check pressure sensor
output voltage
Faulty pressure sensor
More than
DC0.5V
Replace it
Normal
DC0.5V
Input wire connection or
emergency controller fails
Less than
DC3.0V
Repair input wire
connection or replace
emergency controller
Normal
DC3.0V
B
C
D
※
Normal
Normal
Check purge solenoid valve
for any air leak
Air leak
Normal
Faulty seat
Repair or replace it
Faulty adjustment
Re-adjust
Adjustment
Check whether it is
possible to adjust it by
correcting full load
revolutions
Faulty adjustment
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Summary of Contents for PDS185S-6E1
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