AirMan PDS185S-6E1, Руководство по обслуживанию

Страница: 83 / 103

4. Troubleshooting
4-9
※
For the detailed countermeasures, refer to “Service manual” published by engine manufacturer.
4.2.10 Purge control operation will not start even if AUTO IDLE (purge control)
switch is pressed
※
As the output voltage of intake negative pressure sensor at unload operation is very little, it is better
to check the function of purge control operation after replacing the sensor with new one, if it is found
difficult to diagnose the trouble.
Lower than
15
％
Faulty setting of purge
operation load factor (b)
15
％
10sec
No air leak
Service air piping leaking
Air leak
Faulty setting of the time
required for switching to
purge operation (T)
Set time is
too long
Adjust (See 1.6.2)
Check AUTO IDLE switch
wire connection
Disconnection or faulty
contact between emergency
controller
－
auto idle
switch
－
ground
Wire
disconnected
Repair wire connection
Trouble of intake negative
pressure sensor
Abnormal
output
voltage found
Replace it
Not wire
disconnected
Key ON when stopping
：
DC0.5V
At unload
：
Less than DC0.5V
At no load:
Not electrically
connected
Repair or replace it
Repair wire connection
Trouble of emergency
controller
Repair or replace it
At no load:
Electrically connected
Normal
Disconnection or faulty
contact between emergency
controller and intake
negative pressure sensor
Wire
disconnected
Repair wire connection
Not wire
disconnected
※
Check service piping for
any air leak
Check setting of purge
operation load factor (b)
Check setting of the time
required for switching to
purge operation (T)
Check intake negative
pressure sensor output
voltage of “Key ON when
stopping” and “At unload”
(See 3.12)
Check wire connection
between intake negative
pressure sensor and
emergency controller
Check electrical connection
to solenoid valve for
starting unloader / purge
Trouble of solenoid valve
for starting unloader /
purge
Abnormal (Short-circuit etc.)
Check wire connection between emergency
controller and solenoid valve for starting
unloader / purge
Abnormality compressor
air-end
Disassemble / check
Repair
Check the pressure
difference before and after
oil separator equipped
Differential
pressure is
large
Normal
Faulty oil separator Replace it
19.3
－
21.4psi
(98.1
－
147kPa)
[0.98
－
1.47bar]
Adjust (See 1.6.2)
Repair air piping
Discount-Equipment.com