Instructions Manual
－
Multiple Roots Type Dry Pump GR60/90/180
YK09-0023-DI-003-02
32
Trouble
Cause
Disposal method
Remarks
The pressure does not
decrease.
The exhaust capacity of the
pump is low compared to the
capacity
of
the
vacuum
chamber.
Set up the pump again.
5.1
The pressure measurement
method is wrong.
Measure the pressure correctly.
The vacuum meter is not
appropriate.
Adjust to the correct measuring
pressure range and measure
using a correctly calibrated
vacuum meter.
The pipe connected to the
intake port is thin or the
distance of the pipe is long.
Connect with a pipe having a
diameter more than that of the
suction port to shorten the
distance
to
the
vacuum
chamber.
The metal net at the intake port
is clogged.
Remove the pipe at the upper
part of the intake port and clean
the metal net.
The amount of oil does not
satisfy the specified value.
Supply the specified amount of
oil.
3.2, 7.1
The oil deteriorates.
Replace the oil.
3.2, 7.1
There is leakage in the pipe to
which the pump is connected.
Find the leak point using a
device, such as a leak detector,
and stop the leak.
Our genuine oil is not used.
After an overhaul of the pump,
replace with the our genuine oil.
3.2, 7.1, 7.3
Water enters the pump.
Warm-up operation / Overhaul
(Removal of Moisture)
7.3
The pump surface
temperature is
extremely high (70
ﾟ
C
or more).
The amount of oil does not
satisfy the specified value.
Control the oil level or supply
the specified amount of oil.
3.2, 7.1
The aspirating gas temperature
is high.
Install a cooling device, such as
a gas cooler, to the intake side.
The cooling water does not
circulate.
Supply cooling water.
3.6
The pump is surrounded.
Ventilate.
The ambient temperature is
high.
Use in a ventilated environment.
0.53
The motor current
value is extremely
high.
Foreign
substances
are
included in the pump.
Overhaul (Remove the foreign
substances in the pump.)
7.3
Continuously operated at a high
inlet pressure.
Adjust the pressure.
The motor's direction of rotation
is opposite.
Make wire connections again to
correct the direction of rotation.
3.7
Содержание GR60
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