Trouble Causes Processing method
Pump surface
temperature is
abnormally high
Oil does not reach the specified
amount.
Refilling to correct oil level.
Decomposition check.
Cooling water does not flow.
Inspect the pump and keep water
Supply smooth.
High intake gas temperature.
Gas cooler installed at the intake port.
High ambient temperature.
Install air conditioner to reduce
Ambient temperature.
No ventilation around the pump.
Excessive discharge pressure.
Check the backing pump to check if
the piping is blocked.
Rotor rotation is not flexible.
Working at high suction pressure.
Intake pressure is higher than the
maximum allowed pressure.
Check the pressure, check backing
pump.
Pressure does
not drop
Pressure measurement method
error.
Vacuum gauge is not suitable.
Change to suitable vacuum gauge.
Relative to the capacity of the vacuum
chamber, the pumping
speed is small.
Refilling to the correct oil level.
Did not use the oil specified by the
company.
Replace with recommended oil.
Check leaks and plugging.
Pressure of the backing pump
deteriorates.
Check the backing pump (oil change
or overhaul).
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