4. TROUBLE SHOOTING
* If the troubles are not resolved by the above-mentioned actions, the cause may possibly be located in Pump
operation condition. In such case, please contact us with the following information.
1. Model Name & Number, Serial Number, Application, etc.
2. Information of Piping (Valves, Strainer, Number of Bends, etc.)
PROBLEM
CAUSE
SOLUTION
Insufficient
Air quantity
·
Filter is clogged
·
Too much Clearance
·
Clean or Change FILTER
·
Check Clearance
Overload on
Electric Motor
·
Filter is clogged
·
Foreign matter are caught in.
·
Pressure loss in Piping is increased
(increase in Suction pressure)
·
Interference between Screws.
·
Interference between Screw and Casing
·
Discharge line is clogged
·
Clean or Change Filter
·
Adjust or Replace the Screw and Casing
·
Check the pressure difference between
Inlet and Outlet
·
Adjust improper Screw clearance.
Adjust Timing Gear
·
Make the Side Clearance larger / Make
the clearance between Screw & Casing
larger.
·
Drain & clean Discharge line
Overheat
·
Excessive lubricant in Front End Cover
·
Vacuum Pump inlet temperature high
·
Too much Compression ratio
·
Interference between Screw and Casing
·
Problem with Cooling water flow
·
Check Oil level
·
Check suction & discharge pressure
·
Search for the cause of interference
·
Clean Cooling water line
Knocking
·
Interrelated position between Timing Gear
and Screw is incorrect
·
Improper assembly
·
Abnormal rise in pressure
·
Damage on gear due to overload or
improper lubrication
·
Reposition
·
Reassemble
·
Search for the cause
·
Replace Timing Gear
Bearing or Gear
damaged
/Shaft broken
·
Improper lubricant
·
Lubricant runs short
·
Overload
·
Change lubricant
·
Refill lubricant
·
Replace the Shaft
