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6.5
Troubleshooting
The following table can be used for fault diagnosis.
Possible cause
Poor pump output
•
Vacuum filter soiled
•
Suction line leaking
•
Instrument leaking
•
Underspeed
•
Lack of operating water
•
High operating water feed temperature
1)
Abnormal noise
•
Poor machine alignment
•
Bearings worn
•
Operating water grossly contaminated
•
Incorrect speed
•
Pressure has changed
•
Vacuum has changed (higher vacuum needed)
•
Vent line blocked
•
Operating water temperature high
•
Foreign object in the machine
Operating pressure or operating vacuum cannot be obtained
•
Incorrect pressure gauge or vacuum gauge reading
•
Vee belt slip
•
Directional control valve at wrong position
•
Operating water feed disturbed (not enough or no water)
Operating water temperature high (above 55 °C)
•
Not enough water in the operating system
•
Cooling unit soiled
Sludge or liquid has entered the machine
•
Vehicle oversucking
High power consumption
•
Overspeed
•
Exceedingly high output pressure
•
Pressure gauge reading wrong
4990671000 February 2008
All failures should be repaired without delay.
The machine should not be started until the fail-
ure has been repaired.
Repairs must only be carried out by qualified
technical personnel.
Remedy
•
Clean vacuum filter
•
Locate and repair leak
•
Replace leaking instrument
•
Run at prescribed speed
•
Top up operating water to maximum level
•
Inspect the operating water cooling system
•
Re-align machine
•
Replace bearings or have them repaired
•
Change the operating water
•
Keep within speed limit
•
Keep within rated pressure
•
Keep within rated vacuum / inspect, clean exhaust air
system
•
Inspect and/or clean vent line
•
Inspect the operating water cooling system
•
Remove foreign object immediately and flush the
machine
•
Replace pressure gauge / vacuum gauge
•
Inspect Vee belt tension, re-tension if necessary
•
Set directional control valve to correct position
•
Ensure sufficient operating water supply
•
Top up operating water & recirculate water until water
temperature is less than
•
Clean cooling unit
•
Clean the machine; check the operating water, change if
necessary
•
Keep within speed limit
•
Keep within rated pressure, actuate/check safety valve
•
Replace pressure gauge
27
Operation
55°C
.
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