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Section 5: TROUBLESHOOTING
5.1
Vacuum Problems
Leakage, contamination and unusual outgassing are the general causes of problems associated with poor vacuum.
To operate at maximum efficiency a system must be thoroughly clean. If the system is completely clean and free
from leaks, and unwarranted vacuum problems still exist, the pump should be checked. A simple criterion for the
condition of the pump is the determination of its maximum vacuum capability. This can be accomplished by
blocking of the intake and reading the vacuum level on the gauge (See Section 2.8).
5.2
Troubleshooting Guide
Poor Pumping
Speed
X
Poor
Vacuum
X
Loud Unit
X
Possible Cause
Damaged Valves
Corrective Action
Replace flapper valves
X
X
X
Debris in Valves
Remove debris and check
X
X
X
X
X
X
X
X
Damaged Gaskets
Loose Head Screws
Loose fittings
for valve damage
Replace gaskets
Tighten head screws
Tighten fittings
Others Symptoms:
1.
Pump does not turn on - Cause: Inlet under vacuum - Corrective Action: Release vacuum at inlet.
2.
Pump rocks when turned off - Cause: Inlet under vacuum - Corrective Action: Release vacuum at inlet prior
to turning off the pump.
