Trouble Shooting - M&C MP Series Instruction Manual

19

TROUBLE SHOOTING

Before working on the pump isolate the power supply securely, then check that the lines are not live. The following
tips for fault-finding are best employed in the sequence shown.
Problem/Indication
Pump produces no flow No main supply
Flow, pressure or
vakuum too low
If the pump does not operate properly and you cannot find any of the above men-
tioned faults, send it back to M&C.
Note
If you have been handling dangerous or highly aggressive gases please clean the
pump before dispatch.
24
Possible cause
Connections or lines are blocked
An external valve is closed or a fil-
ter is blocked
Liquid (condensate) has collected
in the pump head
Diaphragm or valves are worn out Change diaphragm or/and valves
Compare the actual performance
with the figures in
the technical data
There is pressure on the pressure
side and at the same time vac-
uum or a pressure above atmos-
pheric on the suction side
The cross-section of the pneu-
matic lines or connected compo-
nents is too small, or they are re-
stricted
A leak at a connector, in a dia-
phragm/valve plate is damaged
or pump heads
dirty
MP47 | 1.01.02
Check/Action
Check power supply; Check plug for correct fit
Remove blockade
Open valve or clean dirty/blocked filter
Let the pump for a few minutes pumping air;
The pump is not designed for this condition
The pump is not designed for this condition
To measure the performance, disconnect the
pump from the system (smaller diameter tubing or
a valve can significantly affect performance)
Insulate the leak, tighten the screws, clean or ex-
change dirty parts
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