M&C TechGroup MP47_D Operator's manual - Manual (Page 20)

20
Gas sampling and gas conditioning technology 6-1.1.1-ME
For recommended spare parts please see section 20.
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 Possible cause Check/Action
Pump produces no
flow No main supply Check power supply; Check plug for correct
fit
Connections or lines are
blocked Remove blockade
An external valve is closed or
a filter is blocked Open valve or clean dirty/blocked filter
Liquid (condensate) has col-
lected in the pump head Let the pump for a few minutes pumping air;
Flow, pressure or
vakuum too low Diaphragm or valves are
weared out Change diaphragm or/and valves
Compare the actual perfor
mance with the figures in
the technical data The pump is not designed for this condition
There is pressure on the
pressure side and at the same
time vacuum or a pressure
above atmospheric on the
suction side
The pump is not designed for this condition
The cross-section of the
pneumatic lines or connected
components is too small, or
they are restricted
To measure the performance, disconnect the
pump from the system (smaller diameter
tubing or a valve can significantly affect
performance)
A leak at a connector, in a
diaphragm/valve plate is
damaged or pump heads
dirty Insulate the leak, tighten the screws, clean
or exchange dirty parts
N O T E !
If the pump does not operate properly and you cannot find any of the above
mentioned faults, send it back to M&C.
If you have been handling dangerous or highly aggressive gases please
clean the pump before dispatch.