M&C TechGroup MP26-H1 Operator's manual - Manual (Page 17)

17
Gas sampling and gas conditioning technology 5-2.1.5-ME
16 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 Action/Check
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 blocked/dirty filter.
Liquid (condensate) has
collected in the pump head. Let the pump for a few minutes pumping air.
Flow, pressure or
vacuum too low Diaphragm or valves are
weared out. Change diaphragm or/and valves.
Compare the actual per-
formance 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 pneu-
matic 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 per-
formance).
A leak at a connector, in a
line or in the pump head. Insulate the leak, tighten the screws, clean or
exchange dirty parts.
N O T E !
If the pump does not operate properly and you can not find any of the above
mentioned faults, send it back to M&C.
If you send the pump for repair please include information about the me-
dium it was handling.
In particular, if it was handling aggressive substances our engineers must
be informed.
If you have been handling dangerous or highly aggressive gases please
clean the pump before despatch.