M&C TEC1 Series, Operation Manual

Page: 76 / 78

28 MP- 4.01 www.mc-techgroup.com
Trouble shooting
Warning
High voltage!
Working without disconnecting the power supply may cause an electrical
shock. Disconnect power supply before any assembly, maintenance or
disassembly.
Secure the pump against accidental restart.
Problem/Indication Possible cause Check/Action
Pump produces no
flow
No main supply Check power supply; Check power cable for
correct fit.
Connections or lines are
blocked. Remove blockage.
An external valve is closed or a
filter is blocked. Open valve or clean contaminated/blocked fil-
ter
Liquid (condensate) has col-
lected in the pump head. Operate pump with air for a few minutes. In-
stall the pump at the highest elevation point of
your system.
Flow, pressure or
vakuum too low
Bellows or valves are damaged
or worn out. Change bellows or/and valves. The valve
plates need to be replaced, when they are <
The pump is not designed for
these operating parameters. Compare the actual operating parameters:
pressure, vacuum and capacity with the data
8
There is overpressure on the
pressure side and at the same
time vacuum on the suction
side. Check the pump with pressureless suction
side and compare values with parameter
characteristic graph. If ok: check system pa-
rameters; not ok: see "Bellows or valves are
damaged or worn out".
Pneumatic lines or connecting
parts have a too small cross-
section. To measure the performance values, uncou-
ple the pump from the system; even a line
with a too small cross-section or e. g. a valve
installed in the system can change the meas-
ured value considerably.
A leak at the connectors, lines
or pump head. Bellows or
valve plate is damaged or
pump head is contaminated. Seal the leak, tighten the screws, replace
damaged parts, clean or replace contami-
nated parts.