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en - Original instructions
If any of the utilities are open, it is possible to close
the check valve situated downstream of the pump.
1. Enter MANUAL mode, press (2), and the LEDs
(9) and (10) are off.
2. Press (3) for a few seconds and access the BA-
SIC menu (MB) and the LED (10) flashes.
3. Press (6) to select the SP (MMW, MTW) or SET
PRESS (MMA, MTA) parameter.
4. Press (4) and (5) to set the new SET POINT
value.
5. Press (3) to exit the menu and the LED (10)
turns off.
6. Press (2) to select automatic mode and the LED
(10) turns on and remains steady.
7. The pump can turn on and the LED (9) is illumi-
nated.
8. Make sure that the pressure stabilizes at the re-
quired value, as seen on the pressure gauge or
on the display of the converter.
9. The pump stops automatically. The stopping
pressure might be slightly above the required
value.
NOTICE:
Make sure that the new SET POINT pressure value
is within the range of the head indicated on the data
plate of the pump.
Refer to
User interface
on page 32 for additional in-
formation.
8 Maintenance
Precautions
WARNING:
• Observe accident prevention regula-
tions in force.
• Use suitable equipment and protec-
tion.
• Always refer to the local and/or na-
tional regulations, legislation, and co-
des in force regarding the selection of
the installation site, plumbing, and
power connections.
8.1 General maintenance
Electrical Hazard:
Before any service or maintenance, dis-
connect the system from the power sup-
ply and wait at least 2 minutes before
starting work on or in the unit.
Turn off and unplug the system before in-
stalling the unit or carrying out mainte-
nance.
• Converter models MMW09, MTW10, MMA06,
and MTA06 do not require any routine mainte-
nance when used within the limits that are indi-
cated in
Technical data
• Converter models MMA12 and MTA10: depend-
ing on the type of environment, for example if
there is dust in the air, check (every 6–12
44
on page 27.
months) the working order of the radiator cooling
fan.
• Converter models MMA and MTA: if necessary,
and in relation to the type of environment, re-
move any dust or other material that has settled
on the dissipator.
• The pumps do not require any routine mainte-
nance. Refer to the manual provided with the
pump.
• Check the air precharge value of the diaphragm
tank, when applicable, a minimum of once a
year.
• It is advisable to periodically check correct trig-
gering of the high sensitivity differential switch
(30 mA) [RCD, residual current device] suited to
the ground fault current with pulsed or direct
components (we recommend a device with Type
B characteristic) and connected to the power line
of the converter.
9 Troubleshooting
Introduction
In addition to the alarm troubleshooting guide in
of alarms
on page 40, we also provide a guide for
troubleshooting other possible problems.
Electrical Hazard:
• Make sure that all connections are
performed by qualified installation
technicians and in compliance with
the regulations in force.
• Always disconnect and lock out pow-
er before servicing to prevent unex-
pected startup. Failure to do so could
result in death or serious injury.
• Wait a minimum of two minutes be-
fore opening the converter.
9.1 Faults, causes, and remedies
The pump does not run, the main switch is on
and none of the LEDs are illuminated
Cause
Solution
No power supply Restore the power supply and
check that the mains connection
is intact.
Triggered over-
Reset the overload circuit break-
load circuit
er.
breaker
Triggered ground
Reset the differential protection.
fault protective
device or circuit
breaker
Main fuse of the
Replace the fuse.
converter blown
In the case of
Replace the capacitor if it is an
single-phase
external one. Contact the local
pumps, the motor
sales and service representative
capacitor is faul-
if it is an internal capacitor.
ty.
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