General Maintenance; Faults, Causes And Remedies - Xylem LOWARA Resiboost MMW09 Manuel D'installation, D'utilisation Et D'entretien

5. Press (6) to confirm and press this several
times to exit the menu, or press (3) with the
LED (10) off.
6. Enter AUTOMATIC mode, press (2), and the
LED (10) is illuminated and steady.
7.7 Calibrate the operating pressure
The converter system is calibrated at the factory for
use. Modify the pressure value in relation to the ac-
tual needs of the system as follows:
• Increase/decrease the value of the pressure SET
POINT.
Check that the system is pressurized and that none
of the utilities are open and the pump is at standstill.
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 (page 31) for additional infor-
mation.
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
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 (page 39), 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
en - Original instructions
(page 26).
List
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