System Setup And Operation - Lowara ResiBoost MMW Manuel D'installation Et D'entretien

en - Original instructions
stops the electric pump when the voltage value ex-
ceeds the permitted limit (254 V). The pump auto-
matically starts up when the voltage drops below the
limit (chapter 2.5).
Troubleshooting:
• Problems with the power line: contact the utility
provider.
• For systems with more than one pump, the elec-
tric pump with converter acts as a current gener-
ator when the non-return valve of the hydraulic
system is faulty. The water flows through the
non-return valve in the opposite direction.
• The DC Bus power circuit of the converter is faul-
ty.
N° Text on Model
the dis-
14
play ( )
A9 UNDER MMW
VOLT
MTW
MMA
MTA
An automatic function of the converter that detects
the voltage value of the power line. The converter
stops the electric pump when the voltage value is
below the permitted limit (184 V). The pump auto-
matically starts when the voltage exceeds the limit.
See Technical data on page 27.
The alarm appears correctly moments before shut-
down.
Troubleshooting:
• The cross-section of the power cable for the con-
verter is too small. Replace the cable with one of
a suitable cross-section taking into account the
voltage drop at the supply point of the converter.
• The power cable for the converter is too long.
Replace the cable with one of a wider cross-sec-
tion taking into account the voltage drop at the
supply point of the converter.
7 System Setup and
Operation
7.1 Parameters to check upon startup
Check the following programming parameters upon
startup:
Display for Display for
MMW and MMA and MTA
MTW
A NOM.CURR
42
Descrip- Reset
tion
Alarm in- Automat-
dicating ic
that the
voltage
supply of
the con-
verter is
too low
Description
Enter the rated
current value of
the motor indi-
cated on the da-
ta plate.
Entering the in-
correct value
can result in
damage to the
electric pump or
Display for Display for
MMW and MMA and MTA
MTW
EL EXT.LOW WA-
TER
SP SET PRESS
MP MIN.PRESS
Description
trigger an unan-
ticipated over-
current alarm. If
the length of the
motor's power
cable is ≥30m,
refer to Applica-
tions with very
long cables on
page 32.
If there is a level
sensor, enable
control at the
digital input to
protect against
dry running. The
pump restarts
automatically
when the mini-
mum operating
limit is reached.
The operating
pressure of the
pump needs to
be set.
If the value en-
tered is not cor-
rect in relation
to the needs of
the system, it
must be in-
creased or de-
creased accord-
ingly.
If more than 1
minute is re-
quired to fill the
system during
initial start-up
and the convert-
er triggers the
dry running
alarm, increase
the MP parame-
ter
(MIN.PRESS)
as long as the
pumps are run-
ning. (Make
sure that the
pumps are
primed). Lastly,
decrease the
MP parameter
(MIN.PRESS) to
the minimum
permitted pres-
sure.
Set the mini-
mum pressure
below which the
pump is auto-
matically stop-