Xylem Lowara ResiBoost MMW Manual De Instalación, Funcionamiento, Mantenimiento página 41

An automatic function of the converter that detects
current consumption while the motor is running. The
converter cuts out the power supply to the motor and
remains locked.
Troubleshooting:
• In the case of single-phase motors, the thermal
circuit breaker (motor protector) trips automati-
cally. The circuit breaker is located in the terminal
box, a separate electrical panel or in the motor,
depending on the model of the electric pump (re-
fer to the relative manual).
• Breaking or failure of a phase of the motor.
• Failure/disconnection/deterioration of a phase of
the motor's power cable.
• Breaking of the converter's fuse, refer to
13 on page 256 and Figure 15
• For single-phase submerged motors with float.
Check the float to see if it is broken or has trip-
ped.
N° Text on Model
the dis-
14
play (
A4 PRESS MMW
MIN
MTW
MMA
MTA
The pressure of the system does not exceed the set
value of the MP (MMW/MTW) or (MMA, MTA) pa-
rameter. After the delay dL (MMW, MTW) or MP DE-
LAY (MMA, MTA), the pump is stopped and protect-
ed against dry running. The ART function is activat-
ed. See Special functions
Troubleshooting:
• No water on the intake side of the pump: check
the level or pressure of the water.
• Pump not primed. Prime the pump.
• The pipe on the delivery side of the pump is bro-
ken. The flow of water is too high.
• The pump (impeller or diffuser) is damaged. Con-
tact the technical assistance service.
• The motor is damaged and must be replaced.
N° Text on Model
the dis-
14
play ( )
A5 FAULT MMW
SENS
MTW
MMA
MTA
Troubleshooting: The pressure sensor is faulty.
• For the models MMW and MTW, the sensor is in-
ternal. Contact the assistance service.
• For the models MMA and MTA, the sensor is ex-
ternal and the alarm is triggered with a < 3.2 mA
or > 22 mA signal.
• Check that the sensor and connector are con-
nected.
• Open the cover and check that the power cord of
the sensor is connected and secured to the ter-
minals. See Figure 15
Figure
on page 258.
Descrip- Reset
tion
Minimum Automat-
pressure ic, with
alarm reset
tests.
on page 39.
Descrip- Reset
tion
Fault Automat-
with the ic
pressure
sensor
on page 258.
• Check the cable of the sensor is connected cor-
rectly. See Figure 15
• The power cable of the sensor has deteriorated:
replace the cable.
• Replace the faulty sensor.
N° Text on Model
the dis-
14
play ( )
A6 OVER MMW
TEMP
MTW
MMA
MTA
Troubleshooting:
• Models MMW and MTW: the temperature of the
power module has reached the value of 80°C. In
AUTOMATIC mode, the converter stops the
pump and does not restart it until the tempera-
ture falls below 60°C.
• Models MMA and MTA: The cooling fan turns on
at 60°C and turns off at 50°C (both MMA12 and
MTA10 have a fan). If the temperature reaches
85°C, the output frequency of the motor is auto-
matically reduced by 3Hz down to 75°C. At 95°C,
and in AUTOMATIC mode, the converter stops
the pump and does not restart it until the temper-
ature falls below 80°C.
• Models MMW and MTW:
– The temperature of the water exceeds the
limits for use of the converter. See
data on page 27.
• The power module is faulty: contact the assis-
tance service.
• The ambient temperature exceeds the limits for
use of the converter. See
27.
• Models MMA12 and MTA10:
– The cooling fan is faulty. Contact the assis-
tance service.
• The cooling fan does not work.
– Open the cover and check the power cable of
the fan is connected and secured to the rela-
tive terminals. See
N° Text on Model
the dis-
14
play ( )
A7 SHORT MMW
CIRC
MTW
MMA
MTA
en - Original instructions
on page 258.
Descrip- Reset
tion
Alarm in- Automat-
dicating ic.
that the
power
module
of the
converter
has su-
perheat-
ed
Technical
Technical data on page
Figure 15 on page 258.
Descrip- Reset
tion
Alarm in- Automat-
dicating ic. A max
a short of 4 at-
circuit on tempts to
the pow- start are
er supply made at
side of 2 second
the mo- intervals.
tor The
pump is
perma-
nently
41