Owner manual

29
en
8.2 Troubleshooting Guide
PROBLEM PROBABLE CAUSE POSSIBLE REMEDY
The electric pump does not start No power supply Restore the power supply
Main switch on
Green light off Triggering of magneto-thermal Reset the switch
switch
The electric pump does not start or
it stops if it is already running *** = 2 flashes
The main switch is on Motor overload Check the working conditions
Green light on of the electric pump
Red light on (*** flashes) Damaged motor stator Check the motor
*** = 3 flashes
Converter overtemperature Check to see if anything is
preventing the proper cooling
of the converter
*** = 4 flashes
Motor overtemperature (if the Check the working conditions
terminal board is equipped with of the electric pump
the PTC protection)
*** = 5 flashes
Triggering of dry running Check the water level
Check the external device and
the related connection cables
*** = 6 flashes
Problems with the pressure Check the transmitter and
transmitter the related connection cable
*** = 7 flashes
The supply voltage is too low
Users closed Water leaks through the non-return Check the system in order to
Electric pump running with valve or in the system locate the leaks.Repair or replace
speed increasing and any faulty components.
decreasing cyclically Undersized surge tank Check the working conditions
Green light on of the electric pump
Yellow light on Ruptured surge tank diaphragm Replace the diaphragm
Red light off
Setting of work point not suitable Modify the system settings
for the system (the value is higher
than the pressure that the pump
is able to deliver)
Users open Setting of work point not suitable Modify the system settings
The electric pump does not start for the system (the value is equal
Green light on to zero)
Yellow light off
Red light off
The electric pump is running. Setting of work point not suitable Modify the system settings
There are vibrations in the pump for the system (the value is lower
or near the pump than the minimum pressure
that the pump can deliver)
Frequent starts and stops There may be problems with the Check the float switch and the
float switch in the suction tank tank
The electric pump is running There may be problems with the Check the hydraulic connection
always at maximum speed pressure transmitter between the transmitter and the
system