Alarm
Notification LED
Description
Possible solutions
A16 CPU
alarm
10 flashes of the
yellow alarm led
Communication error between the
control part and the power part or er-
ror in the CPU.
Reset mode:
• Automatic reset
• Check the value of the power supply voltage both under no
load and load conditions.
• Check for electrical noise from other devices connected to
the system.
• Check the integrity of the communication cable between the
control board and the power board.
A19 Out
of step
Yellow alarm
LED on and
alarm display via
App.
Loss of motor control
Reset mode:
• Automatic reset with a 3-minute de-
lay.
• Check the possible solutions for the alarm A01 Overcurrent
motor
14. Warnings
Warning
Description
Possible solutions
W01 Digital input active
1
Digital input 1 has been activated.
• Check the configuration and connections to digital input 1.
W02 Digital input active
2
Digital input 2 has been activated.
• Check the configuration and connections to digital input 2.
W03 Digital input active
3
Digital input 3 has been activated.
• Check the configuration and connections to digital input 3.
W04 Digital input active
4
Digital input 4 has been activated.
• Check the configuration and connections to digital input 4.
W05 Minimum irradia-
tion
In control mode MPPT, when parame-
ter Full scale solarimeter is greater than
0, the irradiation reading has fallen be-
low the value set for parameter Min
stop irradiation.
• Check that the parameters Full scale solarimeter and Min stop irra-
diationare set correctly.
W18 Minimum flow
In control mode MPPT, when parame-
ter Flow Measure is active, the flow rate
reading has fallen below the value set
for parameter Min stop flow.
• Check that the parameters Flow Measure and Min stop floware set
correctly.
W19 Flow switch active
In control mode MPPT, when parame-
ter Dig. input 2/3 delay is greater than
30 seconds, the digital input 2, to which
the flow switch is connected, has been
activated.
• Check the correct configuration of digital input 2.
• Check the correct operation of the flow switch and the connection to
digital input 2.
• Check the value of parameter Dig. input 2/3 delay.
W20 Temp. derate
The inverter is limiting the maximum
motor frequency to keep the inverter
temperature below the maximum limit.
• Check the possible solutions for the alarm A03 Over temperature
inverter.
W21 Overload 15V
15V power supply overload.
• Check the absorption of the loads and any short circuits connected
to the 15V power supply
W22 EEPROM COM.
No communication with EEPROM
• Contact the technical support service.
W23 EEPROM fault
Failure in EEPROM
• Contact the technical support service
W24 Low PV energy
The energy from the photovoltaic pan-
els is insufficient to drive the motor until
it reaches its minimum frequency.
The inverter attempts an automatic start
every 5 minutes.
• Check the available photo voltaic power in relation to the motor and
pump power.
• Check the series and parallel connections of the photovoltaic pan-
els.
• Check the photovoltaic system open circuit voltage and short circuit
current.
• Check the short-circuit current of the photovoltaic system. The short-
circuit current is proportional to the available irradiation.
• Check the available power in relation to the available irradiation.
• Check that the surface of all panels is clean and free from shading
(even partial).
• Check that the value of parameter Min motor frequency is not too
high compared to parameter Max motor frequency. It usually doesn’t
exceed 80%.
• Check the other motor parameters.
W25 Alarm slave X
In control mode COMBO, the master
has detected an alarm in the X slave.
• Check the status of the XX slave unit indicated by the master.
W26 No water
The power factor (cosphi) of the motor
read by the device is permanently be-
low the value set in the parameter Dry
run cosphi.
• Check that the pump is properly primed.
• Check that the pump is turning in the correct direction.
• Check that the parameter Dry run cosphi is set correctly.
SUND
36
