73
EN
9. TROUBLESHOOTING GUIDE.
9.1. ERROR MESSAGES.
The single-phase inverter of the EQX2 series has been designed
in compliance with the applicable grid operation standards and
complies with the corresponding safety and EMC requirements.
The inverter has gone through a series of rigorous tests to ensure
its sustainable and reliable operation before shipment.
When a fault occurs, the corresponding error message will be
displayed on the OLED screen, and the inverter may, in this case,
stop injecting power into the grid. The error messages and their
corresponding troubleshooting methods are listed below:
Error
message
Description
Solution
No display
No image on the
display
- Check that all cables are firmly connected
and that the DC switch is turned on.
- Check that the input voltage coincides
with the working voltage.
Network
lost or not
detected
Grid fault, AC
switch or circuit
disconnected.
- Check that there has been a grid fault.
- Check that the AC thermal-magnetic
circuit breaker switches are up and that the
terminals are correctly connected.
Grid voltage
fault
Overvoltage or
undervoltage, mains
voltage higher or
lower than the set
protection value.
- Check that the safety regulation setting
is correct.
- Check the grid voltage. If the grid voltage
exceeds the permitted range of inverter
protection parameters, contact the local
power company.
- Check whether the impedance of the AC
cable is too high. Replace the cable with
a thicker one if this is the case.
Grid frequency
fault
Excessively high or
low grid frequency
with regards to the
protection threshold
set forth.
- Check whether the safety rule settings are
correct or not.
- Check the grid frequency.If it exceeds
the permitted range of inverter protection
parameters, contact the local power
company.
Regarding the
ISO limits
Low system
insulation
resistance, usually
due to poor module/
cable insulation
to earth or in
rainy and humid
environments.
- Check if the photovoltaic panels, cables
and connectors are broken or there are
water leaks.
- Check if there is a reliable earthing
connection.
CFGI error
Excessive leakage
current.
- Excessively high earth current.
- Check the photovoltaic cable to see if it is
short-circuited to earth.
Photovoltaic
overvoltage
The voltage of the
photovoltaic system
is excessively high.
- The input voltage is excessively high.
- Reduce the number of photovoltaic panels
to ensure that the open-circuit voltage of
each string is less than the maximum input
voltage allowed.
Excessive
inverter
temperature
The temperature
inside the inverter
is excessively high
and out of the safe
range.
- Check if the inverter is exposed to direct
sunlight.
- Reduce the ambient temperature.
Error
message
Description
Solution
DCI error
Excessively high
DC injection.
The inverter
detects a high DC
component on the
AC output.
- Restart the inverter; wait a few seconds
until it is restored back to normal.
- If the fault occurs several times, please
contact SALICRU.
Bus voltage
error
Excessively high bus
voltage.
ICS error
Internal
communication
error, possibly due
to a strong external
magnetic field, etc.
SPI error
E2 error
Error in the
GFCI device
Anomaly in
the GFCI device.
AC transducer
error
Anomaly in the AC
transducer.
Relay test
failed
Relay self-test
failure. Neutral
and earth are not
connected properly
on the AC side or
simply fail.
- Use a multimeter to check if the voltage
is high (it should be less than 10 V)
between N and PE on the AC side. If the
voltage is higher than 10 V, the neutral and
earth are not well connected on the AC
side. Alternatively, restart the inverter.
- If neutral and earth are connected
properly, contact SALICRU.
Flash memory
error
Error in the internal
storage, possibly
due to a strong
external magnetic
field, etc.
- Restart the inverter; wait a few seconds
until it is restored back to normal.
- If the fault occurs several times, please
contact SALICRU.
External fan
failure
Anomaly in the
external fan.
- Stop the inverter and disconnect
the AC+DC cables.
- Check if the fan is being blocked by
unwanted objects. If not, replace it.
Internal fan
failure
Anomaly in the
internal fan.
- Restart the inverter; wait a few seconds
until it is restored back to normal.
- If the fault occurs several times, please
contact SALICRU.
Tab. 12. Error messages.
The red LED will be lit on the display for all error messages
(see Tab. 5 ).
EQX2
SOLAR INVERTERS CONNECTED TO THE GRID
USER MANUAL