10. TROUBLE SHOOTING
Earth Fault Alarm
This inverter complies with IEC 62109-2 clause 13.9 for earth fault alarm
monitoring. If an Earth Fault Alarm occurs, the error code 6 will be
displayed on the LCD. Red LED indicator will also light up.
If an external indication of earth fault alarm is required, please connect PV
System to inverter monitoring app/portal. The monitoring platform will
send email notification in the event of an Earth Fault. Please refer to Sector
6.1 and the Wi-Fi stick guide on how to setup your inverter communication
function.
Full Error Code and Corrective Measures
When the PV system does not operate normally, we recommend the
following solutions for quick troubleshooting. If an error occurs, the Error
code will be displayed on the inverter’s screen or on the monitoring App/
Web, the red LED will light up. The corresponding corrective measures are
as follows:
Error Code
Fault Name
Description
Corrective Measures
1
Functional
fault in
Micro-
Controller
Unit (MCU)
MCU abnormal
self-check in
start process
Disconnect the inverter from the utility
grid and the PV array, and reconnect it
after LED turns off. If this fault is still being
displayed, please contact service.
2
A faulty
current
sensor
detected
AC current sensor
detect current
abnormal in the
start process
Disconnect the inverter from the utility grid
and the PV array, and reconnect it after
LED turns off. If this fault is still being
displayed, please contact service.
3
Ground fault
circuit
interrupter
(GFCI)
GFCI sensor self-
check abnormal
Disconnect the inverter from the utility
grid and the PV array, and reconnect it
after LED turns off. If this fault is still being
displayed, please contact service.
4
A faulty grid
relay detec-
ted
The difference
between INV
voltage and
output voltage
exceeds limit.
1. Disconnect the inverter from the utility
grid and the PV array, and reconnect it
after LED turns off.
2. If the fault persists, measure the phase
to phase voltage and phase to zero and
zero to ground voltage with a multimeter
to ensure that the voltage is normal and
the zero to ground voltage value should
not be greater than 10V.
3. Disconnect the inverter from the utility
grid and the PV array, and reconnect it
after LED turns off. If this fault is still being
displayed, please contact service.
5
PV voltage
too high
When the PV
voltage of any
circuit is greater
than 600V, it is
determined as the
PV voltage is too
high.
Check the open-circuit voltages of the
strings and make sure it is below the
maximum DC input voltage of the
inverter. If the input voltage lies within
the permissible range while the fault
occurs, please contact the service.
6
Surface
insulation
resistance
error
In the process of
power on and start-
up, the insulation
impedance of PV +
and PV - to ground
is detected. When
the detection
insulation
impedance is less
than 200kohm, it is
judged as insulation
fault.
1. If it happens occasionally, it may be
caused by rainy or humid environment.
After the fault is eliminated, the inverter
can resume normal operation without
other actions.
2. If there is continuous alarm, please
check the PV array’s insulation to ground
and make sure that the insulation
resistance to ground is greater than
200KΩ. Otherwise, visual inspection of all
PV cables and modules. Make sure the
grounding connection of the inverter is
reliable.
If all above are normal, please contact the
service.
7
Ground fault
circuit
interrupter
(GFCI)
exceeds the
permissible
range
residual current
over the
permission range
1. Make sure the grounding connection
of the inverter is reliable.
2. Make a visual inspection of all PV
cables and modules.
3. If this fault is still shown, contact the
service.
8
Inverter
temperature
too high
Heat sink and
internal
environment
temperature
higher than 85
degree
Please confirm:
1. Whether the airflow to the heat
sink is obstructed.
2. Whether the installation site is in
direct sunlight and ambient
3. temperature around the inverter
is too high.
If all above is normal, contact the service.
25
24
V.
2
V.
2
