47
User Manual V1.0-2022-01-17
09 Maintenance
No. Fault Cause Solutions
5 Isolation Fail
1. The PV system is
short-circuited to
the ground.
2. The PV system
is in a moist
environment and
the circuit is not
well insulated to
the ground.
1. Check whether the PV input cables are
broken.
2. Check whether the module frames and
the metal bracket are securely grounded.
3. Check whether the AC side is properly
grounded
Inverters sold in Australia and New Zealand will
also alarm as following when Isolation Fail occurs.
1. Inverters support WiFi communication: An
email about the fault will be sent to the user
automatically.
2. Inverters do not support WiFi communication:
The buzzer in the inverter will sound for 1
minute. If the problem persists, the buzzer will
sound every 30 min.
6 DC inject High
DC injection exceeds
the allowed range.
1. Check whether the software version is
the latest one.
2. Restart the inverter and check whether
the inverter can work properly.
7 Ground I Fail
The input insulation
impedance to the
ground decreases
when the inverter is
operating.
1. Check whether the working environment
of the inverter meets the requirements.
For example, the fault may occur due to
high humidity on rainy days
2. Make sure that the components are
properly grounded and the AC side is
properly grounded.
8 PV Over Voltage
Excess PV modules
are connected in
the series, and the
open-circuit voltage
is higher than the
operating voltage.
1. Check whether the PV string input
voltage consistent with the value
displayed on the LCD.
2. Check whether the PV string voltage
meets the maximum input voltage
requirements.
To Next Page
Loading...
Need help?
General
