09 Maintenance
User Manual V1.0-2023-10-30
73
No. Fault
Cause
Solutions
33
BUS Overvoltage
1. The PV voltage is
too high.
2. The sampling
of the inverter
BUS voltage is
abnormal.
Disconnect the AC output switch and DC input
switch, then connect them 5 minutes later.
Contact the dealer or the after-sales service if
the problem persists.
34
Internal Comm
Loss
1. Frame format
error
2. Parity checking
error
3.
Can bus offline
4. Hardware CRC
error
5. Send (receive)
control bit is
receive (send).
6. Transmit to the
unit that is not
allowed.
Disconnect the AC output switch and DC input
switch, then connect them 5 minutes later.
Contact the dealer or the after-sales service if
the problem persists.
35
PV Software
Overcurrent
Abnormal changes
in lighting or the PV
panel is far from the
inverter.
1. If it occurs accidentally, it may be due to
abnormal lighting, and the inverter will
automatically resume normal operation
without manual intervention.
2. If it occurs frequently, please contact your
dealer or after-sales service center.
36
The PV string
is connected
reversely.
The PV string is
connected reversely.
Check whether the PV1 and PV2 strings are
connected reversely.
37
PV Continuous
Hardware
Overcurrent
1. The PV
configuration is
not proper.
2. The hardware is
damaged.
Disconnect the AC output switch and DC input
switch, then connect them 5 minutes later.
Contact the dealer or the after-sales service if
the problem persists.
38
PV Continuous
Software
Overcurrent
39
Battery Reverse
Connection Fault
Reverse connection
of positive and
negative electrodes
of the battery
Check if the positive and negative terminal
connections between the battery and the inverter
side battery are correct.