Rev 20220606
RX2505AC
Page
28
of
35
Common
Fault
and
Information
below:
Fault
information
Fault
reason
Suggestion
The
battery
connection
error
No
battery
is
detected
If
the
battery
is
connected
1.
Check
whether
the
battery
cable
is
securely
connected
and
whether
the
battery
voltage
is
normal.
2.
If
the
error
message
remains,
contact
installation
partner.
Battery
under
voltage
or over
voltage
If
the
battery
voltage
is
abnormal,
the internal
circuit
protection is
triggered
1.
Check
whether
the
battery
is
correctly
connected
and
whether
the
battery
voltage
is
normal
2.
Make
sure
the
battery
is
in
good
condition
and
restart
the
module
3.
If
the
error
message
remains,
contact
installation
partner.
No
grid
No
grid
is
detected
If
the
grid
is
connected
1.
Check
whether
the
grid
terminal
is
firmly
connected
and
the
grid
voltage
is
normal;
2.
If
the
error
message
remains,
contact
installation
partner.
DC Bus
under-voltage
The
input
is
suddenly
disconnected
1.
When
the
fault
is
recovered,
the
inverter
will
automatically
return
to
normal
working
state;
2.
If
the
external
environment
does
not
change
and
the
alarm
remains
after
the
system
is
restarted,
contact
installation partner.
DC Bus
over-voltage
The rapid change of
power grid voltage may
cause high energy input
to the inverter. Internal dc-
dc converter or charging
electronics may have a
fault.
1. After the fault error is recovered, the inverter
automatically restores to the normal working
state.
2. If the fault remains, contact installation partner.
Inverter
overvoltage
The
output
voltage
of
the
inverter
is
out
of
the
range.
1.
Check
whether
the
external
load
exceeds
the
specification
range
of
the
inverter.
After
the
fault
is
recovered,
the
inverter
automatically
recovers
to
the
normal
working
state.
2.
If
the
alarm
is
repeated,
contact
installation
partner.
Inverter
undervoltage
Islanding
protection
Islanding
protection
check
1.
Check
whether
the
AC
circuit
breaker
of
the
grid
is
disconnected
and
whether
the
connecting
Table 8-1 – Fault information table 1