Jntech JNP Series - Page 83

83
Fault 202
Grid power
over current
Inverter stop
working, stop
state
disappear,
system will
start
automatically
1,Pump is
short circuit or
blocked.
2,hardware
problem
1,check pump
wiring, and chek if
pump can
working normally.
2,Check if inverter
output is norma.
Fault 203
Bus voltage
undervoltage
the inverter
shut down,
the system
can start
itself after
the
shutdown
state
disappears
.
Grid power
undervoltag
e, or PV
array low
voltage, or
hardware
fault.
Disconnect with
AC input, PV
input, ensure
inverter no
voltage, use
multimeter to
check the
voltage of grid
power and PV
array
separately.
Fault 204
Grid power
phase lose
Inverter stop
working,
stop state
disappear,
system will
start
automaticall
y
A phase or
two-phase
output cable of
grid power is
not well
connected
with inverter.
Disconnect the grid
power and PV input
switch to ensure
that there is no
voltage at the input
of the inverter, and
check the wiring at