Jntech JNP11KH-V5 - Page 82

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2. If this
happen
frequently,
please contact
the supplier.
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
undervoltage
, 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.