- 24 -
overvoltage
after the fault is elimi-
nated
power grid.
2-111
Over frequency
of power grid
When the inverter is shut
down, the inverter is
operated automatically
after the fault is elimi-
nated.
1.Check whether the grid
connection is good.
2.Check whether the pow-
er grid amplitude is stable.
3.Check whether the pow-
er grid frequency is stable.
4.
If the fault exists all the
time, contact the Hefei
Jntech customer service
center.
2-112
Under frequency
of state grid
2-113
amplitude
overvoltage
of
state grid
2-114
amplitude under
voltage of state
grid
2-115
Unfinished phase
lock of state grid
2-200
AD 0 error when
power up
DC AC Module sampl-
ing anomaly, inverters
can not start operat-
ion
1.Restart the inverter.
2.If the fault exists all the
time, contact the Hefei
Jntech
customer
service
center.
2-201
Inverter IGBT
fault
When the inverter is shut
down, the inverter is
operated automatically
after the fault is
eliminated
1.Restart the inverter.
2.If the fault exists all the
time, contact the Hefei
Jntech
customer
service
center.
2-202
Three
consecutive IGBT
failures in 15min
When the inverter is shut
down, the inverter is
operated automatically
after the fault is elimi-
nated
1.Waiting for the inverter to
return to normal.
2.If the fault exists all the
time, contact the Hefei
Jntech
customer
service
center.
2-204
DC AC Busbar
overvoltage
When the inverter is shut
down, the inverter is
operated automatically
after
the
fault
is
eliminated
1. Measurement of open
circuit voltage of PV array.
2. Check whether the
connection mode of PV
module
meets
the
requirements
of
the
inverter.
3. Check whether the power
grid voltage is stable.
2-205
Fault of middle
point voltage of
capacitance
When the inverter is shut
down, the inverter is
operated automatically
after
the
fault
is
eliminated
1.Waiting for the inverter to
return to normal.
2.If the fault exists all the
time, contact the Hefei
Jntech
customer
service
