82
F
Fa
au
ulltt
n
na
am
me
e
E
Exxp
plla
an
na
attiio
on
n
F
Fa
au
ulltt
sse
evve
erriittyy
M
Me
ea
assu
urre
ess
PV pol-
rev
Polarity on the
DC input side is
reserved.
Major
Check whether the polarity on the DC of
the module is correct.
Hardwa-
re-flt
Interior
hardware of the
module is faulty.
Major
Measure the DC voltage of the inverter,
to check whether short circuit occurs
inside the inverter.
lac-high
AC current of
the inverter is
excessively high.
Major
1. Check whether the AC and DC
cables of the inverter are firmly in place.
2. Check the insulation of the cables for
intactness.
3. Check whether the wiring terminals
are short-circuited to ground.
Overloa-
d-pro
Output overload
occurs.
Major
Refer to the measures for "lac-high".
I
leakage-
pro
The sampling
value of the AC
leakage currents
exceeds the
protective
threshold.
Major
1. Check whether the AC cables are
damaged.
2. If the LV side of the transformer is
connected in the Y type, ensure that the
neutral point is unconnected.
PM-high
The temperature
of modules
inside the
module room is
excessively high.
Major
1. Check the air inlets.
2. Check whether the air outlets of the
inverter are obstructed by foreign
materials. Replace the filters when
necessary.
3. Check whether the fans function
normally during the operation of the
inverter.
Fan1-flt/
Fan2-flt
Fan 1 or fan 2
inside the
inverter is faulty.
Major
1. Check whether the grid voltage is
normal. Measure the grid voltage with a
multimeter, and check whether phase
loss occurs.
2. Check whether the fans are normally
supplied with power. Measure the
three-phase power source with a
multimeter to ensure the nominal input
voltage is 400 Vac.
System Manual
