85
Fault
name
Explanation
Fault
severity
Measures
PV pol-
rev
Polarity on the
DC input side is
reserved.
Major
Check whether the polarity on the DC of
the module is correct.
Hardwar-
e-flt
Interior hardware
of the module is
faulty.
Major
Measure the DC voltage of the MV
Station, to check whether short circuit
occurs inside the MV Station.
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 MV
Station are obstructed by foreign
materials. Replace the filters when
necessary.
3. Check whether the fans function
normally during the operation of the MV
Station.
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
