U d is k over-current
protection
1 .Unplug the U disk
2.Re-access U disk after shutdown
3.If the error message still exists, contact
manufacturer.
1 .After shutdown,Check fuse.
2. If e r r o r m e s s a g e s ti l l e x i s t s , con ta ct
manufacturer.
The DC input voltage is
e x c e e d i n g t h e
m ax im u m to le rab le
value.
1 .Immediately disconnect the DC switch and check
the voltage
2.If the fault code still exists after the normal voltage
is restored, contact manufacturer.
1 .Check PV input terminals
2. If e r r o r m e s s a g e s ti l l e x i s t s , c o n t a ct
manufacturer.
1 .Please confirm grid is lost or not.
2. If e r r o r m e s s a g e s ti l l e x i s t s , con ta ct
manufacturer.
1 .Check the AC voltage is in the range of standard
voltage in specification.
2. If e r r o r m e s s a g e s ti l l e x i s t s , c o n t a ct
manufacturer.
1 .Check the frequency is in the range of specification
or not.
2. If e r r o r m e s s a g e s ti l l e x i s t s , co n t a ct
manufacturer.
1 .Please reduce the load of EPS output.
2. If e r r o r m e s s a g e s ti l l e x i s t s , con ta ct
manufacturer.
1 .Check if AC current sensor is connected well 2 . I f
e rro r me s sa g e s t i l l exi st s, c o n t a ct manu-
facturer.
CT line reversed or
Ground fail
1.Check the L line and N line of SP-CT is reversed or
not.
2. If e r r o r m e s s a g e s ti l l e x i s t s , c o n t a ct
manufacturer.
Communication fault M3
didn't receive SP-CT
data
1 .Check communication wire
2. If e r r o r m e s s a g e s ti l l e x i s t s , con ta ct
manufacturer.
1 .Check communication wire.
2. If e r r o r m e s s a g e s ti l l e x i s t s , c o n t a ct
manufacturer.
1 .After shutdown,Check the fan connection.
2. replace the fan.
3.If the error message still exists, contact manufac-
turer.
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