Must PH50-10000T, Manual

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Error message Description Suggestion
NO Utility
No utility grid connected or utility
grid power failure.
1.Check AC wiring, especially the
ground wire
2.Contact the installation contractor
or supplier
Inverter
temperature fault
NTC error
1.Restart inverter.
2.If error message still exists, contact
the installation contractor or supplier.
PV High fault
The DC input voltage is exceeding
the Maximum tolerable value.
1.Disconnect the DC switch
immediately.
Grid voltage
fault
Utility grid voltage is out of
permissible range.
1.Check grid voltage.
2.If the error message still exists
despite the grid voltage being within
the tolerable range, contact the
installation contractor or supplier.
Grid frequency
fault
Utility grid Frequency out of
permissible range.
1.Check grid frequency.
2.If the error message is displayed
despite the grid frequency being
within the tolerable range, contact
the installation contractor or supplier.
PV ISO fault Insulation problem
1.Check if panel enclosure ground
properly.
2.Check if inverter ground properly.
3.Check if the DC breaker gets wet.
4.If the error message is displayed
despite the above checking passed,
contact the installation contractor
or supplier.
DCI High Output current DC offset too high
1.Restart inverter.
If error message still exists, contact
the installation contractor or supplier.
GFCI damage GFCI Device Damage
1.Restart inverter.
2.If error message still exists, contact
the
installation contractor or supplier.
Hall sensor fault HCT fault
1.Restart inverter.
2.If error message still exists, contact
the installation contractor or supplier.
Rely fault Rely error
1.Restart inverter.
2.If error message still exists, contact
the installation contractor or supplier.
Communication
fault
CPU communication fault
1.Restart inverter.
2.If error message still exists, contact
the installation contractor or supplier.
Soft FW fault
PE fault
Soft FW Don't match
1.Restart inverter.
2.If error message still exists, contact
the installation contractor or supplier.
1.check PE
If error message still exists, contact
theinstallation contractor or supplier.
No grounding wire or poor contact.
Note: If the suggestions do not work, please connect to the installation contractor or supplier.