Delta M50A-260 - Error

9.1 Error
Error num-
ber
Description Suggestions for resolution
E01
Mains frequency lies above the OFR setting (overfre-
quency detection).
Check the mains frequency.
Incorrect country or grid type setting. Check the country and grid type settings.
E02
Mains frequency lies below the UFR setting (underfre-
quency detection).
Check the mains frequency.
Incorrect country or grid type setting. Check the country and grid type settings.
E07 Non-linear load in the grid and in the vicinity of the inverter.
The grid connection of the inverter must be kept away from
non-linear loads; if necessary, move it further away.
If this error occurs repeatedly, contact Delta Customer
Service.
E08 AC cable is not connected correctly. Check the AC cable connection.
E09
There is normally an external load isolating switch between
the inverter and the mains (e.g. in an equipment terminal
box). This is used to isolate the inverter from the mains
and to shut o󰀨 its AC voltage supply.
Check that the external load isolating switch is closed.
AC cable is not connected correctly. Check the AC cable connection.
E10, E15,
E20
Grid voltage lies below the UVR setting (undervoltage
detection).
Check the grid voltage connection at the inverter terminals.
Incorrect country or grid type setting. Check the country and grid type settings.
AC cable is not connected correctly. Check that the AC cable is connected correctly.
E11, E13,
E16, E18,
E21, E23
Mains voltage lies above the OVR setting (overvoltage
detection).
Check the mains voltage.
Supply voltage during operation is greater than the OVR
 setting.
Check the mains voltage.
Incorrect country or grid type setting. Check the country and grid type settings.
E30 The DC input voltage is too high.
Design the module strings so that the DC input voltage is
below the maximum permissible DC input voltage.
E34
Insulation fault in the PV system. Check the insulation of the DC inputs.
Large PV system capacitance between Plus and Ground
or Minus and Ground or both.
Check the capacity. Dry the PV modules if necessary.
87
9 Error events and troubleshooting
Error
Installation and Operation Manual M50A_260 RPI503M260000 Product version L and M EU V1.3 EN 2023-08-14