Delta M70A User Manual

99
Installation and Operation Manual for Solar Power Inverter M70A EU V1.1 EN 2020-02-20
9 Error events and troubleshooting
Error
9.1 Error
Error num-
ber
Message Possible causes Suggestions for resolution
E01
AC Freq High
Grid frequency lies above the OFR setting
(overfrequency relay).
Check the grid frequency.
Incorrect country or grid type setting. Check the country and grid type settings.
E02
AC Freq Low
Grid frequency lies below the UFR setting
(underfrequency relay).
Check the grid frequency.
Incorrect country or grid type setting. Check the country and grid type settings.
E07
Grid Quality
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
HW Connect Fail
AC cable is not connected correctly. Check that the AC cable is connected correctly.
E09
No Grid
There is normally an external load isolating
switch between the inverter and the grid (e.g.
in an equipment terminal box). This is used to
isolate the inverter from the grid and to shut o󰀨
its AC voltage supply.
Check that the external load isolating switch is
closed.
AC cable is not connected correctly. Check that the AC cable is connected correctly.
E10, E15,
E20
AC Volt Low
Grid voltage lies below the UVR setting (under-
voltage relay).
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
AC Volt High
Grid frequency lies above the OVR setting
(overvoltage relay).
Check the grid voltage.
Supply voltage during operation is greater than
the OVR long setting.
Check the grid voltage.
Incorrect country or grid type setting. Check the country and grid type settings.
E30
Solar High
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
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 capacitance. Dry the PV modules if
necessary.

Delta M70A Specifications

General

Brand	Delta
Model	M70A
Category	Inverter
Language	English