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Page
53
of
76 MICRO-0.25/0.3-I-OUTD-US-208-240 BCG.00612_AB
Part
5 Troubleshooting Guide
Alarm
Messages
Code
displayed
Cause Solution
Internal
Error E024
a) The alarm may occur during inverter ini-
tialization and is caused by the initialization
of communication between the CDD and
the MICRO inverters.
b) Systematic occurrence of this error may
be due to an inverter fault. a) The alarm will automatically reset upon
connection of the inverter to the grid, and no
actions are required to solve the problem.
b) If the error systematically persists, the
malfunction may be caused by an internal
inverter fault
Country
Mismatch E050
The alarm is generated when the grid
standard (selected on the CDD during
installation) has not been correctly set on
the MICRO inverters. This may be caused
by:
a) communication problems while setting
the grid standard for the MICRO inverter
from the CDD:
b) poor irradiance while setting the grid
standard for the MICRO inverter from the
CDD:
MICRO inverters are directly
supplied by the voltage generated at the
panel, and poor irradiance may cause
inverter shut downs
a) Verify on the Internal Web Server (as
described in the CDD manual), the radio
communication quality on each MICRO
inverter (values above 60% indicate good
reception). If the quality of the received
signal is good re-configure the installation,
otherwise consider installing the CDD
device in a different position to ensure
better radio signal quality.
b) System configuration must be carried out
in good irradiance conditions, in order to
guarantee the correct operation of the
MICRO inverter and to prevent the risk of
shut-downs due to insufficient input voltage
generated by the PV module.
Country
Not Comp E051
The set grid standard is not compatible with
the firmware installed on the MICRO
inverter. This condition may be generated if
a MICRO inverter is replaced. The firmware in the MICRO inverter/s in the
installation must be updated to a compatible
version. Firmware updates are performed
via the Internal Web Server (see the CDD
manual), with the software package
obtained from Power-One Service
Vpanel
Problem W001
This alarm is displayed when the input
voltage generated at the PV generator is
outside the allowed range given in the
technical data. This may be caused by:
a) Poor irradiance
b) Possible shadows that may darken the
module during part of the day.
b) PV module incompatible with the MICRO
inverter input parameters
d) Internal inverter fault a) Wait for appropriate irradiance to
guarantee correct operation of the inverter
b) Verify that no shadows are present on
the PV module when the error is generated
c) Verify that the PV module voltage
characteristics are compatible with the
inverter input specifications.
d) If the above checks have yielded positive
results, yet the error persists, the
malfunction may be caused by the MICRO
inverter.
Grid Fail W003
This alarm is generated when one or more
grid parameters lie outside the permitted
range set by the country of installation’s
grid standard. The error code will be
followed by a suffix in brackets indicating
the grid parameter out of range:
(UV) Grid voltage below the set lower limit
(OV) Grid voltage above the set upper limit
(UF) Grid frequency below the set lower
limit
(OF) Grid frequency above the set upper
limit If the error is generated only on one of the
installation MICRO inverters, this may be
due to an inverter fault.
If the alarm is generated at multiple
inverters in the installation, check the grid
voltage for instabilities in any of the 4
parameters monitored by the inverter. If
anomalous values are detected, verify the
sizing of the AC line conductors. In case of
correct sizing, please contact your grid
operator to address the problem.