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Page
51
of
76 MICRO-0.25/0.3-I-OUTD-US-208-240 BCG.00612_AB
Part
5 Troubleshooting Guide
5.1 ALARM MESSAGES GENERATED BY THE MICRO INVERTER
The equipment is capable of communicating errors/warnings via radio to the associated CDD
device. Any messages received and related codes can be checked on the display for the CDD device.
To understand and address warning (Wxxx) or error (Exxx) messages generated by the MICRO
inverters, in the installation and displayed on the CDD display, refer to the table shown below.
Table 5-1: Alarm messages and error codes displayed on CDD
Alarm
Messages
Code
displayed
Cause Solution
Input OC E001
The error appears when the inverter input
current exceeds the set overcurrent
threshold. This may be caused by:
a) sudden irradiance changes that may
generate input current surges into the
MICRO inverter
b) PV module incompatible with the MICRO
inverter input characteristics
c) Faulty MICRO inverter a) The error occurs sporadically and no
action is required as the MICRO inverter will
automatically reset to normal operation
b) It is necessary to verify that the
photovoltaic module specifications are
compatible with the inverter.
c) If conditions a) and b) have been verified
and the error persists, the malfunction may
be caused by an internal inverter fault
Vbulk OV E004
The error is generated when the voltage at
the ends of the bulk capacitors exceeds the
Over Voltage threshold. This may be
caused by:
a) Grid voltage too high
b) Internal inverter fault a) Check that the grid voltage is compatible
with the MICRO inverter specifications. In
the event of highly abnormal grid voltage,
please contact your grid operator to address
the problem.
b) If no problems are found when checking
the grid voltage, the alarm may be caused
by internal inverter faults.
Output OC E006
The error appears when the inverter output
current exceeds the internal inverter alarm
threshold.
This may be caused by:
a) High impedance grid with significant
voltage variations, even with small loads.
b) Internal inverter fault a) Check that the grid voltage is stable,
mainly upon:
- loading with high current peak loads.
- maximum power generation of the PV
system
If the grid voltage is unstable, verify the
appropriate sizing of the line cable/s, and, if
correct, please contact your grid operator to
address the problem.
b) If no problems are found when checking
the grid voltage, the alarm may be caused
by internal inverter faults