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Page
52
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
OverTemp E014
High internal temperature recorded by the
inverter. This parameter depends in part on
the power that the inverter must supply, as
the internal inverter temperature is affected
by the heat dissipated internally by its
components. This may be caused by:
a) Failure to observe the installation
conditions
b) Internal inverter fault a) Verify the installation conditions
(exposure to sunlight) and check that air
flow to the MICRO inverter is not
obstructed, so as to permit cooling of the
device. Check that the ambient temperature
measured around the MICRO inverter does
not exceed the limits set in the technical
data.
b) Verify the MICRO inverter temperature
readings (see the Internal Web Server
section in the CDD manual). If one of the
temperatures remains at a value which is
not compatible with the environmental con-
ditions (e.g. -40°C internal temp. reading
with 20°C effective ambient temperature),
the alarm may be due to internal inverter
causes.
Ground
fault E018
The error is generated when a ground
leakage current is detected in the DC
section of the system. This may be caused
by:
a) PV module ground leakage
b) Internal inverter fault See the “Verification of ground leakage” and
“Measuring the insulation resistance”
sections for information on how to perform
checks and measurements.
a) If the measured insulation resistance
value is less tha
n 1KΩ, the PV module has
a ground leakage that prevents the grid
connection of the inverter. In this case the
PV module must be replaced.
b) If the measured value exceeds 1KΩ, try
connecting the MICRO inverter to a different
PV module. If the error persists, the alarm
may be caused by internal inverter faults.
To perform this test, the MICRO inverter
Ground Fault condition must be reset via
the Web Server.
DC
Injection E023
The error is generated if the DC component
of the current supplied to the grid exceeds
the threshold set by the country of
installation’s applicable regulation. In any
case, the inverter will automatically try to
reconnect to the grid. This may be caused
by:
a) Sporadic recurrence of this error is a
sign of large grid distortions or sudden
changes in irradiance.
b) Systematic recurrence of this error may
be due to an inverter fault. a) Verify the grid parameters and, if the grid
voltage is strongly distorted, please contact
your grid operator to address the problem
If the grid voltage is stable, the error may
also be due to sudden irradiance variations.
In this case, the inverter will automatically
try to reconnect to the grid and no actions
are required to solve the problem.
b) If the grid voltage is stable, yet the error
systematically persists, the malfunction may
be caused by an internal inverter fault