48 REFUsol 40K / 46K-MV REFU Elektronik GmbH
7.5
List of Error Messages
Note
Under certain weather conditions, condensation may form in the display. This
is normal and causes no malfunction of the inverter.
Error
Code
Text Description Action
90006 Grid overvoltage Phase overvoltage (AC) has been
detected.
Check the phase voltages (with a
true RMS measurement device). If
you consider the phase voltages to
be in order, contact Service.
90007 Grid
undervoltage
Phase undervoltage (AC) has been
detected.
90008 Overfrequency The grid frequency has exceeded the
limit value.
As long as the inverter is detecting
an over or under-frequency: check
the frequency of the phases. If you
consider the frequencies to be in
order, contact Service
90009 Underfrequency The grid frequency has dropped
below the limit value.
9000A DC link 3 DC-voltage measurement error.
Wait for the measuremets to
become stable again. If this takes
more than 2-3h, please contact
Service.
9000B DC link 1 Imbalance low: Difference between
the DC link voltages is too high.
9000C DC link 2 Imbalance high: Difference between
the two boosted DC link voltages is
too high
9000D DC link 4 The boosted DC-voltage has dropped
below the mains peak value
90010 DC link 5 The boosted DC link voltage is too
high.
90011 DC link 6 The DC link voltage is too high.
90017 Communication
LT
Communication malfunction between
power section and control and
regulation unit
The inverter will acknowledge the
error automatically. If problem
occurs repeatedly, contact Service
90018 Grid frequency
LT
Power section has detected
under/overfrequency
As long as the inverter is detecting
a power section grid frequency:
check the frequency of the phases.
If you consider the frequencies to
be in order, contact the Service
90019 Grid overvoltage
LT
The power section has detected a
phase overvoltage.
As long as the inverter is detecting
a grid overvoltage or under voltage:
check line voltages (with a true
RMS measurement device). If you
9001A Grid
undervoltage LT
The power section has detected a
phase undervoltage.
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