52
REFUsol 48K-UL
REFU Elektronik GmbH
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 LT 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
consider the line voltages to be in
order, contact the Service.
9001A
Grid
undervoltage LT
The power section has detected a
phase undervoltage.
9001B RCD fault
The AFI-Board unit has detected a
residual current.
Leads to an immediately shutdown
Check system isolation. As long as
you consider the isolation
impedance to be in order, contact
Service.
9001D RCD warning