50 REFUsol 40K / 46K-MV REFU Elektronik GmbH
Error
Code
Text Description Action
90051 DC condition DC switch on condition not fulfilled Wait until the solar voltage is high
enough
90052 User lock active The inverter can't connect to the grid,
as the User-lock has been set.
Deactivate user lock
90053 Communication
SR
Internal communication problems Fault is independently resolved
after a few minutes. If not, switch
device off and on again. If this does
not resolve the problem, contact
Service.
90054 Overvoltage 2 The phase voltage has exceeded the
limit value of the voltage average
monitor for too long.
As long as the inverter is detecting
the voltage error: monitor line
voltages (analyse grid). If you
consider the line voltages to be in
order, contact Service.
90055 Grid overvoltage Line-to-line overvoltage (AC)
detected
90056 Grid
undervoltage
Line-to-line undervoltage (AC)
detected
90057 Watchdog C0 Internal protection function is
triggered.
Contact Service.
90058 Watchdog C1
90059 LT Firmware The software of the power section is
defective.
90060 FRT stability Stability issue with the DC link
detected.
Please contact the service if it
happens repeatedly
90061 Update fault This notification can be ignored.
No measures necessary.
90062 Fault ride
through
Grid-instability which is handled with
respect to the grid code standards.
A0013 PM isolation
RCD SR
The measured value of the residual
currents are over the limits:
Measured value >150 mA -> Trip
within 20 ms
Measured value >60 mA -> Trip
within 130 ms
Measured value >30 mA -> Trip
within 280 ms
Check system isolation. If you
consider the system isolation to be
in order, contact Service.
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