Error Messages and Troubleshooting
55
Main Menu (v2.6)
REFUsol 50K-3T
982081 | 03 | 2021-03
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ID25 BusUVP
DC bus voltage is
too low.
If the PV system configuration is correct (no ID05 error), the possible cause is insuf
-
ficient solar irradiation. The inverter automatically returns to normal operating sta
-
tus after the solar irradiation returns to a normal level.
ID26 BusOVP
DC bus voltage is
too high.
ID26-ID27 are internal faults of the inverter, switch off the DC switch, wait 5 minutes
and switch on the DC switch again.
Check the DC voltages on both MPPT inputs and on the display. If no troubleshooting
is possible, contact REFU Service.
ID27 VbusUnbal
-
ance
DC bus voltage is
unbalanced.
ID28 DciOCP
DC current is too
high.
Check if the MPPT mode (parallel or independent) is set correctly according to the PV
system configuration, change if necessary.
When the correct MPPT mode is set, switch off the DC switch, wait 5 minutes and
switch on the DC switch again. If no troubleshooting is possible, contact REFU Service
.
ID29 SwOCPIn
-
stant
AC current is too
high.
Internal error of the inverter. Switch off the DC switch, wait 5 minutes and switch the
DC switch on again. If no troubleshooting is possible, contact REFU Service.
Tab. 8:
Event list
with error and information messages
ID
Event name Event description Measure