Event text Description Fault
origin
Action in the event of a permanent fail-
ure
U 3.3 Internal power supply outside limits Inverter Service inverter
U 5.0 Internal power supply outside limits Inverter Service inverter
U 15.0 Internal power supply outside limits Inverter Service inverter
U PV Input voltage from PV string too high PV system Request technical service from PV system
supplier
U-SNUBBER Snubber voltage too high Inverter Service inverter
U DC-BUS DC bus voltage too high Inverter Service inverter
U-GRID AC grid voltage outside the threshold
values (higher or lower than setting)
AC grid In case of repeated occurrence: Request
technical service from utility
F-GRID Grid frequency outside limits (outside
settings)
AC grid In case of repeated occurrence: Request
technical service from utility
IPM CURRENT The DC content in the AC current is too
high
Inverter Service inverter
ENS ENS error AC grid In case of repeated occurrence: Request
technical service from utility
ENS RAM ENS memory error Inverter Service inverter
ENS FL. CHKSM Flash memory error after self-test Inverter Service inverter
ENS EP. CHKSM EPROM memory error after self-test Inverter Service inverter
HW TRIP Hardware trip – current too high Inverter Service inverter
TEMP HIGH Temperature in integrated power mod-
ule too high
Environ-
ment
Check whether inverter is covered.
Check inverter for free air flow through heat
sink. Clean heat sink.
Check that ambient temperature is within
limits.
EPRM PAR. LIM Validity check of grid voltage and fre-
quency settings. Settings too far away
from actual grid voltage and frequency
values.
Inverter Request service to check inverter settings
ENS COM ERR Error in communication with ENS board Inverter Service inverter
ENS impedance Grid impedance step higher than limit AC grid In case of repeated occurrence: Request
technical service from utility
PV—CONFIG—ERR Error detected by PV configuration test PV system Check the cabling of the PV panels. Two DC
inputs are wired in parallel string configura-
tion, one is not
Not recorded in the event log - red LED does not flash
Event text Description Fault
origin
Action in the event of a permanent fail-
ure
EARTHFAULT Current event shown in grid mode PV system Earth fault, check PV system for earthing to
avoid damage to PV panels. Request techni-
cal service from the PV system supplier or in-
staller.
Table 3.1: Inverter Event Log
A “permanent failure” is defined by an event having been present for more than 15 minutes.
3. Troubleshooting
L00410362-05_2q 11
3
To Next Page
Loading...
Need help?
General