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
L00410353-02
11
3
