Technical data
Internal
Events caused by the inverter
ID Display Description Action DNO Hotline PV
201–208 Too high
tempera-
ture / wait-
ing
The internal temperature of the
inverter is too high
Check whether the air-
flow to the heat sink is
blocked
- x -
209, 210 The intermediate voltages inside
the inverter are too high
Check the maximum
PV voltage using the
display to see if it is
above the limits
- x -
211 No tacho signal from fan Check the eventlog, if
the majority of entries
are of type 211, call
the inverter hotline
- x -
212 The intermediate voltages inside
the inverter are out of balance
Check the DC bus val-
ues and call the inver-
ter hotline
- x -
216–218 The grid current is too high - - x -
223, 255-257 Islanding protection trip Check grid is available - x -
224 A wire is broken in the RCMU - - x -
225–240 Internal memory error - - x -
241, 242,
249
Internal communication error - - x -
243, 244 Internal error - - x -
247 A plausibility test in the functional
safety processor has failed
- - x -
251 The functional safety processor
has reported Fail safe
- - x -
213–215 Plausibility error between internal
measurements
- - x -
222 Autotest conducted (only applica-
ble in Italy)
No action required - - -
Table 11.4: Internal Events
Fail Safe
Events caused by the self-test
ID Description Action DNO Hotline PV
350-352 RCMU self-test failed - - x -
353-355 Current sensor test failed Ensure correct polarity on PV arrays - x -
356-363 Transistor & relay test failed - - x -
364 Potential error in the AC installa-
tion
Verify that the AC installation is correct ac-
cording to the installation manual. Verify
that the Neutral wire is connected.
- x -
Table 11.5: Events Caused by the Self-test
11.2.
Maintenance
Normally, the inverter needs no maintenance or calibration.
Ensure the heatsink at the rear of the inverter is not covered.
Clean the contacts of the PV load switch once per year. Perform cleaning by cycling the switch
to on and off positions ten times.The PV load switch is located at the base of the inverter.
11.2.1. Cleaning the Cabinet
Clean the inverter cabinet using pressurised air, a soft cloth or a brush.
11. Service and Repair
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