SMA SUNNY CENTRAL 500CP XT Maintenance Manual page 38

5 Troubleshooting
Error no. Explanation
6441 Sensor error during measurement
of DC voltage
6443 Unspecified error in digital signal
processor
6447 Self-test of inverter bridge failed
6448 Insulation monitoring provides non-
permitted values
6451 Measured AC voltage of the in-
verter is less than utility grid volt-
age.
6452 Measured AC voltage of the utility
grid is less than inverter voltage.
6453 AC voltage of grid limit monitoring
is faulty.
6454 AC current is faulty.
6455 AC voltage is faulty.
6456 Pre-charging circuit of DC link is
defective.
6457 Capacitor self-test has failed.
6461 Insulation monitoring device has
not adopted threshold.
6471 Online capacitor self-test has
failed.
6472 Endless loop between online and
offline capacitor test
6486 Inadmissible deviations between
AC power and DC power has
been detected.
6487 AC ground fault has been de-
tected.
6501 Interior temperature of inverter is
too high.
6502 Temperature of inverter bridge is
too high.
6508 Outside temperature is too high.
6512 Minimum operating temperature
not reached
38 SCCPXT-E7-WA-en-37
Inverter behavior Corrective measures
S1 S2 R
30 s 30 s ‒ • Contact the SMA Service Line.
30 s ‒ x • Contact the SMA Service Line.
Q Q ‒ • Contact the SMA Service Line.
W W ‒ • Check insulation monitoring.
W W ‒ • Contact the SMA Service Line.
W W ‒ • Contact the SMA Service Line.
W W ‒ • Contact the SMA Service Line.
W W ‒ • Contact the SMA Service Line.
W W ‒ • Contact the SMA Service Line.
W W ‒ • Contact the SMA Service Line.
Q Q ‒ • Contact the SMA Service Line.
15 15 x • Check the insulation monitoring device
min min
Q Q ‒ • Contact the SMA Service Line.
Q Q ‒ • Contact the SMA Service Line.
W W ‒ ‒
Q Q ‒ • Check the overvoltage protection.
• Contact the SMA Service Line.
30 s 1 min ‒ • Check function of the fans.
• Clean the fans.
30 s 1 min ‒ • Clean clogged fan inlets and ventilation
30 s 1 min ‒
W W ‒ ‒
SMA Solar Technology AG
and cabling.
plates.
Maintenance Manual