SMA SC 500CP XT - Manual (Page 73)

Error no. Explanation Inverter behavior Corrective measures
S1 S2 R
6441 Sensor error during measurement
of DC voltage 30 s 30 s ‒ • Contact SMA Service Line.
6443 Unspecified error in digital signal
processor 30 s ‒ x • Contact SMA Service Line.
6447 Self-test of inverter bridge failed Q Q ‒ • Contact SMA Service Line.
6448 Insulation monitoring provides non-
permitted values W W ‒ • Check insulation monitoring.
6451 Measured AC voltage of the in-
verter is less than utility grid volt-
age. W W ‒ • Contact SMA Service Line.
6452 Measured AC voltage of the utility
grid is less than inverter voltage. W W ‒ • Contact SMA Service Line.
6453 AC voltage of grid limit monitoring
is faulty. W W ‒ • Contact SMA Service Line.
6454 AC current is faulty. W W ‒ • Contact SMA Service Line.
6455 AC voltage is faulty. W W ‒ • Contact SMA Service Line.
6456 Pre-charging circuit of DC link is
defective. W W ‒ • Contact SMA Service Line.
6457 Capacitor self-test has failed. Q Q ‒ • Contact SMA Service Line.
6461 Insulation monitoring device has
not adopted threshold. 15
min 15
min x • Check the insulation monitoring device
and cabling.
6471 Online capacitor self-test has
failed. Q Q x • Contact SMA Service Line.
6472 Endless loop between online and
offline capacitor test Q Q x • Contact SMA Service Line.
6501 Interior temperature of inverter is
too high. 30 s 1 min ‒ • Check function of the fans.
• Clean the fans.
• Clean clogged fan inlets and ventilation
plates.
6502 Temperature of inverter bridge is
too high. 30 s 1 min ‒
6508 Outside temperature is too high. 30 s 1 min ‒
6605 The fast stop was tripped due
overtemperature in the switch cabi-
net. 30 s 1 min ‒ • Contact SMA Service Line.
7 Troubleshooting SMA Solar Technology AG
User Manual 73 SCCPXT-BA-E4-en-54