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551
Solar module grounding fuse defective
Inverter feeds in 500 h, then the inverter discontinues feed-in mode to protect the solar
modules
Cause:
Solar module grounding fuse is defective
Remedy:
Check solar module grounding fuse and, if necessary, replace it
Cause:
Insulation measurement error in power stage set
Remedy:
Replace power stage set
552
Derating due to AC voltage
Cause:
Grid voltage error
Remedy:
Check grid voltage
Cause:
AC measurement in the power stage set defective
Remedy:
Replace power stage set
553
Communication error with phase master
Cause:
Communication error with one of the phase masters
Remedy:
Remedied automatically
Cause:
Grid voltage error
Remedy:
Check grid voltage
Cause:
Faulty cable connection to power stage set
Remedy:
Check cable connection
Cause:
Measurement error in power stage set
Remedy:
Replace power stage set
Cause:
Communication error with power stage set
Remedy:
Check ribbon cable or IG BRAIN and, if necessary, replace them
555
Axial fan defective
Cause:
Axial fan not connected
Remedy:
Check fan cable
Cause:
Fan defective
Remedy:
Replace fan
Cause:
Measurement connection to power stage set defective
Remedy:
Replace power stage set
97
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