Fronius CL - Page 99

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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