Troubleshooting – Fronius DC Box 60/12 User Manual
Page 45
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EN-US
Power drop in inverter
Cause:
One or more fuses are defective
Remedy:
Replace faulty fuses
Fuse faulty
Cause:
Over-temperature in the Fronius DC Box 60/12 (e.g.,
due to direct sunlight)
Remedy:
Find a different installation position for the Fronius DC
Box 60/12, if required (possibly under the solar modu-
les), replace defective fuse
Cause:
Solar module string faulty
Remedy:
Remedy fault in solar module string, replace the faulty
fuse
Cause:
A fuse was used with a nominal current rating that
was too low (nominal current rating of fuse less than
the max. short circuit current of the solar module)
Remedy:
Replace faulty fuse and use a fuse with the correct
nominal current rating
Cause:
Solar module strings connected with reversed polarity
Remedy:
Check the polarity of each individual solar module
string and correct any solar module string that is not
connected correctly
No solar module voltage at inverter
Cause:
Connection error
Remedy:
Check the DC cable ‘OUT’ for damage,
check the connections (terminals)
Cause:
DC cable ‘OUT’ polarity reversed
Remedy:
Connect the DC cable ‘OUT’ to the Fronius DC Box
60/12 with the correct polarity
WARNING! Operating the equipment incorrectly can cause
serious injury and damage. The following activities must only be
carried out by trained and qualified personnel. Follow the safety
rules in these operating instructions.
Troubleshooting
Safety
Troubleshoo-
ting