SMA SUNNY CENTRAL - Manual (Page 47)

SMA Solar Technology AG Failures and Warnings
User Manual SC-BEN092751 47
9.1.3 Warnings
No. Description
281 Error text:
Ground fault or SPD defect
Error type 1
Cause:
The alert chain is interrupted (refer to the wiring diagram).
• Overvoltage protector damaged.
• Back-up fuse(s) damaged on the grid side or generator side (if present).
• The solar power system's insulation resistance is lower than the set threshold value.
• The transformer's biasing circuit breaker has tripped.
Corrective measures:
• Check fault signaling of the overvoltage protectors, and replace protector if
necessary.
• Check the back-up fuse(s) of the overvoltage protector and replace it / them if
necessary.
• Check the resistance of the solar power system.
• In the event of an insulation fault, check strings under load-free conditions. Separate
and connect individual strings to determine which string is faulty.
• Check the function of the ground fault monitor.
• Switch biasing circuit breaker of the transformer back on.
283 Error text:
cabinet Temp.
Error type 1
Cause:
The threshold value (parameter TMin or TMax) for the permissible cabinet temperature has
been breached (too high or too low).
Corrective measures:
• Check function of cabinet cooling fans.
• Clean or replace dirty air filters.
• Check ambient temperature, and adjust if necessary.