SMA SMC 7000HV Installation - Manual (Page 73)

SMA Solar Technology AG Troubleshooting
Installation Manual SMC70HV11-IA-IEN112970 73
9.3 Red LED is Glowing Continuously
If the red status display LED lights up continuously during operation, there is a ground fault in the
PV array or at minimum one varistor for overvoltage protection is faulty.
Procedure
1. Check for ground faults in the PV array as described in section 9.3.1 "Checking the PV Array
for Ground Faults" (page 74).
2. If the red LED continues to glow, check the varistors as described in section 9.3.2 "Checking the
Function of the Varistors" (page 76).