12 Event messages
SMA Solar Technology AG
Operating manual STP110-60-BE-en-16 77
12.2.23 Event 037 (Sunny Portal: 6501)
Event message:
• Communication impaired
Explanation:
Error in the communication processor, the inverter continues feeding in, however. The cause must be
determined by the Service.
Corrective measures:
• If this message is displayed frequently, contact the Service.
12.2.24 Event 038 (Sunny Portal: 7703)
Event message:
• Interference device
Corrective measures:
• Wait until the inverter is in normal mode again.
• Switch off the AC miniature circuit breakers and the DC load-break switches and switch them
on again after 15minutes to restart the inverter.
• If the fault cannot be rectified using the indicated corrective measures, contact Service.
12.2.25 Event 039 (Sunny Portal: 3501)
Event message:
• Low system insulation resistance
Explanation:
Generally, the fault is caused by poor insulation of the module/cable to ground or by rainfall and a
moist environment.
Corrective measures:
• Check whether the ISO insulation conservation value is excessively high and ensure it complies
with the local requirements.
• Check the resistance of the DC string or DC cable to ground. Rectify the fault if a short circuit
or a damaged insulating layer is present.
• If the cable shows no abnormalities and the fault occurs on rainy days, check again when the
weather is good.
• If the fault cannot be rectified using the indicated corrective measures, contact Service.
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