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SMA Solar Technology AG
Event no. Message
7508
External fan fault
Replace fan
Troubleshooting
Cause and corrective measures
The fan is clogged or defective. The inverter may reduce its
power output due to overheating. The inverter continues feeding
into the electricity grid.
Corrective measures:
• Clean the fan
7701 ...
7703
8001
• Replace the fan
Self diagnosis
Internal device fault. The inverter disconnects from the electricity
Interference device grid.
Corrective measures:
• Contact the SMA Service Line (see Section 15 "Contact"
(page 91)).
Derating occurred The power supplied by the inverter has been reduced to below
nominal power for more than 10 minutes due to overheating.
Corrective measures:
If this event occurs frequently:
• Ensure sufficient ventilation.
8101 ...
8104
Comm. disturbed
• Check the heat dissipation (see Section 9.2 "Checking
Heat Dissipation" (page 61)).
A fault has occurred in the internal communication of the
inverter. The inverter continues feeding into the electricity grid.
Corrective measures:
8801 ...
8803
No display
• Contact the SMA Service Line (see Section 15 "Contact"
(page 91)).
The display is blank. The inverter continues feeding into the
electricity grid. This error can have the following causes:
• The ambient temperature is so low that the display
disconnects to protect itself.
• The inverter cannot identify the display type.
• No display is connected or the connection is defective.
Corrective measures:
• Wait until the temperature has risen above ‒25°C.
9002
Inst. code invalid
• Contact the SMA Service Line (see Section 15 "Contact"
(page 91)).
The SMA Grid Guard code entered (personal installer
password) is not valid.
Corrective measures:
• Enter a valid SMA Grid Guard code.
Installation Manual
SB25-30TLST-21-IA-en-12
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