Battery undertemperature message

This signature is an inverter or battery inverter event that reports the battery is too cold. On Sunny Island units it shows up as warning W211, a level 1 low battery temperature warning. When an external battery management system reports the condition over SiCom, it shows up as warnings W940 and W942 at level 1 or as errors F924 and F926 at level 3. The 942 and 926 codes refer to the charge mode. Other SMA inverters log this condition as event 9314, battery undertemperature. For that event the cause has to be found by Service, and the battery manufacturer should be contacted. First check that the battery room is warm enough. If the error comes from the external battery management, clear the cause using the battery manufacturer's documentation.

<!-- review notes

• sentence 4: support check: partial - Event 9314 with Service-determined cause and contacting battery manufacturer is stated, but 'other SMA inverters' is not named in the passages.
• sentence 4: review: partial - The text of event 9314 (cause found by Service, contact the battery manufacturer) is stated, but the passages do not say which devices log it, so 'other SMA inverters' is not shown. -->