Heat sink

The heat sink is the metal cooling body inside an inverter or battery inverter. It carries heat away from the power electronics. Its temperature is measured and shown in degrees Celsius. On Sunny Island units it is shown for the device, and in a cluster the master displays it. Readings are also given for each connected Sunny Island Charger. Larger central inverters can have several heat sink temperature points, each logged as its own measurement. The main failure tied to this part is heat sink overtemperature. On the master unit it is reported as a fault, and on slave units it is reported as a warning. When the heat sink or transformer gets too hot, the device reduces its output power (derating) and logs a warning. The heat sink power unit needs almost no maintenance. A visual check is usually enough, because protective grids catch most of the dirt. Cleaning is normally needed only after an inverter failure. If the heat sink is dirty, clean it with compressed air and never with a vacuum cleaner.

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• sentence 1: support check: partial - Passages show a heat sink in Sunny Island and Sunny Central and that it can be cleaned, but don't define it as a metal cooling body carrying heat from power electronics.
• sentence 3: support check: partial - Heat Sink #1, #2, #3 temperature measurements exist, but the passages don't say they belong to larger central inverters.
• sentence 4: support check: partial - F113 (fault) and slave W114-116 warnings for heat sink overtemperature are listed, but 'main failure' and master/slave attribution of F113 are only implied by the slave labels.
• sentence 7: support check: partial - Cleaning only after inverter failure and compressed air with vacuum not permissible are stated, though 'can be cleaned' is milder than 'clean it', and 'never' is a slight strengthening of 'not permissible'.
• sentence 1: review: partial - The passages show heat sinks in the Sunny Island and Sunny Central, but they never call it a metal cooling body or say it carries heat away from the power electronics.
• sentence 4: review: partial - F113 is listed as a level-3 heat sink overtemperature entry and W114-W116 as level-1 slave warnings, but the passages never say it is the 'main' failure or that F113 belongs to the master unit. -->