How do I fix External Fan Fault on a Solis?

Check the external fan, clean it per the manual. Then: Replace the external fan per the manual if cleaning does not fix it.

Solis

Fan_H Alarm

External Fan Fault

External fan not running correctly.

Common causes

Fan blocked or dirtyFan failure

What to check

STEP 1

Check the external fan, clean it per the manual.

STEP 2

Replace the external fan per the manual if cleaning does not fix it.

Escalate if

Persists after replacement

Need full interactive diagnosis?

Faultpath walks you through decision trees, fault codes, and commissioning — built for solar & battery engineers.