Troubleshooting steps
Check Sullair service documentation for E21, verify system components
Compressor Error Codes
E21 – System Error
System error 21
Details
System error 21 detected on Sullair compressor. Check service documentation.
Error typeerror
MeaningSystem error
Typical causesSystem fault, component failure
SolutionsCheck Sullair service documentation for E21, verify system components
Severitymedium
Catalog references
Where this appears
SullairE21
Utilities
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FAQ
Common questions
What is E21?
E21 is a system error. Consult Sullair service documentation for specific diagnosis.
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