Fault Code Lookup

HVAC Sales Master
E313
Indoor or outdoor unit capacity mismatch; communication only
This code typically points to
  • Incorrect indoor/outdoor capacity code selected

Next checks to confirm
  1. Check equipment configuration in installation instructions
  2. Correct capacity coding during setup / commissioning

Escalation
Warning only; system can still operate but may not meet intended efficiency or capacity
Reset behavior
Alarm clears when commissioning is exited / completed.
Service Soon
Schedule repair
Source
Lennox unit information doc 100027, p.15