Dometic CCC2 error code E9
Invalid zone configuration - the dehumidifier DIP switch and either the heat pump or heat strip DIP switch are set ON in one zone. Heat pump, heat strip, and air conditioner operation lock out in the affected zone.
What to check, and in what order, is in the app. The flow Dometic CCC2 Diagnostic Mode — Output Test + Sensor/Config Read walks this code step by step with the pass/fail measurements, wiring schematics and procedures that go with it, and it works offline in the bay.
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- Dometic Comfort Control Center 2 (CCC2) Service Manual
- Dometic RV A/C Technician Service & Diagnostic Reference (Error/fault code table)
- Dometic Customer Service 800-544-4881
- Dometic RV AC Technician Service Diagnostic Reference (rv-tech-resources/22-dometic-rvac/Dometic_RV_AC_Technician_Service_Diagnostic_Reference.md)
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