Navien NFC-H Series E773: Improper gas type or gas connection detected
The Navien manual for this product family lists E773 as: Improper gas type or gas connection detected.
Navien NCB-H Series E788: Incorrect gas type setting
The Navien manual for this product family lists E788 as: Incorrect gas type setting.
Navien NCB-H Series E773: Improper gas type or gas connection detected
The Navien manual for this product family lists E773 as: Improper gas type or gas connection detected.
Navien NPN-E Series E773: Improper gas type or gas connection detected
The Navien manual for this product family lists E773 as: Improper gas type or gas connection detected.
Navien NPN-E Series E056: Abnormal operation: modulating gas valve
The Navien manual for this product family lists E056 as: Abnormal operation: modulating gas valve.
Navien NPN-U Series E773: Improper gas type or gas connection detected
The Navien manual for this product family lists E773 as: Improper gas type or gas connection detected.
Navien NPN-U Series E056: Abnormal operation: modulating gas valve
The Navien manual for this product family lists E056 as: Abnormal operation: modulating gas valve.
Navien NPE-S2 Series E773: Improper gas type or gas connection detected
The Navien manual for this product family lists E773 as: Improper gas type or gas connection detected.
Navien NPE-S2 Series E788: Incorrect gas type setting
The Navien manual for this product family lists E788 as: Incorrect gas type setting.
Navien NPE-A2 Series E773: Improper gas type or gas connection detected
The Navien manual for this product family lists E773 as: Improper gas type or gas connection detected.