Dometic FreshJet Series 4 / FreshJet Series 7 fault codes
The 7 fault codes below are the ones that apply to this Dometic air conditioner family. The other 9 Dometic air conditioner codes in our database belong to different model families — they are listed further down so you do not troubleshoot against the wrong table.
Covered model numbers
FreshJet Series 4FreshJet Series 7
Not on the list? Check the rating label before you troubleshoot — the code table below will not apply. Where to find it →
Fault codes on the Dometic FreshJet Series 4 / FreshJet Series 7
Electronics and drive faults on the FreshJet inverter board. E0 = communication failure be… EL warning
LIN-BUS / CI-BUS communication failure. The air conditioner has lost the data-bus link it … P0 warning
The inverter control module (IPM) has detected an over-temperature or over-current conditi… P1 warning
Under-voltage protection. The unit has detected the incoming supply voltage is too low to … P2 / P3 warning
P2 is AC over-current protection (the unit is drawing more current than allowed). P3 is ov… P4 / P5 / P6 / P7 warning
Refrigerant-circuit temperature protections. P4 = discharge tube (compressor outlet) overh… P9 warning
Compressor drive abnormal, or the compressor fails to start. The inverter drive cannot bri…
Codes that do not apply to this model
These 9 codes exist on other Dometic air conditioners. If your unit is showing one of them, it is not from this family — re-check the model number on the label before acting on any of these.
The thermostat has lost its communication link with the air conditioner/heat pump control … E2
The indoor (return-air) temperature sensor is reading open-circuit or out of range. The sy… E3
The indoor (return-air) temperature sensor is reading as shorted. As with E2, all heating … E4
The outdoor temperature sensor (fitted on select heat-pump models) is reading open-circuit… E5
The freeze sensor is reading open-circuit or out of range (documented on the Single Zone L… E6
The CCC2 thermostat reads an open circuit on the optional humidity sensor (only fitted on … E7
The CCC2 has lost 120 VAC line power to all of the air conditioner power module boards, so… E8
Invalid zone configuration: the heat pump and electric heat strip DIP switches are both se… E9
Invalid zone configuration: the dehumidifier DIP switch and either the heat pump or heat s…
Where the model number is
On the rooftop unit under the outer shroud, and usually repeated on a sticker inside the interior ceiling assembly after removing the filter cover.
Sources
- Dometic FreshJet Series 4 / Series 7 Operating Manual — Dometic (9620001685, Troubleshooting section, display code P9)
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