All fault codes
Danfoss Fault Codes
5 codes · Free lookup by certified technicians
This page lists every Danfoss fault code we have documented, including the most likely cause and step-by-step repair guide. Use the search box below — dashes and capitalization are ignored.
5 of 5 codes
E1
critical
Air Temperature Sensor Failure (Sair)
The return air sensor is out of range or disconnected.
E2
warning
Evaporator Sensor Failure (S3)
Evaporator sensor with invalid reading.
E6
warning
Data Communication Failure
Loss of communication with the master controller or module.
A1
critical
High Temperature Alarm
Temperature above the configured limit.
A2
warning
Low Temperature Alarm
Temperature below the set limit.
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