56 / E56
Outdoor suction temperature sensor is out of range
This code typically points to
- Suction thermistor inoperable or not properly connected
- Faulty reversing valve
Next checks to confirm
- Check connection to suction thermistor
- Repair/replace if needed
- Check reversing valve and replace if needed
Escalation
Outdoor fault indication
Reset behavior
Clears after sensor/valve issue is corrected.
Service Soon
Schedule repair