Error-code hub
Friedrich displays an alphanumeric code on the indoor unit, and the 32 codes below cover the Floating Air Pro X, Pro and Select lines, which share a diagnostic scheme. E- codes are generally sensor or communication faults and F- and P- codes are protective shutdowns - the latter usually mean the system stopped itself rather than broke.
Unit applicability
This table is sourced for Floating Air Pro. If your unit is a different generation or product line not named here, the same display code may vary by generation.
Common codes first
Ranking basis: we do not have failure-frequency telemetry. These are ordered by breadth of affected systems in the SplitAtlas catalog - the documented product line's published model count, whether the same code appears on more than one product line, and any manual applicability notes we hold. This is a breadth ranking, not a popularity claim.
The system is reporting an outdoor coil temperature sensor fault.
The compressor exhaust temperature sensor is not reading normally.
The outdoor inverter power module has entered protection, often with outdoor fan or condenser conditions in the official cause list.
The unit sees supply voltage or internal voltage outside the expected range.
The indoor and outdoor units are not exchanging the required control signal.
The unit has detected an overcurrent condition, with airflow and dirty coil conditions also listed by Friedrich.
Safe first checks
These codes have homeowner-safe steps such as filters, airflow, condensate/drain checks, remote/controller items, or a single safe power reset. If the code returns, stop at the boundary in the card.
Power cycle once only if safe. If code 6 returns, the breaker trips, or home lights flicker, stop and call a technician or electrician.
Read the full code guideTurn the system off. Do not keep resetting it, and do not open electrical panels.
Read the full code guideTurn the system off and power cycle once if safe. Do not open the outdoor unit or electrical panels.
Read the full code guideWait for outdoor conditions to return to the operating range. Do not open the unit. Call for service if code 12 appears when outdoor temperature is not extreme.
Read the full code guideUse the Friedrich catalog to connect these manual error codes to current model pages and replacement options.
Floating Air Pro
Floating Air Pro
Floating Air Pro
Floating Air Pro
Floating Air Pro
Floating Air Pro
Friedrich lists code 22 as the compressor pre heating process and says it is normal mode in cold weather.
Friedrich lists code 77 as Wi-Fi connection enabled with a cycle-power note. It is not a heating or cooling fault by itself.
The system is reporting an outdoor coil temperature sensor fault.
The outdoor control and drive electronics are not communicating normally.
The outdoor EEPROM memory chip is not seated, installed, or operating normally.
The outdoor temperature is outside the range where the system will run normally.
The outdoor ambient temperature sensor circuit is not reading normally.
The compressor shell is too hot or the sensor/refrigerant condition is abnormal.
The indoor coil is too cold in cooling or overloaded in heating, and the manual lists sensor, board, and refrigerant-system causes.
The power factor correction circuit or outdoor drive board has entered protection.
The compressor drive system has failed or is not operating normally.
The compressor exhaust temperature sensor is not reading normally.
The outdoor fan is locked, blocked, disconnected, failed, or controlled abnormally.
Friedrich lists code 23 as a product leak involving the indoor unit, outdoor unit, or connecting pipe.
The outdoor board/chip fault is tied by Friedrich to mismatched drive-board or compressor usage.
The outdoor radiator/heat-sink area is overheating or its sensing circuit is abnormal.
The system has detected or is reporting excessive pressure protection.
The indoor room temperature sensor circuit is not reading normally.
The indoor coil temperature sensor circuit is not reading normally.
The indoor and outdoor units are not exchanging the required control signal.
The indoor EEPROM memory chip or indoor control board is not operating normally.
The indoor fan motor is blocked, disconnected, failed, or controlled abnormally.
The indoor unit has a grounding protection fault that Friedrich ties to the indoor control board.
The outdoor inverter power module has entered protection, often with outdoor fan or condenser conditions in the official cause list.
Friedrich lists code 56 as a product leak and notes the indoor fan is forced to high speed while the outdoor unit stops.
The refrigerant sensor and indoor control board are not communicating normally.
The unit sees supply voltage or internal voltage outside the expected range.
The indoor and outdoor units are not exchanging the required control signal.
The unit has detected an overcurrent condition, with airflow and dirty coil conditions also listed by Friedrich.
The unit has detected a high current protection condition tied to short-circuit causes in the manual.
The indoor display and indoor control board are not communicating normally.