The F11 and F28 error codes in air conditioning systems vary in meaning depending on the manufacturer. Below, we break down their possible causes and solutions for different brands.
F28 Code HAIER and YORK:
The F28 code indicates an issue with the compressor circuit. This happens because the IPM (Intelligent Power Module) does not detect the compressor winding.
Possible causes:
- Compressor connection missing:
- When the system is powered on, the compressor is not properly connected.
- Errors in UVW connections:
- The connections between the compressor and the mainboard may be incorrectly installed or faulty.
- Damaged or disconnected cables:
- Burnt or externally disconnected cables can also trigger this error.
General Electric:
For this brand, the F28 code indicates a compressor overload, which suggests excessive electrical load or a malfunction in the compression system.
F11 Code HAIER and YORK:
The F11 code points to an anomaly in the compressor. While the electronic module detects the winding, it cannot operate the compressor properly.
Possible causes:
- Weak winding:
- The winding’s power is insufficient to start the refrigerant flow.
- Stuck compressor:
- A mechanical blockage in the compressor prevents it from functioning.
PANASONIC:
For this brand, the F11 code relates to faults in switching between cooling and heating modes.
Technical details:
- In cooling mode, the error appears if the temperature in the pipes exceeds 45°C (113°F).
- In heating mode, the error is triggered if the temperature drops below 10°C (50°F).
Possible causes:
- Problems with the temperature sensors.
- Malfunctions in the switching mechanism between operating modes.
