E221, Temperature Sensors - Samsung RC090MHXEA Service Manual

E221, Temperature Sensors

E221 is an error with the outdoor unit air sensor mounted on the
back of the unit in a black tube at the top. It's connected to the
main PCB in connector at the top right of the PCB called CN43
in a white and red plug; it's the bottom two wires.
To read what this sensor is
measuring you can ask the unit
using the interrogation function
on the outdoor unit main PCB
At the bottom of the main PCB
are 4 buttons, you need to
press K4 4 times.
The display will show 04 XX
The XX will be the temperature this sensor is measuring; this sensor
measures the air temperature at the back of the outdoor unit, you will
need to compare the coil temperature with the reading, if they are
different the sensor needs replacing.
www.freedomhp.co.uk ©G Hendra Nov 18 21