E902 - Samsung RC090MHXEA Service Manual

E902

E902 is an error with the outdoor unit, upper (outlet or flow) water
heat exchanger sensor. It's connected to a yellow plug on the
bottom right of the main PCB connector CN44 in a yellow plug; it's
the middle two wires
You can view this sensor in the
test mode from the remote
controller inside.
To access TEST mode press blue set button and
test button together for 6 seconds.
The controller will display TEST.
Press the blue view button twice, a temperature will be
displayed and the word OUT1 shows. This is the reading from
the sensor.
If you compare this with the actual water flow temperature it
should be exactly the same. If they are different the sensor
needs replacing.
To exit service mode press and hold cancel delete for 6
seconds
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