Samsung DMR57 Training Manual page 42

Water Valve error Codes
Error Code ("oE") is displayed when the
case sensor is triggered. (oE) is usually
caused by a defective fill valve.
Error Code 4E is displayed if there is no
pulse input from the water supply valve
after the water supply starts. 4E may also
be displayed if the fill time exceeds 5
minutes. 4E can be a problem with the
external water supply, a restricted hose or
a defective water valve.
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