Error code
4C
Meaning
The dishwasher is not getting enough water to run
Moderate
What to do
Why this happens
Possible causes include a closed water supply valve, low water pressure in the supply line, an Aqua stop malfunction, failure of the assembly guide water sub to detect pulses, blockage by foreign material in either the water supply line or filter within the valve, a defective water valve coil, or a defect in the main PBA.
How to fix it
Open the water valve fully — if that does not help, check and clean the small filter screen where the water hose connects to the dishwasher
SourceSamsung service manual