Samsung DW80H9940US/AA Service Manual page 52

Error Type Error mode
Water supply 4E
error 4E-1
50 _ Troubleshooting
Checking method
1. Check whether the faucet is open.
2. Check whether the water supply has been cut off.
3. Check whether any foreign material is in the Water Supply
4. Check the connection for the Water Valve connector.
5. Check whether the coil in Water Valve is conductive.
(Remove the connector before measuring.)
6. Check whether the water supply stops, after water is
supplied for 20 seconds.
7. Check whether the water supply stops after water is
supplied for 80seconds or 5 minutes.
8. Check whether the Water Valve is operating normally in the
Main PBA.
- Check the Water Valve Relay in Main PBA. : Check the
voltage between the Black wire (Number 9) of the CN202
and the Black wire of the CN101 connector.
Normal: 110 ~120V (while operating)
9. Check the Power Relay.
Corrective actions
- Open the faucet.
- After wait until the water supply resumes and turn off the power.
After the water supply resumes, turn on the power.
- Reconnect the Water Valve connector.
- Faulty: Replace the Water Valve.
- Faulty: Replace the Water Valve and Flow Meter.
- Check the water supply pressure. (> 0.5bar)
- Faulty: Replace the Water Valve and Flow Meter.
- Faulty: Replace the Main PBA assy.
- Normal: Replace the Water Valve
- See the "Power Relay error".