Samsung DMR78AHS/XAC Service Manual page 41

Error type Error mode
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 Line and
4. Check the connection for the Inlet Valve connector.
5. Check whether the coil in Inlet Valve is conductive (Remove the
6. Check whether the Inlet Valve is operating normally.
Water supply error 4E
NEW PBA
6-1.Check whether the Inlet Valve is operating normally.
7. Check the Power Relay.
8. Check whether the water supply stops after water is supplied for 5
9. Check whether the water supply stops after water is supplied for 1
4-3
Checking Method
the Inlet Valve filter.
connector before measuring.)
Normal: Approx. 1.2 kΩ
➢
- Check the operation of the Inlet Valve
Normal: 120V
➢
- Check the Inlet Valve Relay.
: Check the voltage between the white wire of the Main PBA
CN1 connector and the brown wire of the CN14
Normal: 120V (while operating)
➢
- Check the operation of the Inlet Valve
Normal: 120V
➢
- Check the Inlet Valve Relay.
: Check the voltage between the white wire of the Main PBA
CN101 connector and the brown wire of the CN201
Normal: 120V (while operating)
➢
seconds.
or 5 minutes.
Corrective actions
- Open the faucet.
- Close the faucet and turn off the power. Wait until the water supply
resumes.
- Remove the foreign material. Clean the filter with a brush.
- Reconnect the Inlet Valve connector.
- Faulty: Replace the Inlet Valve.
- Faulty: Replace the Main PBA assy.
- Normal: Replace the Inlet Valve
NEW PBA
- See the "Power Relay error".
- Replace the Flow Meter.
- Check the water supply valve and increase the water pressure.
4. Troubleshooting