Samsung DMR78 series, Service Manual

Page: 41 / 106

4. Troubleshooting
4-3
Error type Error mode Checking Method Corrective actions
Water supply error 4E
1. Check whether the faucet is open. - Open the faucet.
2. Check whether the water supply has been cut off.
- Close the faucet and turn off the power. Wait until the water supply
resumes.
3. Check whether any foreign material is in the Water Supply Line and
the Inlet Valve filter.
- Remove the foreign material. Clean the filter with a brush.
4. Check the connection for the Inlet Valve connector. - Reconnect the Inlet Valve connector.
5. Check whether the coil in Inlet Valve is conductive (Remove the
connector before measuring.)
Normal: Approx. 1.2 kΩ
➢
- Faulty: Replace the Inlet Valve.
6. Check whether the Inlet Valve is operating normally.
- 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)
➢
NEW PBA
6-1.Check whether the Inlet Valve is operating normally.
- 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)
➢
- Faulty: Replace the Main PBA assy.
- Normal: Replace the Inlet Valve
NEW PBA
7. Check the Power Relay. - See the “Power Relay error”.
8. Check whether the water supply stops after water is supplied for 5
seconds.
- Replace the Flow Meter.
9. Check whether the water supply stops after water is supplied for 1
or 5 minutes.
- Check the water supply valve and increase the water pressure.
All manuals and user guides at all-guides.com
all-guides.com