Samsung DMT300 Series Training Manual page 37

Trouble Shooting
Error Type Error Mode
„Quick‟ LED
Water supply
Error
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 Line and the Inlet Valve filter.
4. Check the connection for the Inlet Valve
connector.
5. Check whether the coil in Inlet Valve is
conductive (Remove the connector before
measuring.)
➢ Normal: Approx. 1.2 kΩ
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
CN101 connector and the brown wire of the CN201
➢ Normal: 120V (while operating)
7. Check the Power Relay.
8. Check whether the water supply stops after water
is supplied for 5 seconds.
9. Check whether the water supply stops after water
is supplied for 1 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
- Remove Retainer.
- Check voltage
- See the "Power Relay error".
- Replace the Flow Meter.
- Check the water supply valve and increase the water pressure.