Samsung DMT300 Series Training Manual page 33

Troubleshooting and Adjustment – Resolution by symptom
3. When water supply is not working
Water supply is not working.(4E)
Connect
the water
supply
valve
firmly.
N
The water supply pressure is too low. Check the mid
valve of the water supply and increase the water supply
Do you hear a "Zee"
sound in water supply
condition?
N
Is the connected
condition of each terminal
of the water valve normal?
Y
Is the power connected to the
water supply valve coil? About
1.2KΩ
Y
Is the water supply relay
working normally?
Y
Is the main relay working normally?
Refer to "Main relay does not work".
Y
Water supply is done for 3
seconds and the stops.
N
Water supply is done for 1 minute
or 5 minutes and then stops.
Y
pressure.
Y
Is the water faucet
open?
Y
Is the water
disconnected?
N
Is there a filter on
the water supply
hose and water
supply valve?
N
N
N
PCB ASS'Y is defective. Please
N
Main relay is defective. Please
Y
Flow meter is defective. Please
N
Check point
1. Water supply pressure.
2. Refer the service manual page.4-2.
N
Open the water faucet.
Y
Lock the water faucet and
turn off the power. "Use
the unit when the water
supply is normal"
Y
Clean the filter with a
toothbrush etc.
replace it.
replace it.
replace it.
Water supply valve is defective.
Please replace it.