Daewoo DWD-WD125 Series Service Manual page 51

Symptoms of Inspection
Inspection Method
Breakdown Spot
Water
1) Suspension of water supply
supply not
2) Water tap locked
carried out
3) Cold-hot water hose incorrectly
connected
4) If no defect is found, dismantle water
supply hose and check water supply
valve filter.
Water
1) Measure coil resistance in water
supply valve
supply valve.
2) Remove top cover and visually
check for separation of water supply
valve terminal connector and wiring
short/ connection status.
3) In case water valve operation sound
is heard, but water supply is not
carried out, check for blocking of
water supply valve or restraint on
plunger.
Pressure
1) Check for 'E9' in display window.
Switch
Water PCB
1. Check PCB pin connector insertion
supply not
status.
carried out
2. Power is supplied to water supply
valve terminal, but water supply is
not administered.
Continuous PCB
1. Immediate supply when power is
water supply
turned on
Water
1. Check if water supply is continuously
supply valve
carried out even if power is not on.
Drainage
1. Check for normal operation of water
drive motor
supply valve/ water supply status.
(valve
2. Check if water is drained through
housing)
drainage hose.
3. Check for foreign substances inside
valve housing.
4. Check for foreign substances in drive
motor wire.
5. Forcefully restore SUS wire.
Inspection Result Problem Identified
- Cold/ hot water hose switched -Defect in cold/ hot water
-Large amount of rust, sand and hose assembly
dust, etc. -Defect in cleaning of water
supply filter (blocked)
-5.3kW or higher -Coil short
-Connector loosened/ not -Connection defect
inserted
-Electric wire short -Electric wire short
-Sound and defect in water -Structural defect in water
supply due to foreign supply valve
substances in bellows
-E9 -Loosening of pressure S/W
terminal or electric wire
short
-Defect in pressure S/W
Electric wire easily loosened Pin connector housing not
when tugged inserted
PCB water supply circuit open, Defect in water supply circuit
damaged (water supply relay
operation not carried out)
PCB water supply circuit or Water supply relay short
relay short (continuous
conduction to valve)
Water supply bellows Defect in water supply valve
blocked/ deformed
-Not closed due to foreign -Foreign substances in valve
substances inside drainage housing
housing -Foreign substances
-Wire caught by foreign -Defect in drive motor
substances outside drive restoration
motor
-Forced restoration not possible
50
Repair Method
-Assemble cold/ hot
water hose correctly.
-Clean water supply filter.
-Replace water supply
valve.
-Try reconnection or
remove elements of
connection defect.
-Try reconnection or
remove elements of
connection defect.
-Replace water supply
valve.
-Connect terminal of
pressure S/W.
-Connect terminal of
PCB.
-Replace pressure S/W.
Completely insert
connector housing.
Replace PCB.
Replace PCB.
Replace water supply
valve.
-Remove foreign
substances.
-Remove foreign
substance.
-Replace drive motor.