Daewoo DWC-42R User manual

1
The information in this service guide is intended for use by
individuals possessing adequate backgrounds of electrical ,electronic
and mechanical experience .Any attempt to repair a major appliance
may result in personal injury and property damage .The manufacture
or seller cannot be responsible for the interpretation of this
information ,nor can it assume any liability in connection with its use.
WARNING
To avoid personal injury ,disconnect power before servicing this
product .If electrical power is required for diagnosis or test
purpose ,disconnect the power immediately after performing the
necessary checks.
IMPORTANT SAFETY NOTICE

ITEM PART CODE NAME ITEM PART CODE NAME
1 HWD-1 󴖦Water holder󴖦 21 HWD-21 Fix board 1
2 HWD-2 󴖦Top cover󴖦 22 HWD-22 Door axis 2
3 HWD-3 Cold tank 23 HWD-23 Door holder
4 HWD-4 Hot tank 24 HWD-24 Rubber
5 HWD-5 󴖦Compressor󴖦 25 HWD-25 Bottom board
6 HWD-6 Silica gel tube 26 HWD-26 Evaporator
7 HWD-7 Blue faucet 27 HWD-27 Fix board 2
8 HWD-8 Red faucet 28 HWD-28 Left panel
9 HWD-9 Electric cord with plug 29 HWD-29 Dispenser middle board
10 HWD-10 Indicator light 30 HWD-30 Fix bar
11 HWD-11 Frount panel 31 HWD-31 Back board 1
12 HWD-12 Right panel 32 HWD-32 Condensator
13 HWD-13 Water receiver cover 33 HWD-33 Compressor thermostat
14 HWD-14 Water receiver unit 34 HWD-34 Back board 2
15 HWD-15 Refrigerator door 35 HWD-35 Heat switch
16 HWD-16 Door axis 1 36 HWD-36 Cold switch
17 HWD-17 Door seal 37 HWD-37 Temp control 1
18 HWD-18 Dapboard 38 HWD-38 Temp control 2(auto)
19 HWD-19 Refrigerator 39 HWD-39 Connection pillar
20 HWD-20 Water receiver(in side)
PARTS LIST

CIRCUIT DIAGRAM
FUNCTION
Heating System:
Theory : The stainless steel heater is directly touched with the water in
the hot tank ,and let the water hot .
4

Hot Water Tank:
Power : 500W-600W The Water Temperatue : 8 5-95
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Hot Water Tank Material : SUS304
Hot Water Tank Capacity : 5.0L/hour
Temperature Control : Thermostat (Chinaware)
Cooling System:
Theory : The compressor changes the refrigerant between liquid and vapour ,and let
the water and refrigerator cool .
Parts View:
System Data:
Power : 100W-120W
The Water Temperatue : 6-10
Cold Water Tank Material : SUS304
Cold Water Tank Capacity : 1.0L/hour
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NO. PROBLEM PROBLEM ANALYSIS SOLUTION
The power off Plug the power plug tightly
The heating switch off Turn on the heating switch
Connection terminal loose Fix the connection terminal
Heating thermostat failure replace the thermostat
Temperature control I failure Replace temp control
1 No hot water
The heater short circuit or open
circuit Replace hot water tank
Use water enough in a short
time Wait for a moment and use it
Connection terminal failure Maintance or replance it
2 Water not hot enough
Temperature control II failure Replance it.
PCB connection loose Fisup connection
LED strike down Replace it
3
T
condition but heating light
oReplace it
he machine working in
ff PCB burn out
Cold switch invalidation Fix or replace it
PTC mangled Replace PTC.
Thermostat I invalidation Adjust or replace it
Cooling system block
Refrigerant leakage
4No cold water
Repair it by maintain center
(compressor cooling)
Compressor badness
Cold water use much Wait for a moment and use
Temperature higher than
Turn off the m
normal achine and cooling it
Thermostat invalidation Adjust thermostat
5 Water not cold enough
T Add refrighere is a lack of refrigerant erant
C Cleat outondenser surface gather dust dust
Refrigerant leakage or loss Add refrigerant or repair it
6Cooling time longer than
normal Compressor failure Fix compressor or replace it
empty bottle replace it with another one.
Pressure of bottle inner lower one.
than outside replace it with another
Ice block the pipe Turn off the compressor for a while
Water tap failure Replace it
There is air or gas in the bottle Push tap and let air out
7No water running out from
taps
ter tube fold Reinstall or adjust itThe wa
The water tube fold Reinstall or adjust it
Ice or others block the pipe ckClear away the blo
8Hot or cold water is
Shortage
Wate tap aging Replace water tap
ROUBLE SHOOTINGT
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7
e ter tapWater tap leakag Replace wa
Supporter leakage Replace it
The bottle leakage Replace it
Water tube aging and leakage Replace it
Check way leakage Replace it
Hot tank leakage Replace it
Evaporator comes out
condensation
Seal the heat preservation foam
9 Water dispenser leakage
ottleLeakage from purify bottle Replace purify b
Heater tank produce scale Clean it with detergent
Scrub with other part while
co orking.mpressor is w
Adjust place each other
10 Water dispenser is noisy
Throttle place utter noise Replace it by expert
Environment emperature
lhigher than norma
Cooling or stop the machine for a
while.
Refrigerant leakage Repair it by manufacture center
11 Cooling system goes on
working
Thermostat invalidation Adjust or replace it
12 Heating system goes on
working
Temperature controller
invalidation
Replace it
Evaporator frost Seal the heat preservation foam
PTC invalidation Replace it
13 Compressor starts frequent
e expertVacuumize shortag Repair it by
Hot water steam flow into
liminate it
cooling tank
Check and e
Thermostat invalidation Replace thermostat
14 Hot and cold water mixed
Check valve failure Replace it
15 Foul odor in air around
dispenser
is empty or not
Press the hot dispenser button until
air from the
Hot water tank
completely full.
water flows to remove
hot tank.
Separator needs cleaning. See cleaning the separator
16 or
odor See cleaning and sanitizing the
Water has poor taste
Unit needs to be sanitized.
water tanks.

686, AHYEON-DONG MAPO-GU
SEOUL, KOREA
C.P.O. BOX 8003 SEOUL, KOREA
DAEWOO ELECTRONICS Corp.