37 38
WATER LEVEL SENSOR UNIT
1. CIRCUIT DIAGRAM
2. EXPLANATION OF CIRCUIT
• Push the power switch. And, in order to carry on the action of course selection, input the selection of
frequency according to each water level selection.
• The frequency of water level sensor in each water level becomes square wave and is sended to the
MICOM.
If the water level is selected ‘HIGH’ in washing, water suppply proceeds until inputing the frequency 22.70
KHz of ‘HIGH’ in the MICOM terminal No. 24. Being finished the water supply, washing process is
proceeded. After the washing process, water level reaches to RESET point, and then after the (D) + 60
seconds, the spin process begins.
• The value of the frequency between the MICOM terminal No. 24 and the GND.
3. CAUTION FOR A/S
• The output of the frequency in the WATER LEVEL SENSOR varies in accordance with temperature and
using condition. If it doesn’t input the output of the WATER LEVEL SENSOR in the MICOM, the error
message is displayed as ‘E9’. In case of proceeding the water supply continuously in ‘HIGH’ water level,
it is desirable to change the WATER LEVEL SENSOR because of the defect in the WATER LEVEL
SENSOR.
• Check the TR Q4(A1270Y)
• Being checked with tester, the value of the voltage reaches about 4V.
• As the frequency is low, the water level is higher.
WATER LEVEL NAME FREQUENCY WATER LEVEL DWF-1095X
HIGH 22.52KHz 400
±
15 96L
MIDDLE 23.04KHz 340+10, -15 81L
LOW 23.56KHz 280
±
15 65L
SMALL 24.05KHz 220
±
15 49L
E.SMALL 24.33KHz 180
±
15 36L
RESET 25.02KHz
0 25.40KHz
60
±
20
4. CAUTION AND CHECKING FOR A/S
• If load is active as soon as the power switch is ‘ON’, check the driving TRIAC of load.
• Check the MICOM output terminal, if the load doesn’t act although the TRIAC isn’t anything wrong.
• Soemtimes it is happened that TRIAC DRIVE TR has circuit or an open circuit. In this case, being
measured the resistance between the TR E & C with tester, the resistance value should be near the
∞Ω. If not, the DRIVE TR is out of order.
• If the ceramic condenser(C17, C19, C20, C23, C24, C29) using by protecting the noise between the
GATE & T1 of each TRIAC has a short circuit, it has no voltage drop between the T1 and GATE.
Therefore, the TRIAC is not turn on.
• If MICOM terminal No. 6 is not active from 5.4V to 0V, all DRIVE TR of the TRIAC are not turn on.
Therefore, the TRIAC is not out of order, to begin with, check the micom terminal No. 6 and TR Q2(KTA
1664) necessarily.
• The TRIAC’s names and values of the snubber & resistance of the total parts are as follows.
SM12JZ47(12A), SM8JZ47(8A), SM3JZ47(3A)
• CHECK the resistance of the T1 &
T2 of TRIAC. (∞Ω).
• CHECK the total parts without fail,
in case the TRIAC has a short
circuit.
BCR1AM-12L
• CHECK the resistance of the T1 &
T2 of TRIAC.(∞Ω).
• CHECK the total parts without fail,
in case the TRIAC has a short
circuit.
shape
T1 T2 G
shape
T1
G
T2
LOAD
CW WASH
CCW WASH
DRAINAGE
HOT & COLD
WATER
BUBBLE
GENERATOR
PUMP
TRIAC’S NAME
SM12JZ47
BCR12PM-14L
SM12JZ47
BCR12PM-14L
BCR1AM-12L
SM3JZ47
BCR1AM-12L
SM8JZ47
BCR8PM-14L
GATE’S
RESISTANCES OF
LIMITED
CURRENTS
62Ω, 1/2W
62Ω, 1/2W
330Ω, 1/4W
62Ω, 1/2W
330Ω, 1/4W
62Ω, 1/2W
VALUES OF THE
SNUBBER
100Ω, 1W+683K
AC 250V
100Ω, 1W+683K
AC 250V
100Ω, 1W+103K
AC 250V
100Ω, 1W+223K
AC 250V
100Ω, 1W+103K
AC 250V
100Ω, 1W+103K
AC 250V
RESISTANCES OF
TOTAL PARTS
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