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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 supply proceeds until inputing the frequency 23.0 KHz of ‘HIGH’ in the
MICOM terminal No. 38. 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. 38and 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
'LEVEL SENSING ERROR' (See page26). 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 lower, the water level is higher.
WATER LEVEL NAME
FREQUENCY
WATER LEVEL
HIGH
23.0 kHz
450 ± 15
MIDDLE
23.5 kHz
380 ± 15
LOW
24.0 kHz
300 ± 15
SMALL
24.4 kHz
240 ± 15
RESET
25.30 kHz
OVER FLOW
22.75 kHz
0V
5.4V
KHZ
f = 22 ~ 25 KHZ
