Hotpoint MSZ900DFUK, Информация о сервисе

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Indesit Company
Service Manual UK English
Ice Maker Circuit through the Display, Main Control, Emitter and Receiver Boards
Ice Maker Solenoid Valve Feedback Description
The feed-back circuit mainly gives the information to the microprocessor on how many times the Ice
Maker Valve has been energised. This is recorded by the microprocessor and it is multiplied by the
valve flow rate in order to record how many litres of water flows through the valve and consequently
through the filter.
So, the Water Filter Indicator can be updated accordingly. The feed-back is also used by the Main
Board in order to understand if the Ice Maker is stuck at water fill position and to avoid water overflow.
The following describes how the feed-back works: If the Ice Maker Valve command lasts more than 20
seconds the Ice-Maker equipment will be switched OFF until the following points are satisfied in the
following sequence:
1) Press the reset button (alarm and buzzer OFF/Ice-Maker OFF).
- When the alarm is enabled the buzzer will sound and the Ice Mode LEDs will blink alternately.
2) Unplug the appliance from the electricity supply.
3) Plug the appliance back into the electricity supply.
Note:
a) If the user tries to switch ON the Ice-Maker before executing point 2, the alarm will re-start again
and the relay will remain in the OFF state.
b) If after point 3) the situation persists and the above alarm will restart., further diagnosis will be
required. Refer to Page 36.
+5VDC
+5VDC
+
3
2
1
4
3
1
2
User Interface
N
Main plug
220Vac
N
Main Board
TX
RX
Feed-back
Ice valve
Water Filter
Indicator
L
L
Neutral
Line
uP Relè
Ice-Maker
Line
Neutral
Ice
Valve
(black)
(IR_Emitter)
3
Short
(Line/Phase)
Pole 3 of 10
Line
2
1
Heater
De-Frost
Ice-Maker
Neutral
Emitter
4
(Neutral)
Receiver
(Line/De-Frost)
3
Pole 1 and 9 not connected
(IR_Line)
Pole 5 of 10
2
5
6
(IR_Receiver)
Pole 4 of 10
(Physical GND)
Heater De-Frost
Pole 2 of 10
(Water_valve)
4
Line
This is Pole
1 of 10 for
NAR 120V
version
n.c.
Pole 8 of 10
Pole 10 of 10
Pole 7 of 10
uP
1
Bimetal
Pole 6 of 10
DF 2010 Models