Component Description - Hotpoint LTF11M121OUK Service Information

Indesit Company

COMPONENT DESCRIPTION

Aqua Stop Inlet Valve
The Aqua stop inlet water valve is located in
the tap end of the fill hose.
In the event of a split fill hose or the machine
leaking, water will fill the base tray and
operate the base float switch, which will
signal the module to switch off the inlet
valve.
Water Turbine
This is situated at the bottom of the Air Break. Consisting of a fixed reed switch and a magnet fitted
to an impeller. Unlike previous control systems, water fill is no longer dependant on the operation of
the pressure switch. The turbine generates a series of impulses as the water rotates the impeller
vanes.
The control module translates these impulses into litres of fill water (217 impulses is equal to 1 litre
of water). The turbine also regulates the maximum amount of water that can enter the tub, therefore
acting as an overflow device.
MODULE:
Mounted behind the plinth, this is an electronic device that monitors and controls all devices within
the appliance. If replacing this module, refer to the Module Programming section on in this manual.
DEA700 Module
The pressure and door switches and associated wiring are Low voltage (12 Volts and 10mA) with
RAST 2.5 connector.
VIRTUAL SENSORS:.
The pressure switch has been replaced by a system of "Virtual Sensors"
that will detect the presence or absence of water in the tub.
In practice, these sensors are the BLAC Wash Pump and the BLAC Drain
Pump.
The Virtual Sensors are able to detect full or empty conditions by
monitoring the operation of the BLAC wash pump and the BLAC drain
pump: By measuring the effort (energy consumption) expended power by
these motors, the Main Module can identify the exact operating situation.
See Tables below.
WASH PUMP
0 Empty Sensor
1 Full Sensor to Wash
2 Full Sensor to activate Heating Element
3 Dirty Filters/Foam (unsuitable situation)
4 Washing Pump Stopped
5 Speed Reduction
6 State Transition
Service Manual UK
Hose
connector
Inlet valve
DRAIN PUMP
0 Empty Sensor
1 -
2 Full Sensor
3 -
4 Drain Pump Stopped
5 -
6 State Transition
11 of 40
Protected outer
sheath of fill hose
English