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Indesit
Company
Service Manual UK
English
MACHINE FUNCTION
Drying Overview
Cold air drawn into the dryer cabinet interior through louvres in the cabinet base, passes through the
large hole in the inner back panel adjacent to the fan and driven through the element housing on the
inner back panel. After passing through the element windings and through holes in the drum back plate
into the drum interior, the now warm dry air is driven through the load to the front of the drum.
A webbing seal, fixed to the inside of the inner back panel, prevents warm air being driven into the
cabinet interior. As the drum revolves, the load is tumbled through the warm air stream that extracts
moisture from the damp fabric. The now moist and cooled air passes through the filter in the air duct on
the back of the front panel, where any fluff picked up from the load is removed. It then travels through
the front to rear air duct, leaving the dryer at the rear outlet.
If required, a vent hose may be attached to the outlet, to take exhaust air away from the dryer.
A cut-out on the element housing cuts the electricity live supply to the element, if the air temperature in
the housing becomes too high due to a restriction in the airflow - e.g. a blocked filter.
Controls Overview
The user controls consist of a LED display, programme selection knob, option buttons, start reset
button and a stand-by button.
The control system consists of a control module, 2 thermistors and a conductivity sensor.
The thermistors and conductivity sensor send values back to the control module, the control module
then determines the programme duration and dryness of the load in set values for a particular
programme held within the control module software.
The control module is located behind the right hand side panel and there is a service port behind the
plinth cover that allows attachment of a Computer to programme the EEPROM or test the control
module.
The control module can be programmed with the relevant Eeprom file it the module is replaced, the
Eeprom file becomes corrupted or if an updated file becomes available.
Each of the sensing programmes has a maximum time of 180 minutes and will default to this time at
the start of a programme.
Once the programme has started an estimate is made within 10 minutes of the programme starting to
determine the programme length, this is achieved by use of the front thermistor, rear thermistor and
conductivity sensor, the display will then count down from this estimated time.
If the estimation gives a time more than that displayed, the display remains at the value when the
estimate was made but continues to count down and when this reducing count reaches the time on the
display the display will then continue to decrement.
If the clothes are not dry when the 10 minute cool tumble period is reached, the control module does
not start the cool tumble but continues to dry the clothes until the value from the conductivity sensor
indicates that the clothes are dry, this then advances the programme into cool tumble.
If after the maximum programme time of 180 minutes the clothes are still not dry, the programme
advances to cool tumble and completes the programme. No fault is indicated if this occurs.
