Hotpoint Ariston AQCF851BUEU, AQCF851BUFR, AQCF851BUIT, AQCF852BIEU, AQCF852BUEU Service Information

Indesit Company UK Ltd

© 2008 Reg. Office: Peterborough PE2 9JB Registered in London: 106725

Service
Information

Aqualtis

8 Kg

"B Energy"

CONDENSER

ELECTRONIC

TUMBLE DRYER

Models Covered
AQCF851BUEU 61513
AQCF851BUFR 61408
AQCF851BUIT 61375
AQCF852BIEU 61523
AQCF852BUEU 61526
AQCF852BUSK 61527

5407471 Issue 1 Nov. 2008

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Service Manual UK

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SAFETY NOTES & GENERAL SERVICING ADVICE

1. This manual is NOT intended as a comprehensive repair/maintenance guide to the appliance.

2. It should ONLY be used by suitably qualified persons having technical competence applicable
product knowledge and suitable tools and test equipment.

3. Servicing of electrical appliances must be undertaken with the appliance disconnected (unplugged)
from the electrical supply.

4. Servicing must be preceded by Earth Continuity and Insulation Resistance checks.

5. Personal safety precautions must be taken to protect against accidents caused by sharp edges on
metal and plastic parts.

6. After Servicing the appliance must be rechecked for Electrical Safety. In the case of appliances which
are connected to a water supply (i.e.: Washing Machines, Dishwashers & Food Centres etc.) checks
must be made for leaks from seals gaskets and pipe work and rectification carried out where
necessary.

7. It can be dangerous to attempt ‘DIY’ repairs / maintenance on complex equipment and the Company
recommends that any problem with the appliance is referred to its own Service Organisation.

8. Whilst the Company has endeavoured to ensure the accuracy of the data within this publication they
cannot hold themselves responsible for any inconvenience or loss occasioned by any error within.

INDEX

Safety Notes & General Servicing Advice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Technical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Dryer Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 - 5

Console Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6 - 9

Component Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10 - 11

‘B’ Energy Rating - Additional Components . . . . . . . . . . . . . . . . . . . . . . . . . . .12 - 13

Programme Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14 - 16

Control Board Programming. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17 - 18

Dismantling Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19 - 23

Fault Codes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24 - 26

Auto Test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Wiring Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Serial Number Location

The serial number is located on the front
panel behind the door - open the door to
see it.

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TECHNICAL SPECIFICATIONS

First Production October 2008
General Model Colour Commercial Code

AQCF851BUEU Silver 61513
AQCF851BUFR Silver 61408
AQCF851BUIT Silver 61375
AQCF852BIEU White 61523
AQCF852BUEU Silver 61526
AQCF852BUSK Silver 61527

Features Electronically controlled tumble dryer comprising of an interface module

fitted into the door and a control module mounted on the plinth,

connected by a serial link.

Country of Origin Great Britain
Dimensions

Height 850 mm
Width 595 mm
Depth 584 mm
Weight 41 kg (Packed)

Energy Class B
Noise Level 65 dBA approximately
Drum Volume 112 litres
Drying Load Dry weight maximum 8 kg
Programmes 16
Drying Sensing Levels Up to 5 depending on programme selected.
Door Operation Lever operated door catch
Heater 2050W @ 230V
Electronic Platform EVO2
Heater Controls Variable using electronic control and thermistors
Safety Thermostats Cycling Thermostat: 106°C

One Shot Thermostat: 143°C (White Spot)

Rear Thermistor) 25°C = 400 KΩ to 540 KΩ

100°C = 15 KΩ to 17 KΩ

Front Thermistor 25°C = 400 KΩ to 540 KΩ

100°C = 15 KΩ to 17 KΩ

Motor Type 350 Single phase capacitor run 2 pole induction motor - 2800 rpm
Capacitor 8.5 uF

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DRYER FUNCTION

Drying Overview

These models are freestanding tumble dryers with a full width metal door.
The drum is capable of accepting a maximum 8 kg lo ad of damp clothi ng. The drum is su pported a t

the front by 2 wheels mounted on the front air duct and a single bearing at the rear located in the
rear panel. A shaft fixed to the rear of the drum runs in the rear bearing. The drum is driven by a belt
which passes around its periphery and onto the shaft of a motor secured to the base of the dryer.

The belt is tensioned by a pulley mounted to the motor.
The motor also drives two impellers (rotors), fixed to each end of its shaft. The front impeller draws

cold air into the machine, while the rear impeller recirculates drying air.
The addition of heat to the recirculating air is provided by a heating unit attached to the rear panel,
enabling the air to hold moisture when in contact with the wet load , thus causing it to dry. As the warm
recirculating air passes through the drum, it collects lint as well as moisture. To prevent the lint from
blocking the heat exchanger (condenser), the air is passed through a filter located in the front air
duct.

The filter unit is positioned so as to be easily removable for cleaning by the user. After passing
through the filter, the circulating air is ducted through passageways in a heat exchanger (condenser)
located in a housing on the base of the dryer.

Cold air is drawn into the machine and flows across the heat exchanger passageways. This cold air
is not mixed with the warm, damp recirculating air. See the condenser airflow picture below.
This has the effect of reducing the circulating air temperature, causing it to give up its moisture.
(Cold air holds less moisture than hot air.) The now warm cooling air is exhausted through slots in
the rear of the dryer.

The moisture removed from the recircul ating air is pumped to a r emovable container moun ted in the
left hand side of the console. The user c an easily withdraw the co ntainer to d ispose of the co llected
condensed water. There is no requirement for venting to atmosphere on this dryer.

Cooling Air Circuit (open to atmosphere)

Recirculating Air Circuit (sealed)

CONDENSER DRYER
AIR FLOW

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Controls Overview

The user controls consist of an Digit display, programme selection buttons, option buttons;
Start/Pause button and an On/Off button.

The control system consists of a control module, 2 thermistors and a conductivity sensor.
The conductivity sensor is mounted in the front air duct. A single wire connects the sensor to the
control module. The thermistors and conductivity sensor sends values back to the control module.
The control module then determines the programme duration and dryness of the load to 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, Smart Card Reader or Handheld Device to
programme the Control Module.

The control module can be programmed with the relevant settings file if 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 240 minutes.

Once the Automatic cycle has started, the machine’s sensors, (front and rear thermistors and the
conductivity sensor) continually monitor the dampness of the drying clothes. Once a final dry time
has been determined, the display will update.

If the display counts down to 10 minutes and the clothes are not at the required dryness level, the
display will hold at 10 minutes, depending on the programme in progress and the material being
dried, the dryer will either wait until the correct dryness level is reached and move to the cool down
period, or wait until the machines sensors are able to recalculate the dryness time and the display
will update accordingly.

If, after the maximum programme time of 240 minutes, the clothes are still not dry, the programme
advances to cool tumble and completes the programme. No fault is indicated if this occurs.

The module also controls the heater. This has an upper and lower element. The lower (static)
element is permanently energised (except in cool tumble) and the upper element (dynamic) is cycled
on and off by the control module during a programme to maintain the correct temperature within the
drum for the programme selected.

If the user turns off the power or disconnects the mains cable or there is a power cut, the dryer will
remember its last settings and resume the programme when the start button is pressed.

The start of a programme can be delayed up to a maximum of 18 hours programmed in 1 hour steps.
Pre-crease care (see page 8) can only be selected if a timed delay has been selected; this option

tumbles the clothes for 3 seconds every 30 minutes for the duration of the time delay.

If selected, the Post crease care option (see page 8) tumbles the clothes after the programme has
finished for 3 seconds every 4 minutes up to a maximum duration of 10 hours.

In the event of a controls or thermistor failur e, a one-shot cut-out thermostat is fitted as safety device.

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CONSOLE FUNCTIONS

Option Buttons

ON OFF BUTTON and LIGHT

Push to switch the dryer On and Off.
If the button glows the dryer is turned on and either running or waiting to be started.

PROGRAMME KNOB AND INDICATOR.

Used to select the required programme option.
16 timed auto and special programmes are available.
Consult the programme chart on pages 14 and 15, to see Programme descriptions.

Display

Indicates Current
Dryness Level

Sensor cycles only
(See Sensing Levels)
Active. Auto Cycles
only

Indicates Time Set

Active. Manual Time
Cycles Only

Countdown Timer

Gives Estimated time to
end of delay or cycle

Displays during delay
start, auto, special and
manual programmes.

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Display Information

Note:

During Sensor Cycles the Centre Timed display screen is blank
During Timed Cycles the left Sensor screen is blank
During Special cycles only the left Countdown screen is on and illuminated.

Sensing Levels

After selecting a programme that has a Sensing Dry Option, press and release the button until the
required dryness sensing level is displayed. If the sensing option is not available the display will ash
and the buzzer beeps three times.
Note: ‘Cottons - High Heat’ and ‘Jeans’ programmes are the only programmes which have all ve
dryness level options - all other programmes have only 4 options.

Dryness levels available

Damp Dry

: Dries your items ready to be ironed using a machine or rotary ironer.

Iron Dry

: Dries you items ready to be ironed with a hand iron.

Hanger Dry: Dries you clothes ready to be hanged for nal drying; Use this program if
you do not need the items to be fully dry as it uses less Energy.

Cupboard Dry

: Dries your items ready to be put away.

Ready to Wear / Extra Dry

: Dries your clothes ready to be worn.

Timed Dry

After selecting a Programme that has aTimed Dry Option, press the Timed Button and the displaywill

Note: Timed Dry is only available on the following programmes:
Cottons - High Heat, Cottons - Low Heat, Shirts - High Heat, Shirts - Low Heat, Synthetics, Delicates.

reduce the selected time each time you press and release this button (see Start and Programmes).
Each press decreases the set time

, , , , , , , then and then repeats.
If the Timer Dry option is not available the display will ash and the buzzer beeps three times.
The selected time remainsdisplayed after the programme starts and cannot be changed after the after the

Start/Pause Button

is Pressed.

Delay Timer

After selecting a Programme that has a Delay Timer Option a delay start time can be selected.
Each press of the Delay button

advances the delay setting in 1 hour Increments from to then
and then after ve seconds cancels the delay.
For delays of 10 hours or more the display counts down the time in hours for rst ten hours, then the display

shows

and then counts down in minutes. For delays less then 9 hours or less the display shows hours

and minutes and then count down in minutes for all of the delay.

After the Start/Pause Button

is pressed the time cannot be changed.

When the delay period nished the

symbol is o and the Time to End is displayed

Time to End

If the delay icon

is o the time displayed is the Time to End of the programme running.

When timed programmes are selected the time displayed throughout the cycle is the actual time
remaining.
When an Automatic programme is selected the time displayed is an estimate of the time remaining.
When the programme is selected the display shows the time required to dry a full load, after around 10
minutes the controller calculates a better estimate of the cycle time
Thetimetoendisdisplayedinhoursand minutes and counts down each minute.
The colons between the hours and minutes display ashes to show that the time is counting down.
The Display also shows if there is a problem with your dryer, if this occurs the display will show F
followed by a fault code number, the four option lights and the pause light will also ash Orange.

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OPTION BUTTONS

1. Mini Load

Should be selected if between 1 & 2 kg of clothes are to be dried. The Time to END display is
adjusted to give a more accurate Cycle Time to end estimation time.

2. Alarm

If selected, the buzzer will sound at the end of the cycle. Beeps 3 times when the cycle finishes.

3. Pre-Crease Care

Option can be selected if the Delay Start Option has been selected; the clothes are tumbled
occasionally during the Delay period to help prevent creases developing.

- 3 secs Clockwise

- 30 min Pause

- 3 secs Anti -Clockwise

- 30 Pause--- continuously until programme starts.

4. Post Crease Care

Can be selected, if the clothes will not be removed as soon as the cycle is finished.
This option occasionally tumbles the clothes to prevent creases developing, while the clothes are in

the drum when the cycle is finished.

- 3 secs clockwise

- 237 secs Pause

- 3 secs anti clockwise

- 237secs pause ……continuously until the clothes are removed.
This option will run for a maximum of 10 hours.

1.

2.

3.

4.

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Progress and Warning Lamps

ECO Led

The Eco LED will illuminate when the user adjusts the knob/option settings, which involve an
energy reduction, from the default settings.

Auto Cycles - If the sensing level is reduced. (Hanger, iron or damp dry)
Timed Cycles - If the time is adjusted to 120 minutes or lower.

Child Lock (Button)

To enable the Child Lock function, press and hold the "Child Lock" button until the Button Led
illuminates. All the controls on the dryer are now disabled.

If the selector is turned or an Option is pressed the Child Lock button will flash and the machine will
bleep, to remind the customer that the Child Lock is active.

To remove the controls child lock, press and hold the child lock button and until the button lamp
goes out.

Drying Led

Is illuminated when the machine is drying.

Cool Tumble

Is illuminated, when the dryer is on a cycle, and the heater element is off, this would be the
cool down period at the end of the cycle.

End

Is illuminated when the programme has finished its cycle.

Empty Water/ Clean Filter

Is illuminated (permanently "on"), at the end of every cycle as a reminder to the customer to
empty the water container and to clean the filter after every use.

If the Empty Water / Clean Filter Led illuminates during a cycle, (H2) woul d also be shown in
the display. The machine has sensed the water container is full, after approximately
1 minute the heater is turned off and continues for 10 minutes with cool air only, before
displaying the fault (H2) and LED. To continue the cycle, empty the container, push the
Start/Pause button and the machine will continue.

Clean Condenser

Is illuminated every 25 cycles to remind the customer the condenser should be regularly
removed and cleaned. The Clean Condenser Warning is only a reminder and is not
connected to any sensing device-It does not indicate the condition of the condenser.