Ariston AQCF851BU Schematic

5407663 Issue 1 Nov. 2011

C00288739 - SM003340

Aqualtis

"B Energy"

CONDENSER

ELECTRONIC

TUMBLE DRYER

Pre 2011 Models:

8 Kg:

AQCF852BI
AQCF852BU

9 Kg:

AQCF952BI
AQCF952BS
AQCF952BU

Service
Information

Indesit Company UK Ltd

© 2011 Reg. Office: Peterborough PE2 9JB Registered in London: 106725

2011 Models

9 Kg:

AQC9BF5SZ1
AQC9BF5TZ1

Indesit Company

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, Earth Resistance & 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 - 12

‘B’ Energy Rating - Additional Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 - 14

Programme Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 - 21

Control Board Programming. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 - 25

Fault Codes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 - 28

Test Cycle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29

Wiring Diagram - for Models fitted with A1 Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30

Wiring Diagram - for Models fitted with A2 Module before Serial No. 00612.0000. . . . . . . .31

Wiring Diagram - for Models fitted with A2 type Module from Serial No. 00612.0000 . . . . .32

Dismantling Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 - 39

Serial Number Location

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

The serial number should be 9 digits long.

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TECHNICAL SPECIFICATIONS

First Production AQCF852... October 2008

AQCF952... October 2010
AQC9BF... October 2011

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 68 dBA approximately
Drum Volume 112 litres
Drying Load Dry weight maximum 8 Kg - AQCF852

Dry weight maximum 9 Kg - AQCF952 & AQC9BF5...

Programmes 16
Drying Sensing Levels Up to 5 depending on programme selected.
Door Operation Lever operated door catch
Heater Before Serial No. 008160000 = 2050W @ 230V

After Serial No. 008160000 = 2300W @ 230V

Electronic Platform EVO2 / Dryer
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 Before Serial No. 008160000 = Type 350

After Serial No. 008160000 = Type 362

Capacitor 8.5 uF

Production Changes

September 2009 72mm Cooling Fan and new shape Inlet Ring introduced.
November 2009 Stand-by feature introduced. This is incorporated in the User Interface module
Nov / Dec.2009 A2 type Heater and Module introduced (not interchangeable with earlier type)
May 2010 Motor covers removed, a new "BBC" module and a 2300W heater introduced.

Autumn 2011 Aesthetic changes to Base etc. Colour change from Grey to White.

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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 or 9Kg load of damp clothing (depending on

model). The drum is supported at 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 pa ssageways 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 throug h slot s in
the rear of the dryer.

The moisture removed from the recirculating air is pumped to a removable container mounted in the
left hand side of the console. The user can easily withdraw the container to dispose of the collected
condensed water. There is no requirement for venting to atmosphere on this dryer.

CONDENSER DRYER
AIR FLOW

Cooling Air Circuit (open to atmosphere)

Recirculating Air Circuit (sealed)

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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 up date.

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 fail ure, a one-shot cut-out thermostat i s fitted as safety device.

Stand-by Mode - from November 2009, a new interface module with 'Stand-by' mode was

introduced.
30 minutes after a programme has finished, if the machine is still 'On' and no buttons have been

touched, the machine will go into Stand-By mode. The LEDs and display will switch off. To reactivate
and to remove the machine from Stand-By mode, briefly press the 'On/Off' button and the console
lights will illuminate. Another programme can then be started or the machine can be switched off by
pressing the 'On/Off' button.

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CONSOLE FUNCTIONS

AQCF852... & AQCF952...

AQC9BF...

On/O Button & Light

Option Buttons and Lights

ECO

Light

Start/Pause

Button & Light

Programme
Progress Light

Display Panel

Empty
Water /
Clean Filter
Light

Child Lock
Button & Light

Programme Knob

Sensor Dry

Timed Dry

Delay
Timer

Clean Heat

Pump

Filter

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 runni ng 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 15 and 16, to see Programme descriptions.

Display

Indicates Current
Dryness Level

Sensor cycles only

Countdown Timer

Gives Estimated time to
end of delay or cycle

(See Sensing Levels)
Active. Auto Cycles
only

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

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Indicates Time Set

Active. Manual Time Cycles Only

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Display Information

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

Timed Dry

Delay Timer

Damp Dry

Iron Dry

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

Ready to Wear / Extra Dry

After selecting a Programme that has a Timed Dry Option, press the Timed Button and the display will
reduce the selected time each time you press and release this button (see Start and Programmes).
Each press decreases the set time
If the Timer Dry option is not available the display will ash and the buzzer beeps three times.
The selected time remains displayed after the programmestarts and cannot be changed after the after the

Start/Pause Button
Note: Timed Dry is only available on the following programmes:

Cottons - High Heat, Cottons - Low Heat, Shirts - High Heat, Shirts - Low Heat, Synthetics, Delicates.

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

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

After the Start/Pause Button

When the delay period nished the

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

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

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

: Dries your items ready to be put away.

: Dries your clothes ready to be worn.

, , , , , , , then and then repeats.

is Pressed.

advances the delay setting in 1 hour Increments from to then

is pressed the time cannot be changed.

symbol is o and the Time to End is displayed

Time to End

If the delay icon
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.

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

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.

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OPTION BUTTONS

AQCF852... / AQCF952... AQC9BF5...

Option Buttons & Lights

1.

2.

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.

2Alarm

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

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

3.

4.

1.

2.

Extra Care

Not available on all cycles and dryness levels.
This option modifies drum movement during the

later stages of the cycle, creating a softer
movement of the clothes. (The drum pauses are
longer and the drum rotation is shorter.)

Sound

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

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 anticlockwise

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

High Heat

Not available on all cycles.

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) would 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.

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COMPONENT DESCRIPTION

Door

The Aqualtis Tumble Dryer door, holds the customer interface controls and the water container
handle is only visible when the door is opened.

Door Handle - Pull to Open

Condenser
location

Door Switch

A single unit comprising two single microswitches, fitted to
the front panel of the dryer.

- One microswitch signals to the module whether the door
is opened or closed.

- One microswitch disconnects supply to the motor
whenever the door is open.

Control Module

This is an Electronic Device that monitors and controls all devices within the tumble dryer.
A production module is pre programmed at the factory with the relevant programmed file.

Service Modules are supplied non programmed and it is necessary for the Module to be programmed
by the Service Engineer. See page 22 - 25 for Module programming.

A2 type Module

During week commencing
23/11/2009 (Serial No.

91123.0001), a new A2
power module and heater
assembly was introduced in
production. This change was
gradually introduced
between
23/11/09 and 02/01/10.

During this period production

A2 Module in positon

may vary from the original

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build to the A2 build depending on the availability of A2 components. In order to enable easy
identification for models produced with the A2 power module and heater assembly, there will be a
circular BLUE label attached to the rear of the machine near the appliance rating plate. The label will
be discontinued when full production of the A2 module and heater is achieved on 02/01/10.
The A2 module and heater are NOT interchangeable with the earlier components.

Location of BLUE identifying label fitted to
machines produced with A2 module and
heater, before January 2010.

After January 2010 all production
is with the A2 type module

BBC Energy Saving Module - Introduced from Serial Number 008160000 (August 16th 2010)

"BBC" (Best B Class) Energy Saving Modu le introd uced. The B energy rating has been achieved by
the development of new firmware and a more intelligent dryness algorithm and settings file that ena­ble energy savings to be made, by reducing the heat during the latter stages of the drying process.

Filter

Comprises of a plastic mesh moulded into its housing, which slides into the front air duct.

Drum

The drum comprises of a zinc coated front and rear body and two removabl e plas tic li fters. Th e rear
of the drum is perforated to allow the passage of air. Fixed to the rear pressing is a support shaft which
runs in a bearing located in the rear panel of the dryer.

A drive pin and collar on the drum shaft prevents forward thrust during use. The front lock seam of
the drum rotates on bearing pads.

Note: Galvanised and Stainless steel drums are used in production, depending on the model of the
dryer.

One-Shot (Safety) Thermostat (White Spot)

Thermostat Location as seen inside heater cover

This device is a disc type thermostat set to operate
at 143°C. It is used as a safety device.
It is positioned above the element. If this device fails
it cannot be reset.

One Shot Operation for Dryers fitted with Module
Type A1:

The one-shot (safety) thermostat is wired in the

Rear (NTC)
Thermistor

Cycling

Thermostat

One-shot

Thermostat

control module Neutral circuit. If the one-shot fails
open-circuit, the dryer will be DEAD. No fault code
will display.

One Shot Operation for Dryers fitted with Module Type A2:

If the One-Shot (safety) Thermostat operates (opens) the machine will continue with the cycle, without
heating or drying the clothes, until the programme is completed. No fault code will display.

Cycling Thermostat

The cycling thermostat is mounted adjacent to the one-shot (safety) and is designed to open at
106°C. It limits the temperature of the heat entering the drum.

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Heater Unit

Consists of four coils wound on mic a supports, wh ich are supported b y mica end insula tors. These end
insulators fit into a steel pressing that also locates the rear thermal controls. This is fixed by screws to
the rear cover. This pressing also forms air guides. The heater elements, thermal controls, thermistors
and rear cover are supplied as an assembly and has a five-way connector provided to interface with the
electronic module. The heater has an upper and lower heat er. The lower (static) he ater is permane ntly
energised and the upper heater (dynamic) is cycled on and off by the control module during a
programme to maintain the correct temperature for the programme selected.

Note: Two different Wattage heaters have been used in production.
Before Serial Number: 008160000 = 2.05 KW
From Serial Number: 008160000 = 2.3 KW
See page 13 - BBC introduction.

Pump & Float Switch

Mounted on the bottom right hand side of the rear panel, con densate water from the condenser chamber
is pumped via an external hose to the water container situated behind the console.

The pump runs continually throughout the programme.

Operation of the Float Switch:

After continuing to tumble and dry for a
further one minute, the dryer will turn off
the heater and cool tumble for a further
10 minutes - before displaying the Fault
Code H20, with the Start/Pause button
flashing Orange and the Empty Water
light flashing.

Motor

A two pole P.S.C running at 2800 rpm with the impeller fitted to the rear end of the shaft and the drive
belt running directly in grooves in the front end of the shaft. It is protected from overload by a
self-resetting internal cut-out that interrupts the electrical supply to the windings.

It is used together with a capacitor that is mounted on the base of the dryer.

Drum Rear Seal

This unit comprises of a ring of foam with a webbing bearing face. Lubrication is applied to the drum
where the webbing surface runs, to reduce noise and wear. The seal reduces air losses at the rear of
the drum. The joints in the foam are sealed with glue and the joints in the webbing are stitched to further
reduce air leakage.

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‘B’ Energy Rating - Additional Components Information

BBC (Best B Class) Introduction

From Serial Number 008160000 (16th June 2010), a new module, heater, motor and condenser have
been introduced, and the base and motor covers, have been removed (see below).

The new energy saving module in combination with a more powerful heater maintain the "B" rated
Energy Efficiency.

Energy Saving Module Function

BBC (Best B Class) Energy Saving Module introduc ed. The B energy rating has been achieve d by the
development of new firmware and a more intelligent dryness algorithm and settings file which enable
energy savings to be made.

BASE Assembly

Aqualtis ‘B’ Energy Condenser Dryers have additional
components to improve airflow efficiency.

A) Base Cover *
B) Motor Top Cover *
C) Motor Cover Inner *
D) Motor Cover Outer *
E) Base Duct Lower

C

B

D

E

A

* Note: These covers A, B, C & D are fitted in production up to Serial Number 008160000.

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These covers are used
to retain the heat within
the Drying System to
increase the
Condenser efficiency.