Asko T700 Series User manual

1

ASKO

T7OOT7OO

T7OO

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SERIES DRYERSSERIES DRYERS

SERIES DRYERS

SERVICE MANUALSERVICE MANUAL

SERVICE MANUAL

CONTENTSCONTENTS

CONTENTS

Introduction and Safety RegulationsIntroduction and Safety Regulations

Introduction and Safety Regulations

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22

2

The Drying ProcessThe Drying Process

The Drying Process

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..........................................

33

3

InstallationInstallation

Installation

..................................................................................................................

.........................................................

44

4

Dryer FeaturesDryer Features

Dryer Features

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1111

11

Overheat ProtectionOverheat Protection

Overheat Protection

............................................................................

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1212

12

FF

F

ault Tault T

ault T

racingracing

racing

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1313

13

Common ProblemsCommon Problems

Common Problems

......................................................................................

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1414

14

Components and Measurement VComponents and Measurement V

Components and Measurement V

aluesalues

alues

....

..

1515

15

TT

T

est Pest P

est P

rogram and Error Messagesrogram and Error Messages

rogram and Error Messages

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1818

18

Consumption VConsumption V

Consumption V

aluesalues

alues

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1919

19

TT

T

ools and Applications Areasools and Applications Areas

ools and Applications Areas

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2121

21

Service InformationService Information

Service Information

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2323

23

Appendix AAppendix A

Appendix A

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6262

62

IndexIndex

Index

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6363

63

2

You have in your hand the ASKO Service Manual for

the new generation of dryers that are friendly to the

environment in both their manufacture and use.

This new generation of dryers has been designed for

ease of servicing. By this we mean that it's a simple

job, for example, to replace a damaged side panel.

That's why we've changed the design from a one-

piece casing to a split casing.

To secure parts and wiring, we have replaced many

of the screws by plastic snap fasteners, and certain

parts have integrated ribbon cabling, all for

simplifying service.

We have also integrated service aids, such as hooks

to hang parts on, so that you can use both hands for

installation.

TT

T

HE DIFFERENT MODELSHE DIFFERENT MODELS

HE DIFFERENT MODELS

The table below shows the Model numbers and the

correlating model type:

Model Type

T700 TD 11 (Mechanical vented)

T720 TD 22 (Mechanical condensing)

T760 TD 33 (Electronic vented)

T780 TD 44 (Electronic condensing)

T700 is a thermostatically-controlled dryer with air

extraction. T720 is a timer-controlled dryer with a

condenser.

T760 is a sensor-controlled electronic dryer with

air extraction. T780 is a sensor-controlled electronic

dryer with a condenser.

The T760 and T780 have a humidity sensor that

can tell when the clothes are dry. On these models

you can choose from eleven languages for the LED

display.

We hope that this Service Manual will be a positive

tool in your daily work. If you have any questions

concerning servicing ASKO products, contact the

ASKO Advisory Center at:

1161 Executive Drive West

Richardson, Texas 75081

972-238-0846

INTRODUCTION AND SAFETY REGULATIONS

GENERALGENERAL

GENERAL

The electrical and plumbing installations should be

carried out by a qualified electrician and plumber.

Be sure to follow all Federal, State, County and local

codes.

WARNINGWARNING

WARNING

Always switch off the main electrical power supply

when dismantling and assembling the dryer.

WARNINGWARNING

WARNING

Always use a grounded EMC wristband when

working with electrical components, such as

printed circuit boards and electronic control

units.

T720 AND T780: TRANSPORT/WINTERT720 AND T780: TRANSPORT/WINTER

T720 AND T780: TRANSPORT/WINTER

STORAGESTORAGE

STORAGE

If the dryer is to be transported or stored for the

winter in unheated premises, make sure the

condensation water tank is empty.

DISPOSALDISPOSAL

DISPOSAL

The dryer is manufactured and labelled for recycling.

Contact your local refuge authority to find out how

the dryer should be scrapped and recycled properly.

This number is normally found in the “City of”

numbers provided in your telephone book.

WARNINGWARNING

WARNING

To prevent children from being accidentally

locked in the drum, the door(s) must be removed

when discarding the dryer.

3

T700 AND T760 – VENTED DRYERST700 AND T760 – VENTED DRYERS

T700 AND T760 – VENTED DRYERS

These models are vented dryers; therefore, they

required outside venting for a proper installation.

Room temperature air is heated by the heating

element and drawn into the drum, where it extracts

the dampness from the clothes. The paddles in the

drum prevent the clothes from sticking to each other.

Air passes through the lint filter in the front door,

through the exhaust system and out the exhaust vent.

On Model T700, on the way through the air

extraction system, the air passes over the thermostats.

The thermostats measures the exhaust temperature

as it leaves the dryer. When using the automatic

program, the thermostats indicate when the clothes

are dry.

On Model T760, on the way through the air

extraction system, the air passes a humidity sensor.

The sensor measures the amount of humidity in

the clothes. If you are using an automatic program,

the sensor indicates when the clothes are dry.

THE DRYING PROCESS

T720 AND T780 – CONDENSING DRYERST720 AND T780 – CONDENSING DRYERS

T720 AND T780 – CONDENSING DRYERS

These models are non-vented, condensing dryers

that are used in areas where venting is not possible.

Condenser dryers have two circulation systems: one

for drying air and one for cooling air. In the

following illustration, the black arrows show the

warm drying air, and the white arrows the cooling

air at room temperature.

1. Room temperature air

2. Air that has been heated.

3. Maist air going through the lint filter

4. Air passing the thermostats

5. Air going out the exhaust

Model T720 is a timed dryer only. The user sets

the amount of time for the dryer to run.

The drum paddles prevent the clothes from sticking

to each other. On the way through the air extraction

system, the air passes a humidity sensor.

Model T780 has a sensor that measures the amount

of humidity in the clothes. If you are using an

automatic program, the sensor indicates when the

clothes are dry.

DRYING AIRDRYING AIR

DRYING AIR

Room temperature air is heated by the heating

element and passes through the drum, where it

blows through the clothes and extracts the dampness

from them.

The air is filtered through the lint filter in the front

door, goes down to the fan and onwards to the

condenser unit.

On its way through the condenser the saturated air

releases its water content. The extracted water falls

into a holder, from which it is either pumped up to

a water tank or taken out via a drain hose to a floor

drain or similar.

COOLING AIRCOOLING AIR

COOLING AIR

The condenser is cooled by air at room temperature,

drawn in through the rear of the machine. The air is

blown through the condenser and exhausts through

a grill in the bottom hatch. If the machine is built

into a cabinet, the air is drawn through the gap

between the floor and the bottom of the machine.

T700 and T760 Air Circulation

T720 and T780 Air Circulation

The black arrows

show the warm

drying air. The

white arrows

show the cooling

air at room

temperature.

4

INSTALLATION

Read these instructions carefully and completely

before you install the machine. The installation

should be carried out by a qualified service technician

who is familiar with all local codes and ordinances

for electrical and plumbing connections.

NOTE:

Cosmetic damage must be reported to the dealer

within five days from the date of purchase. After

unpacking the dryer, thoroughly check the unit for

cosmetic damage.

SPECIFICASPECIFICA

SPECIFICA

TIONSTIONS

TIONS

Height 33-1/2”–34-1/2 (850–876 mm)

Width 23-7/16” (595 mm)

Plus exhaust hose connection

Depth T760/T780: 23-7/16" (595 mm)

T700/T720: 24-7/16” (620 mm)

Depth w/door open All Models: 46-1/16”

Weight T700/T760: 86 lbs (39 kg)

T720/T780: 103 lbs (47 kg)

Drum material Stainless Steel

Outer casing Stove-enamelled hot-dipped

galvanized steel with powder

coat paint or Stainless Steel

on T760 and T780

Power requirement 2800 watts

Electrical connection Stand-alone: single-phase,

208–240 V, 15 Amp

ASKO washer connected to

ASKO dryer: single-phase,

208–240 V, 30 Amp

Internal fuses (2) 15 amp.

Heating element 2500 watts

Speed 52 rpm

Drain (T720/780) 7’ 6-3/4” rubber hose

Vent hose Must be UL, CSA, or

C

UL

(not provided) approved.

AIR EXHAUST CONNECTION (T700/T760)AIR EXHAUST CONNECTION (T700/T760)

AIR EXHAUST CONNECTION (T700/T760)

The exhaust hose can be connected at the rear or on

either side of the dryer. When the machine is delivered,

the exhaust outlet at the rear is open. The exhaust air

hose should be routed the shortest possible way and as

straight as possible from the dryer to the formal vent

section. This will ensure proper, more efficient drying.

The dryer is shipped with a stub pipe already installed

on the rear exhaust outlet. The consumer or installer

must purchase a UL-CSA-approved exhaust hose.

The length of the vent for dryers can vary. The

general use is 22 feet of 4-inch ridged vent hose in a

straight run. Subtract 4 feet for every 90° elbow,

including any elbow at the dryer.

WARNINGWARNING

WARNING

To reduce the risk of fire, vented dryers must be

exhausted outdoors or the equivalent.

Exhaust Hose ConnectionExhaust Hose Connection

Exhaust Hose Connection

To connect the exhaust hose to the rear outlet,

follow the steps below:

1. Push the vent hose onto the stub pipe and secure

it with a clamp.

2. With the hose attached, insert the stub pipe into

the hole. It should snap into place.

3. After you push the dryer into place, check for

kinks in the hose. (Be careful not to use too

much hose.)

WARNINGWARNING

WARNING

Never cover the end of the dryer stub or vent

hose with anything to catch lint, except for a UL-

approved vent basket.

Exhaust Outlet

Stub

Clamp

Hose

(not provided)

5

INSTALLATION

CONDENSACONDENSA

CONDENSA

TION DRAIN CONNECTIONTION DRAIN CONNECTION

TION DRAIN CONNECTION

(T720/T780)(T720/T780)

(T720/T780)

If possible, you should install the dryer so the

condensed water will continuously flow into a drain

or sink. To do this, follow the instructions below:

1. Disconnect the short hose (1) from the blue

nipple. (It’s okay to let the hose hang down.)

2. Connect the rubber hose supplied with the dryer

to the blue nipple (2).

3. Run the hose to a drain or sink, as illustrated.

Try to keep the hose as straight as possible.

NOTE

The drain hose must not be more than 40” (1016

mm) above the floor.

Back of dryer

40”

(1016 mm)

maximum

height

CONNECTION TCONNECTION T

CONNECTION T

O A VENTILAO A VENTILA

O A VENTILA

TIONTION

TION

DUCT (T700/T760)DUCT (T700/T760)

DUCT (T700/T760)

1. Connect the exhaust hose to a ventilation

exhaust fitting or to a discharge through the wall.

2. Secure the hose joint to the outlet stub on the

machine.

3. Run the hose with as few bends and loops as

possible to the point of discharge. If necessary, it

can be extended to a maximum of 22 feet (6600

mm) of 4” (100 mm) diameter ridged hose.

Make any bends as gentle as possible. A maximum

of four 90° bends may be fitted in the hose. The

more bends and the longer the hose, the less air will

circulate through the machine, which will impede

drying performance. Subtract 4 feet (1200 mm) for

every 90° elbow.

If more than 22 feet of hose is needed, the diameter

must be increased to 6” or 8” (152 mm or 203 mm).

If the hose is taken to a wall outlet, a ventilation grill

should be fitted to prevent reverse flow of cold air.

WARNING!WARNING!

WARNING!

This appliance should never be exhausted into a

chimney, a wall, a ceiling, or a concealed space of

a building. Only a metal ventilation grill should

be used.

Subtract 4 feet

(1200 mm) for

every 90° elbow.

Make sure nothing is blocking the ventilation grill.

Fit the ventilation grill to the

outside or inside of the wall.

Ventilation grill

6

INSTALLATION

FREESTFREEST

FREEST

ANDING INSTANDING INST

ANDING INST

ALLAALLA

ALLA

TIONTION

TION

The dryer can be placed next to the washing machine.

There should be at least 1/2” (12.5 mm) of space

between the washer and dryer.

It is essential that the machine is level and the

locknuts are tight to eliminate vibration.

When installing the dryer next to a wall, be sure to

leave at least 1/2” (12.5 mm) of space between the

unit and the wall. This allows for door swing of

dryer. Never push the washer flush against the wall

because it may damage the machine casing or the wall.

All hole measurements are

to the center of the holes.

NOTE

Do not raise the dryer higher than 34-1/2”.

BUILBUIL

BUIL

TT

T

-IN INST-IN INST

-IN INST

ALLAALLA

ALLA

TION (T700/T760)TION (T700/T760)

TION (T700/T760)

Models T700 and T760 can be installed beneath a

cabinet or worktop with a minimum height of 34”

(864 mm). There must be a gap of about 1/4” (.64

mm) all around the machine, including between the

rear edge of the machine top panel and the back wall.

The opening width must be at least 24” (610 mm).

Space must also be available for the exhaust hose on

the left, right or rear of the machine. See the diagram

for hole sizes and positions. Note that the hole

measurements are to the center of the hole.

When installing the

dryer next to a wall, be

sure to leave at least

1/2” of space between

the unit and the wall.

7

INSTALLATION

STST

ST

ACKED INSTACKED INST

ACKED INST

ALLAALLA

ALLA

TIONTION

TION

ASKO dryers can be mounted on top of any

matching ASKO washer. Mounts are supplied with

the machine.

To install the dryer on top of the washer, follow the

steps below:

1. Remove the two outside screws (20 torx) from

the back of the washer that holds the top in

position and use them to secure the metal

brackets, as illustrated.

2. To ensure the dryer is correctly positioned on

top of the washer, align the plastic cups with

the front top edge of the washer.

To position the plastic cups, break off the left

tab (A) on the cup to be placed on the right

side of the washer and break off the right tab

(B) on the cup to be placed on the left side of

the washer. Put the cup in place before removing

the protective paper to get a general area where

the cups will be placed.

4. Once the cups are in place, break off the

remaining plastic tabs.

5. Lift the dryer into

position. Raising the

front edge, push the

dryer backwards until

it engages with the

brackets on the back

of the washer.

6. Carefully lower the

front of the dryer,

making sure the feet fit

into the plastic cups.

Tumble dryer

Washer

Stacked InstallationStacked Installation

Stacked Installation

WARNING!WARNING!

WARNING!

Never stack a washer on top of a dryer!

Total height 67”.

Adjustable to 69”.

Plastic cups

Washer

back

Metal brackets

Two metal brackets for

securing the dryer to

the washer

Two plastic cups to

secure the dryer legs.

3. Remove the protective

paper from the self-

adhesive surface beneath

the cups. Being careful

not to press the adhesive

surface against the top

of the washing machine,

use the tabs to position the cups (as illustrated)

then press them firmly into place.

8

INSTALLATION

Connecting a ThreeConnecting a Three

Connecting a Three

-wire P-wire P

-wire P

ower Cordower Cord

ower Cord

ELECTRICAL CONNECTIONSELECTRICAL CONNECTIONS

ELECTRICAL CONNECTIONS

The power supply cord must be grounded. If the

machine is to be used in a wet area, the supply must

be protected by a residual current device.

Connection to a permanently wired supply point

must be made only by a qualified electrician.

As supplied: Single-phase, 208–240 V, 60 Hz,

2800 Watt total rating

2500 Watt heater rating

NOTE:NOTE:

NOTE:

In Canada, the dryer is delivered ready-fitted with a

four-prong plug intended for connection to a single-

phase supply.

WARNING:

The receptacle on the rear of the machine is

designed to accommodate ASKO washers ONLY

(rated 208–240 V.) To use this receptacle, you

must use the ready-fitted plug supplied with the

washing machine or an equivalent. The supply

connection must be 208–240 V, 20 A.

ASKO washers rated 208–240 V have two internal

fuses of 15 A each.

Remove cover to

access terminal box.

(Requires a 20-Torx

screwdriver.)

WARNING!WARNING!

WARNING!

Before starting this procedure, be sure the power

is turned off at the breaker/fuse box.

Power Supply Cord

You will need a three-wire power supply cord with

three No. 10 copper wires and a matching three-

wire receptacle of NEMA Type 10-30R, as illustrated

below:

1. Turn the power off at the breaker/fuse box.

2. Remove terminal block cover (20 torx).

3. Assemble 3/4”

UL-listed strain

relief into the

hole below the

terminal block

opening.

4. Loosen or

remove center

terminal block

screw.

5. Connect neutral

wire (white ) of

power supply

cord to the

center, silver-

colored terminal

screw. Tighten screw.

6. Connect the other wires to outer screws.

7. Tighten the strain relief screws.

8. Replace terminal box cover on back of dryer.

9. Plug dryer into wall receptacle.

10.Turn power on at breaker/fuse box.

11.Turn on the main power switch on the dryer.

(The power indicator light should come on.)

9

INSTALLATION

Connecting a FourConnecting a Four

Connecting a Four

-wire P-wire P

-wire P

ower Cordower Cord

ower Cord

WARNING!WARNING!

WARNING!

Before starting this procedure, be sure the power

is turned off at the breaker/fuse box.

Power Supply Cord

You will need a four-wire power supply cord with

four No. 10 copper wires and a matching four-wire

receptacle of NEMA Type 14-30R, as illustrated

below. The fourth wire must be identified with a

green cover and the neutral conductor by a white

cover.

1. Turn the power off at the breaker/fuse box.

2. Remove terminal block cover.

3. Assemble 3/4” UL-listed strain relief into the

hole below the terminal block opening.

4. Remove center terminal block screw.

5. Remove ground

wire (green with

yellow stripes)

from external

ground connector

screw. Fasten under

center, silver-

colored terminal

block screw.

6. Connect ground

wire (green) of

cord to external

ground conductor

screw.

7. Connect neutral wire (white) of cord under

center screw of terminal block.

8. Connect the other wires to outer screws.

9. Tighten the strain relief screws.

10.Replace terminal box cover on back of dryer.

11. Plug dryer into wall receptacle.

12.Turn power on at breaker/fuse box.

13.Turn on the main power switch on the dryer.

(The power indicator light should come on.)

10

INSTALLATION

REVERSING THE DOOR HINGESREVERSING THE DOOR HINGES

REVERSING THE DOOR HINGES

The door hinges on ASKO dryers are reversible. The

dryers are shipped left-hinged. To reverse them,

follow the steps below:

WARNING!WARNING!

WARNING!

Switch off the main power supply before you start

this procedure.

3. Pull the door out and to the left

as you turn the hinge counter

clockwise.

4. Remove the top hinge pin

then turn the hinge upside

down and put the hinge

pin into the top hole.

1. Remove the lower cover

by first removing the

two screws (A) at the

bottom of the machine.

Next, grasp the sides and pull it forward and

down.

2. Remove the

three screws

holding the

hinge.

5. Repeat steps 1–4 for the bottom hinge.

8. Remove the cover

plate by pushing it

down then lifting it

out from the top.

7. Remove the door

latch by pushing it

up then lifting it

out from the

bottom.

9. Reverse steps 6 and 7 to place the door latch

and cover plate into their new positions.

10.Tighten the screws on the sides of the doors to

hold the latch and cover plate in place.

12.Remove the screw in the top

right corner of the lower cover,

as indicated in the illustration.

(If you have a condenser dryer,

you will need to open the

condenser container door.)

13.Now you are ready to mount the door on the

right side. Holding the door at an angle (as

illustrated), fit the hinge pin into the top hole.

11.Using a flathead screwdriver,

remove the plastic plugs in the

upper and lower edge of the door

and place them in the empty

holes on the opposite side.

14.Tighten the screws in the

order illustrated at right (a, b,

c).

15.Replace the screw you

removed in step 12 (d).

16.Replace the lower cover (see Step 1 on this

page).

6. Loosen the two screws on both sides of the door

so you can remove the magnetic door latch and

the cover plate.

11

DRYER FEATURES

FRONT VIEWFRONT VIEW

FRONT VIEW

REAR VIEWREAR VIEW

REAR VIEW

Condensed water

container

(T720 & T780)

Control

panel

Bottom

cover

Lint filter

cover

Reversible

door

Front

panel

Side

panel

Top

cover

Condensed

water drain

hose (T720

and T780)

Reset

button

NOTE: Canadian dryers

are equipped with an

electrical cord.

Terminal

box

Receptacle for

ASKO washer

12

OVERHEAOVERHEA

OVERHEA

T PROT PRO

T PRO

TECTIONTECTION

TECTION

ASKO dryers are designed with an overheat

protection switch that automatically turns off the

machine if the temperature is too high. This could

happen if the lint filter or exhaust hose becomes

clogged with dust.

Should the machine turn itself off because of

overheating, first make sure the following parts are

clean and free of lint and dirt:

• lint filter and filter cover

• exhaust hose, exhaust vent and hose

• fan housing and fan

If none of these are the problem, check the

following:

• Check both 15 Amp fuses on the back of the

dryer

• Be sure the switch actuator is making contact

with the Start switch.

• On models T760 and T780 make sure a program

(P1–P4) has been chosen.

• Check for a control unit fault

• Check for a heating element fault

NOTE:

If the dryer overheats frequently, it may not be

vented properly or the room in which it is located

may not have sufficient air circulation.

Press the reset

button to start the

machine. You should

hear a click when

the reset button is

depressed.

OVERHEAT PROTECTION

If the overheat protection switch is activated, you

have to reset it before the machine will run. To do

this, press the reset button (rubber disk) on the back

of the machine, as illustrated to the right. You should

hear a click when it engages. The machine will not

start until it has cooled sufficiently.

13

FAULT TRACING

The machine won’t start.The machine won’t start.

The machine won’t start.

1. Make sure the power is turned on. (The indicator

light should glow red.)

2. Check that you set the program or time correctly.

3. Make sure the door is closed securely.

4. On Models T720/T780, make sure the

condenser tank is empty.

5. Check that the electric plug is securely in the

socket.

6. Check the house breaker/fuses.

7. If all of the above options are eliminated, the

overheat protection has probably been activated.

(See page 12.)

The machine starts but it stops when IThe machine starts but it stops when I

The machine starts but it stops when I

release the Start button.release the Start button.

release the Start button.

1. The overheat protection has probably tripped.

Clean the lint filter and let the machine cool

down before trying again. (See page 12.)

The machine takThe machine tak

The machine tak

es too long to dryes too long to dry

es too long to dry

..

.

1. Make sure the dryer is installed according to the

instructions on pages 4–10.

2. Check that the lint filter is clean.

3. If dryer sheets are being used (not

recommended), the lint filter may need to be

washed with warm water and a soft brush to

clean any blocked holes.

4. The dryer may be overloaded, not allowing

sufficient room for the warm air to circulate

properly or the clothes to tumble freely.

5. The laundry should only be damp when it comes

out of the washer. If it seems too wet, it should

be spun in the washer at a faster or longer spin

cycle.

6. Make sure the outside vent exhaust is not

blocked.

7. On models T720/T780, make sure the

condenser is not blocked with dust or lint.

The clothes are coming out wrinkled.The clothes are coming out wrinkled.

The clothes are coming out wrinkled.

1. The clothes should be removed as soon as the

dryer signals the end of the cycle. If it isn’t

possible to remove the clothes right away, use

the Anti-crease option.

2. Heavy fabrics and light fabrics should be dried

separately.

3. Dry only permanent press items together.

4. Dry in smaller loads.

5. Use slower spin speeds.

6. Use fabric softener in the rinse program.

7. Try using a lower wash temperature, especially

for permanent press and delicate items.

8. Make sure the customer is using the correct

temperature for the type(s) of fabric being dried.

The motor is running but the drum isn’tThe motor is running but the drum isn’t

The motor is running but the drum isn’t

turning.turning.

turning.

1. The drive belt could be broken.

2. The drive belt may be dislodged from the motor

pulley.

3. The drive belt may be off the idler pulley.

4. Be sure nothing is preventing the drum from

turning.

The machine makes a funny noise.The machine makes a funny noise.

The machine makes a funny noise.

1. A slight rumbling may be heard when you first

turn on the dryer. This is normal and it should

only last a few seconds.

2. Make sure the customer wasn’t drying tennis

shoes or something heavy when the noise was

heard.

3. Snaps, zippers and buttons can hit the side of

the drum and cause some noise.

ERROR MESSAGESERROR MESSAGES

ERROR MESSAGES

On Models T760 and T780, the LED window

displays an error message if a fault occurs during the

time the program is running. These error messages

are listed on page 18.

14

The washing will not dryThe washing will not dry

The washing will not dry

..

.

The machine only runs for 20 minutes.The machine only runs for 20 minutes.

The machine only runs for 20 minutes.

1. Check the main power fuse.

2. Make sure the dryer wasn’t overheated due to

lint blocking the filter, condenser unit or fan

housing.

3. Model T780: Overfilling. (The display shows

"Fault indication, filling.")

4. Possibly, the machine did not reach the measured

value of 1.8 mV within 15 minutes. This could

be due to:

a. Incorrect connection to single phase – too

low heating element power (720 or 600 W)

b. Incorrect connection of element to control

unit

c. Incorrect connection in element terminal

block

d. Humidity sensor not located in fan housing

e. Faulty humidity sensor

f. Heating element open circuit

5. Check the drive belt for the following:

a. Improperly located on the motor pulley.

b. Improperly located on idler pulley.

c. Twisted.

Overheat protection tripped even thoughOverheat protection tripped even though

Overheat protection tripped even though

lint filter and condenser unit have beenlint filter and condenser unit have been

lint filter and condenser unit have been

cleaned.cleaned.

cleaned.

1. Check for lint in the internal fan wheel.

2. Clean the air ducts and behind the element.

3. Check for a fault in the control unit

Overfilling fault indication, even thoughOverfilling fault indication, even though

Overfilling fault indication, even though

tank is emptytank is empty

tank is empty

..

.

Condenser water pump could be blocked or burned

out. If the pump is burned out, an associated fault

will be burned wiring in the control unit. Always

check first if the condenser water pump has burned

out before installing a new control unit.

The machine shows the maximum programThe machine shows the maximum program

The machine shows the maximum program

time fault indication.time fault indication.

time fault indication.

This indicates that the machine has been running

for the maximum time that the control unit is

allowed (> 3 hours) .

Several things could cause this. (It could be one of

these items or a combination.)

1. Check the main power fuse.

2. Make sure the dryer wasn’t overheated due to

lint blocking the filter, condenser unit or fan

housing.

3. Make sure the dryer isn’t incorrect connected to

a single phase, 15A.

4. Check that the external air isn’t restricted or

blocked, resulting in poor condensation.

5. A high ambient temperature + low heating

element power + low drying temperature could

result in poor condensation.

6. A low ambient temperature + low heating

element power + low drying temperature makes

it difficult to get the dampness out of the

clothes.

7. It’s possible the washing was spun dry at low

speed (i.e., less than 800 rpm), which would

make it difficult to dry the washing.

8. The washing possibly was taken out before the

program was complete and the machine was

loaded with a new batch of washing. In this case,

the control unit probably would not have time

to reset itself and the remaining program time

was added to the next drying cycle.

9. Check the humidity sensor, its wiring and

connections.

COMMON PROBLEMS

15

MOTOR (2/118/JU) 50 HZMOTOR (2/118/JU) 50 HZ

MOTOR (2/118/JU) 50 HZ

Part number: 80 618 24

Main winding: 23,8 Ω

Auxiliary-winding: 28,1 Ω

Voltage: 220/240 V

Current: 1,1 A, 270 W, 2850 rpm

The two-pole motor is connected directly to the

fan for internal air and via a gear to drive the drum.

On machines with condensers (T720/780) it also

drives the fan for external air.

CAPCAP

CAP

ACITACIT

ACIT

OROR

OR

Part number: 80 542 68

The capacitor is located on the motor and has a

value of 8µF.

CONDENSED WCONDENSED W

CONDENSED W

AA

A

TER PUMP (T720/T780)TER PUMP (T720/T780)

TER PUMP (T720/T780)

Hanning 25WHanning 25W

Hanning 25W

Part number: 80 638 09

Resistance: 111 Ω

The condensation water pump pumps the water

from the condenser housing at the rear of the machine

to the water tank.

RADIO INTERFERENCE FILRADIO INTERFERENCE FIL

RADIO INTERFERENCE FIL

TERTER

TER

Part number: 80 585 58

Leakage current: 230 V/ 50 Hz 0.315 mA

The filter eliminates radio interference generated by

the machine.

INDICAINDICA

INDICA

TOR LAMPTOR LAMP

TOR LAMP

Part number: 80 070 73

Current: 1.68 mA, 230 V, 50 Hz

The lamp indicates that the main power switch is

set to on.

THERMISTOR (T760/T780)THERMISTOR (T760/T780)

THERMISTOR (T760/T780)

Part number: 80 619 00

Resistance: 40-60 kΩ at 20°-30°C

The thermistor controls temperature regulation. If the

thermistor becomes short-circuited or disconnected

from the control unit, the program stops.

CONTCONT

CONT

ACTACT

ACT

OROR

OR

Part number: 80 091 48

Resistance: 2 kΩ

The contactor opens in case of overheating, when

the door is opened and at the end of the program.

THERMOSTTHERMOST

THERMOST

AA

A

TSTS

TS

T700T700

T700

Part number:

Low 80 619 46 (111° F/44°C)

Normal 80 014 45 (127° F/53°C)

Overheat 80 088 07 (239° F/115° C)

The thermostats are located in the fan housing. It

controls the temperatures for the automatic

programs and the time program up to 60 minutes.

The 239° F thermostat automatically disconnects

one of the heating loops if the temperature rises too

high. This thermostat is located next to the heating

element at the rear of the dryer.

T720T720

T720

Part number:

Low 80 144 44 (118° F/47° C)

Normal 80 560 29 (158° F/70° C)

This thermostat is located in the fan housing. It

controls the temperature for the automatic programs

and the time program up to 60 min.

OVERHEAOVERHEA

OVERHEA

T PROT PRO

T PRO

TECTION THERMOSTTECTION THERMOST

TECTION THERMOST

AA

A

TT

T

Part number: 80 084 87 (302° F/150°C

manual)

This thermostat stops the program if the

temperature rises too high. The unit has to be

manually reset. It is located next to the heating

element at the rear of the dryer.

HUMIDITY SENSOR (T760/T780)HUMIDITY SENSOR (T760/T780)

HUMIDITY SENSOR (T760/T780)

Part number: 80 618 55

The humidity sensor is used to control the drying

process. During operation the sensor output signal

is between 1 and 16 mV DC. Any other value causes

the program to stop.

OVERFILL PROTECTION (T720/780)OVERFILL PROTECTION (T720/780)

OVERFILL PROTECTION (T720/780)

Part number: 80 526 43

If both of the dryer containers are overfilled, the

program is stopped by a switch in the lower

container. The LED window indicates overfilling.

COMPONENTS AND MEASUREMENT VALUES

16

39

40

41

42

43

53

54

55

56

57

1+2

1

1+2

1

1+2

1

OFF

11

1

OFF

OFF1+2

1+2

1

1+2

1

1+2

1

OFF

21

2

OFF

OFF1+2

Low Temperature

Normal Temperature

1 = High Power Heater

2 = Low Power Heater

Temperature ˚C

ELECTRICAL CONNECTIONSELECTRICAL CONNECTIONS

ELECTRICAL CONNECTIONS

(See pages 8 and 9.)

DOOR SWITCHDOOR SWITCH

DOOR SWITCH

Part number: 50 531 07

The door operates a door switch. When the door is

opened, the program stops. If the door is opened

and closed during the program, the machine must

be restarted with the Start button.

BUZZER (T700/T720)BUZZER (T700/T720)

BUZZER (T700/T720)

Part number: 80 618 83

The buzzer sounds to indicate that the program has

finished.

COMPONENTS AND MEASUREMENT VALUES

PROGRAM CONTROL UNIT (T760/T780)PROGRAM CONTROL UNIT (T760/T780)

PROGRAM CONTROL UNIT (T760/T780)

The control unit contains microprocessors to control

the program, motor, heating element etc.

LED WINDOW LED WINDOW

LED WINDOW

(T760/T780) (T760/T780)

(T760/T780)

The LED window displays selected programs and

options and program information. (See page xx.)

PROGRAMMER (T700/T720)PROGRAMMER (T700/T720)

PROGRAMMER (T700/T720)

The programmer has mechanical setting points and

a motor with four-minute steps.

HEAHEA

HEA

TING SEQUENCE FOR MODELS T700 AND T760TING SEQUENCE FOR MODELS T700 AND T760

TING SEQUENCE FOR MODELS T700 AND T760

17

COMPONENTS AND MEASUREMENT VALUES

46

47

48

49

50

69

(64)

70

(65)

71

(66)

72

(67)

73

(68)

1+2

1

1+2

1

1+2

1

OFF

11

1

OFF

OFF1+2

1+2

1

1+2

1

1+2

1

OFF

21

2

OFF

OFF1+2

Low Temperature

Normal Temperature

1 = High Power Heater

2 = Low Power Heater

Temperature ˚C

HEAHEA

HEA

TING ELEMENTTING ELEMENT

TING ELEMENT

T700/T760 – 2620 WT700/T760 – 2620 W

T700/T760 – 2620 W

Part number: 80 618 33

Resistance: 66.7/25.7 Ω

The element has a maximum power rating of

2620W but consists of two loops of 1900W and

720W, which permits rewiring from 2620W to

1900W.

HEAHEA

HEA

TING SEQUENCE FOR MODELS T720 AND T780TING SEQUENCE FOR MODELS T720 AND T780

TING SEQUENCE FOR MODELS T720 AND T780

T720/T780 – 2500 WT720/T780 – 2500 W

T720/T780 – 2500 W

Part number: 80 637 71

Resistance: 79,7/25 Ω

The element has a maximum power rating of

2500W but consists of two loops of 1900 W and

600 W, which permit rewiring from 2500W to

1900W.

18

TEST PROGRAMTEST PROGRAM

TEST PROGRAM

The machine must be in its starting state (obtained

by pressing the main power button).

Short-circuit the outputs ST4-1 and ST4-2.

Start the test program.

T780: Start the condensation water

pump.

or wait for 60 seconds and the test

program will continue.

The program heats, increasing the temperature by

57° F (14° C) in a maximum of 10 minutes, then

allows it to cool for 5 minutes (testing that the

heating element is working).

The value detected by the humidity sensor can vary

according to the environment and on whether there

is wet clothing in the dryer.

ERROR MESSAGES – T760/T780ERROR MESSAGES – T760/T780

ERROR MESSAGES – T760/T780

Error messages will display in the LED window if a

fault occurs while a program is in progress. The table

below defines each possible error message. Once the

problem is resolved you may have to turn the power

off then on to clear the error message.

Message: Three hoursMessage: Three hours

Message: Three hours

The machine has run the maximum drying time

(three hours).

Possible solutions:

• Make sure both fuses are intact.

• Clean the lint filter.

• Make sure exhaust hose is clear (T760).

• Make sure the condenser (T780) is clear of lint

and dust.

• Clear message by turning the power off then on.

TEST PROGRAM AND ERROR MESSAGES

Message: Overflow (T780)Message: Overflow (T780)

Message: Overflow (T780)

The condensed water container is full. This container

is located at the top left corner of the dryer.

Possible solutions:

• Make sure the condensed water container is

empty. If draining into a drain pipe, make sure

the black rubber hose is not kinked or blocked.

The drain should not be higher than 40 inches

(1016 mm) from the floor.

• Make sure the condensation pump is not

blocked.

Message: SensorMessage: Sensor

Message: Sensor

This can appear if there are dry clothes in the drum

when the unit is started or if the humidity sensor is

not installed properly in the fan housing or control

unit. In this case, the machine will stop after 20 minutes.

It could also be caused by a fault in the humidity

sensor. If the message does not disappear when you

open the door, check the humidity sensor.

Message: ThermistorMessage: Thermistor

Message: Thermistor

The thermistor may have become disconnected or

have an internal fault. A serviceable thermistor has a

resistance of between 60 and 40 kW at 68° F–86° F

(20° C–30° C).

Possible causes and solutions:

• The thermistor is not properly installed in the

fan housing. In this case, the heating element

will remain switched in for as long as the

thermistor cannot detect the selected air

temperature. This can lead to an excessively high

air temperature in the drum.

• The filter could be blocked. In this case, the

overheat protection device is tripped and the

machine will stop. Once the unit is cool, press

the reset button on the rear of the machine to

start the machine.

• The incoming phase is missing.

– Error L1 – the machine will stop after 20

minutes. Low heating element power (720

or 600 W).

– Error L2 – the machine will not start.

Indicator lamp not lit.

– Error L3 – the machine operates but the

running time is too long (low heating

element power (1900W)).

• The fan motor stops after a few seconds.

Overheat protection trips, heating element and

control damaged.

Start

P1

P2

Amplified voltage value

from humidity sensor

Temperature measured

by thermistor

19

CONSUMPTION VALUES

T700/T720T700/T720

T700/T720

Before tumble drying, cotton garments should be

spun at 800 to 1600 rpm (long spin drying) in an

ASKO washer. Other garments (non-iron and

acrylic) should be spun at 800 rpm (short spin

drying) in an ASKO washer.

The following conditions apply for the consumption

values stated below:

Incoming air temperature: 68° F (20° C)

Incoming air humidity: 65%

Drying temperature: Normal ( )

Low ( )

Heating element power: T700 2620W

T720 2500W

T700 CONSUMPTION VALUEST700 CONSUMPTION VALUES

T700 CONSUMPTION VALUES

*Approximate number of pounds for each load size: Full = 11 pounds; Half = 5.5 pounds

** kWh values are based on 800 – 1600 rpm spins.

ENERGY

LOAD CONSUMPTION

PROGRAM FABRIC TEMP SIZE * (approx. kWh) **

1. Extra dry Cotton, linen Normal Full 3.8 – 3.3

2. Normal Dry Cotton, linen Normal Full 3.4 – 2.6

Permanent press, cotton/polyester Low Half 1.3 –

Acrylics, rayon, acetates Low Half 1.7

T720 CONSUMPTION VALUEST720 CONSUMPTION VALUES

T720 CONSUMPTION VALUES

*Approximate number of pounds for each load size: Full = 11 pounds; Half = 5.5 pounds

** kWh values are based on 800 – 1600 rpm spins.

ENERGY

LOAD CONSUMPTION

FABRIC SIZE * ( approx. kWh) **

Cotton, linen Full 3.1 – 2.4

Permanent press, cotton/polyester Half 1.2 –

Acrylics, rayon, acetates Full 1.7 –

20

T760T760

T760

Before tumble drying, cotton garments should be

spun at 800 to 1600 rpm (long spin drying) in an

ASKO washer. Other garments (non-iron and

acrylic) should be spun at 800 rpm (short spin

drying) in an ASKO washer.

CONSUMPTION VALUES

T760 CONSUMPTION VALUEST760 CONSUMPTION VALUES

T760 CONSUMPTION VALUES

*Approximate number of pounds for each load size: Full = 11 pounds; Half = 5.5 pounds

** kWh values are based on 800 – 1600 rpm spins.

The following conditions apply for the consumption

values stated below:

Incoming air temperature: 68° F (20° C)

Incoming air humidity: 65%

Drying temperature: Normal ( )

Low ( )

Heating element power: 2620 W

T780T780

T780

Before tumble drying, cotton garments should be

spun at 800 to 1600 rpm (long spin drying) in an

ASKO washer . Other garments (non-iron and

acrylic) should be spun at 800 rpm (short spin

drying) in an ASKO washer.

The following conditions apply for the consumption

values stated below:

Incoming air temperature: 68° F (20° C)

Incoming air humidity: 65%

Drying temperature: Normal ( )

Low ( )

Heating element power: 2500 W

T780 CONSUMPTION VALUEST780 CONSUMPTION VALUES

T780 CONSUMPTION VALUES

*Approximate number of pounds for each load size: Full = 11 pounds; Half = 5.5 pounds

** kWh values are based on 800 – 1600 rpm spins.

ENERGY

LOAD CONSUMPTION

PROGRAM FABRIC TEMP SIZE * (kWh) **

P1 Extra dry Cotton, linen Normal Full 4.1 – 3.4

P2 Dry Cotton, linen Normal Full 3.9 – 3.1

Permanent press, cotton/polyester Low Half 1.7 –

P3 Normal dry Cotton, linen Normal Full 3.4 – 2.6

Permanent press, cotton/polyester Low Half 1.5 –

Acrylics, rayon, acetates Low Half 1.7 –

P4 Iron dry Cotton, linen Normal Full 2.4 – 2.0

ENERGY

LOAD CONSUMPTION

PROGRAM FABRIC TEMP SIZE * (kWh) **

P1 Extra dry Cotton, linen Normal Full 3.8 – 3.1

P2 Dry Cotton, linen Normal Full 3.5 – 2.8

Permanent press, cotton/polyester Low Half 1.4 –

P3 Normal dry Cotton, linen Normal Full 3.4 – 2.6

Permanent press, cotton/polyester Low Half 1.5 –

Acrylics, rayon, acetates Low Half 1.7 –

P4 Iron dry Cotton, linen Normal Full 2.4 – 2.0

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Asko T700 Series User manual

Asko T700 Series User manual

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