DITTING KF 903 User manual

Operating instructions
64401 A 99/03 page 1 - 15

KF 903
KF 1203
KF 1403
TYPE
Voltage
Manuf. no.
Your service centre ...............................................
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Operating instructions
64401 A 99/03 page 2 - 15

Contents
page
1 General
1.1 Warranty information 3
1.2 Transfer declaration 4
1.3 General safety instructions 5
1.3.1 Information and safety symbols 6
2 Installation of coffee grinder
2.1 Description and installation of unit 6
2.2 How to use the coffee grinder 7
3 Care / Maintenance / Adjustment
3.1 Care and cleaning of the coffee grinder 8
3.2 Maintenance 8
3.3 Setting the scale (adjustment) 8
3.3.1 Basic setting (calibration) 9
3.3.2 Changing the scale setting (customer setting) 10
3.4 Replacing the grinding discs 11
4 Faults / action
4.1 Action in event of fault 12
4.1.1 Table of possible malfunctions 12
4.2 Repairs 13
4.2.1 Unblocking the discharge tube 13
4.2.2 Unblocking the grinding unit 13
4.2.3 Replacing the rubber bolt of discharge tube 14
4.2.4 Overload protector (optional for 1203/1403 models) 15
5 Customer service 15

Operating instructions
64401 A 99/03 page 3 - 15
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1 General
Dear Customer,
We congratulate and thank you for purchasing a DITTING quality product. These operating
instructions have been prepared to simplify your use of the coffee grinder. They contain
information, advice and instructions for the best use of your unit.
1.1 Warranty information
ALTHOUGH YOUR COFFEE GRINDER IS DISTINGUISHED BY A HIGH QUALITY AND SAFETY
STANDARD, DAMAGE TO MATERIAL OR RISK OF INJURY CANNOT BE EXCLUDED IF
OPERATED INCORRECTLY, USED IMPROPERLY OR MISUSED.
THE OPERATING INSTRUCTIONS WILL THEREFORE FAMILIARISE YOU WITH CORRECT USE
OF THE COFFEE GRINDER AND ASSIST YOU TO AVOID WRONG OPERATIONS. IF THE
ENCLOSED INSTRUCTIONS ARE FOLLOWED EXACTLY, YOU WILL AVOID DANGERS,
REDUCE REPAIR AND STOPPAGE TIMES AND INCREASE THE RELIABILITY AND SERVICE
LIFE OF YOUR UNIT.
TO ENSURE THAT YOU AND YOUR EMPLOYEES TAKE NOTICE OF THE CONTENTS OF THE
OPERATING INSTRUCTIONS AND FOR YOUR OWN SAFETY, WE WOULD ASK YOU TO
COMPLETE THE TRANSFER DECLARATION PRINTED ON THE FOLLOWING PAGE, DETACH
THIS ALONG THE PERFORATION AND RETURN IT TO YOUR DEALER.

Operating instructions
64401 A 99/03 page 4 - 15
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1.2 Transfer declaration
To ensure transfer of the operating instructions to final consumers
Note: The following declaration should be completed by the dealer and the purchaser. The purchaser
undertakes to return this declaration to the dealer. The purchaser thereby certifies that the dealer has
drawn his attention to the contents of operating instructions no. 64401, in particular to the relevant
safety instructions for use of the machine.
64401 A 99/03 page 4 - 15
Transfer declaration
(1) Type Machine no.
(2) Address of customer
(3) The machine specified in (1) was purchased by me. The complete operating
instructions were handed to me with transfer of the machine.
_______________________ _______________________
Signature of customer Place / date
(4) Date of transfer
(5) Address of dealer/importer
__________________________
Company stamp/signature
(6) The machine was handed to the customer in accordance with the guidelines of
the manufacturer.
Company stamp/signature if not identical with (5)
_____________________________ _______________________
Signature of customer service- Date
specialist


Operating instructions
64401 A 99/03 page 5 - 15

1.3 General safety instructions
 The operating instructions must be kept permanently at the place of operation of
the machine and if possible attached at the point of installation in the immediate
vicinity of the machine.
 The competent sales and service personnel must have read the operating
instructions before putting the coffee grinder into operation and be familiar with all
functions including action in the event of a fault.
 If customers themselves operate the machine, a notice must be placed clearly
visible in the immediate vicinity of the machine that customers must immediately
call the service personnel responsible in the event of a fault and not try to eliminate
the fault themselves by tampering with the machine.
 The machine must be placed in the sales areas so that the sales personnel
responsible can be reached by the customer without difficulty.
 Only original spare-parts must be used for repairs to the grinder. If spare-parts from
other manufacturers are used, the serviceability of the grinder may be impaired. In
addition, further injury to persons or material damage cannot be excluded.
 The grinder should be installed out of reach of children. Children and users must
on no account reach into the openings or come into contact with electrical
components.
 Only original grinding discs sharpened by DITTING must be used.
 Never reach into the hopper opening while the machine is running.
 Never touch electrical components with conducting objects, such as needles, pins,
cutlery, etc. !
 The emission value referred to the workplace is 76 dB(A).
 The machine must be electrically protected by fuses according to the nameplate
and the local regulations.

Operating instructions
64401 A 99/03 page 6 - 15

1.3.1 Information and safety symbols
Two information symbols are used in these operating instructions to emphasise important
comments in the text:
Information
This symbol indicates information containing important data concerning
efficient use. Non-observance can lead to faults.
Safety
This symbol indicates information which if not observed can lead to danger to
persons and/or substantial material damage. The safety instructions must be
followed without fail.
2 Installation of coffee grinder
2.1 Description and installation of unit
The KF 903/1003/1203/1403 coffee grinders are suitable for grinding various kinds of coffee.
The grinding fineness can be set from "Turkish fine" to "coarse" with an adjusting knob
provided with a scale. The KF 903/1003/1203/1403 coffee grinders are suitable for use in
medium-sized to large food stores, coffee companies and roasting plants. The simple
method of operation enables customers to use the grinder themselves in self-service stores.
Hopper
Pilot lamp
Filling cover
Adjusting knob
ON/OFF switch lever
Bag holding lever
Discharge tube
Name plate
Overload protector
(optional on 1203/1403)
The grinder must only be installed in dry areas!
Place the coffee grinder on a firm, level and non-slip base. Danger of tipping
and slipping on unstable surfaces. Before connecting the coffee grinder to the
mains supply, ensure that this supply corresponds with the data on the unit
nameplate.

Operating instructions
64401 A 99/03 page 7 - 15
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2.1.1 Switch on overload protector, if necessary (option).
2.2 How to use the coffee grinder
- Set the required grinding fineness on the
scale with adjusting knob (1).
- Open the filling cover (2) and place coffee
beans in hopper (3).
- Attach empty paper bag with bag holding
lever (4) onto discharge tube (5) . Release
paper bag (refer to drawing below).
Please ensure that the bag is opened fully prior attaching it onto the discharge
tube.
Reason: If the bag is not fully open, the ground coffee cannot run out properly,
which can result in a build-up and malfunction of the unit.
- Switch on motor with the ON/OFF switch
lever (6) (signal lamp lights).
- After the end of grinding switch off the
motor (6).
- Hold the bag tightly in the hand and tap the
discharge tube (5) clean by pulling and
releasing the bag holding lever (4), then
remove the bag.
Only grind whole coffee beans!
Coffee already ground must not be ground again!
1
3
2
4
5
6
4
5

Operating instructions
64401 A 99/03 page 8 - 15
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3 Care / maintenance / adjustment
3.1 Care and cleaning of coffee grinder
The coffee grinder must only be cleaned with a dry cloth.
Do not use an alkaline cleaning agent.
Do not spray coffee grinder with water and/or steam.
Reason: It can result in a short-circuit and therefore damage to the
unit. The use of alkalis can affect the flavour of the coffee.
The coffee grinder should be cleaned at least once weekly and always if soiled.
3.2 Maintenance
If the grinding quality is no longer of the required standard, the grinding discs must be
replaced.
The grinding discs should be inspected for wear after not longer than 12 months.
Periodic checking of the grinding quality and grinding discs must only be
performed by competent specialists and/or service personnel.
3.3 Scale setting (adjustment)
Setting of the scale (with the adjusting knob) makes the fineness of the ground coffee
correspond with the fineness set on the scale (marked).
Setting of the scale must only be performed by persons familiar with the unit
after carefully reading the following instructions.
The basic setting according to 3.3.1 should be made:
- following change of grinding discs
- following inadvertent displacement of the scale
setting
Change of scale setting as 3.3.2 should be performed:
- if the desired grinding fineness does not
correspond with the scale (adjusting knob)
- if an individual setting of the grinding fineness is
desired (customer setting)

Operating instructions
64401 A 99/03 page 9 - 15
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3.3.1 Basic setting (calibration)
If the basic setting is incorrect, friction can occur between the grinding discs,
resulting in excessive wear.
- Switch on motor.
- Unscrew screw (1) at centre of adjusting
knob (2) approx. 3 - 5 mm, do not remove.
- Pull out (3) adjusting knob (2) and turn 1/4
of a revolution anti-clockwise (4). Release
and engage (5) adjusting knob (2). (1
division corresponds to approx. 3 - 4 mm
on the scale.) Turn adjusting knob (2)
slowly clockwise to scale position 1 until
there is a sound of grinding discs rubbing
together (6).
- When the sound of grinding discs rubbing
together is heard, turn back while locked 10
mm anti-clockwise (7). Pull out (8)
adjusting knob (2) and turn clockwise to
scale position 1 (9). Release adjusting
knob (2) and engage (10).
- Retighten screw at centre of adjusting knob
(2).
Checking the setting:
When turning the adjusting knob from scale position 1 - 9 there must on no
account be a sound of metal parts rubbing together.
There must be no sound of grinding discs rubbing together at scale position 1
= excessive wear of grinding discs.
- Switch off motor
3
6
5
4
2 1
2
28
7
10
9

Operating instructions
64401 A 99/03 page 10 - 15
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3.3.2 Changing the scale setting (adjustment
for customer settings)
- Switch off motor.
- Unscrew screw (1) at centre of adjusting
knob (2) approx. 3 - 5 mm, do not remove.
- Set required number of divisions by pulling
out adjusting knob (2), turning in the
corresponding direction and re-engaging.
(1 division corresponds to approx. 3 - 4 mm
on the scale.)
 adjustment clockwise = coarser grinding
 adjustment anti-clockwise = finer
grinding
- Switch on motor.
- Retighten screw at centre of adjusting knob
(2).
Checking the setting:
When turning the adjusting knob from scale position 1 - 9 there must on no
account be a sound of metal parts rubbing together.
There must be no sound of grinding discs rubbing together at scale position 1
= excessive wear of grinding discs. If there is a sound, grinding must be set
more coarsely (see 3.3.1).
- Switch off motor.
21
2
2

Operating instructions
64401 A 99/03 page 11 - 15
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5
7
3
6
4
3.4 Replacing grinding discs
Before changing grinding discs switch off motor without fail and disconnect
power cable !
The grinding discs must only be replaced by persons familiar with operation of
the machine according to the following instructions.
- Switch off motor and pull out power cable.
Set adjusting knob (2) to coarse grinding
scale position 9.
- Dismantle cover lid (3) together with
hopper (4).
- Remove stationary disc flange (5) by
releasing screws (6) (see illustration) and
dismantle grinding discs.
- Dismantle lower grinding disc from rotating
disc flange (rotary flange 7).
All supporting (mating) surfaces of stationary disc
flange, rotating disc flange, grinding discs and
grinding case must be absolutely clean before
assembly.
Only in this way can perfect grinding be guaranteed.
- Screw new grinding discs to the cleaned
stationary and rotating disc flanges (5 + 7).
- For resharpened grinding discs the
shims if supplied should be inserted
between grinding disc and flange.
- Then re-assemble parts in reverse
sequence.
2

Operating instructions
64401 A 99/03 page 12 - 15
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- Plug in power cable, switch on coffee
grinder briefly. If it blocks or there is a
sound of metal parts rubbing together, the
scale setting must be adjusted according to
3.3.2.
- Retighten screws (6) of the stationary disc
flange. For this purpose the cover lid
including hopper (3 + 4) must be
dismantled again and then re-fitted.
- Perform basic setting (calibration)
according to 3.3.1.
4 Faults / action
4.1 Action in event of a fault
When operated by customers, it must be ensured that personnel are notified in
the event of a fault and that customers do not try to repair the machine
themselves.
The grinder must only be opened, inspected and dismantled by persons
familiar with the method of operation of the machine, who have previously
read these operating instructions through carefully.
4.1.1 Table with possible malfunctions
Fault Result Action (information text) Re.
Grinder cannot be
switched on
Signal lamp does not
light
Overload protector (option)
Check power cable, connection
and building fuses
Reset overload protector
4.2.4
Grinder jams, motor
does not start
Signal lamp lights Unblock discharge tube
Unblock grinding unit
4.2.1
4.2.2
Irregular grinding Check grinding discs for wear and
replace if necessary 3.4
Increased amount
of dust
Check grinding discs for wear and
replace if necessary 3.4
Bag slips or is no
longer held properly
Replace rubber bolt 4.2.3
6
3
4

Operating instructions
64401 A 99/03 page 13 - 15

6
5
3
4
4.2 Repairs
Switch off motor and pull out power cable before all major repairs requiring
work inside the machine, in order to avoid danger of injury while working on
motor while running and electric shock !
The electrical wiring diagram for this grinder is placed either:
- inside the bottom section of the housing panel or
- on the inside of the bottom plate
4.2.1 Unblocking discharge tube
- Switch off motor and pull out power cable.
- Unblock discharge tube from outside as far
as possible.
- Set adjusting knob (2) to coarse grinding
scale position 9 and switch motor on again.
This frequently unblocks the grinder and
extracts any foreign bodies in the grinding
unit.
- If the motor still does not run, continue
according to 4.2.2.
4.2.2 Unblocking grinding unit
- Switch off motor and pull out power cable.
Remove coffee beans from hopper (4) (use
a vacuum cleaner if necessary).
- Dismantle cover lid (3) together with
hopper (4).
- Remove stationary disc flange (5) by
releasing screws (6) (see illustration ).
2

Operating instructions
64401 A 99/03 page 14 - 15
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6
3
4
- Remove foreign bodies. Check grinding
discs, rotating and stationary disc flange,
etc. for damage.
All supporting surfaces of stationary disc flange, rotating disc flange, grinding
discs and grinding case must be absolutely clean before assembly.
Only in this way can perfect grinding be guaranteed.
- Then re-assemble parts in reverse
sequence.
- Plug in power cable, switch on coffee
grinder briefly.
If the coffee grinder should block or there is a sound
of metal parts rubbing together, the scale setting
must be adjusted according to 3.3.2.
- Retighten screws (6) of the stationary disc
flange. For this purpose the cover lid
including hopper (3 + 4) must be
dismantled again and then re-fitted.
- Perform basic setting (calibration)
according to 3.3.1.
4.2.3 Replacing rubber bolt of discharge tube
- Pull bag holding lever (1).
- Remove sleeve screw (2) with adequate
wrench (no. 17).
- Replace old rubber tube (3) with new one.
- Re-tighten sleeve screw (2) with adequate
wrench and release bag holding lever.
1
2
3

Operating instructions
64401 A 99/03 page 15 - 15

4.2.4 Overload protector (option, only available for KF-1203/1403)
- Set ON/OFF switch to OFF position.
- Reset overload protector (toggle switch at
rear side) to position 1.
- The coffee grinder is again ready for
operation.
5 Customer service
If it is found during maintenance that the grinding discs must be resharpened/replaced or
other repairs must be made, the nearest service centre (see page 1) should be contacted or
direct connection made with the factory.
New grinding discs, spare-parts and accessories (also at intermediate times) can be ordered
from our customer service or the relevant agent.
The grinding discs can be resharpened
once or twice at the factory.
Data such as manufacturing number and type of power supply as specified on the
nameplate of the coffee grinder should be stated on orders for grinding discs, spare-parts
and accessories to ensure rapid and efficient advice and delivery.
Ditting Maschinen AG
/lQJJHQVWUDVVH
CH-8184 Bachenbülach
Switzerland
Phone: [phone]
Fax: [phone]
e-mail: [email protected]
www.dittingswiss.ch
Subject to technical modification.