HORECA | GASTRO GRI N DER

Operating Instructions
K30 TWIN Espresso Grinder
Grind-on-Demand“
”
S O F T WARE:
NEW ime change &
Easy t mode
barista r 5.3
pte
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The professional art of grinding

since 1924
HORECA | GASTRO GRI N DER

Dear customer / service personnel

the Double Espresso Grinder „K30 TWIN” is a fully automatic

espresso coffee grinder of the proven MAHLKÖNIG quality.

We have developed this product with over 80 years of experience

in the manufacture of coffee grinders assuring you of high quality
grinding of all kinds of espresso and other types of coffee beans.
Espresso as the base of various coffee specialities requires a very
precise grind. With the „K30 TWIN“ you can now grind two differ-
ent kinds of espresso (like decaf and regular) simultaneously in one
machine.

Read through and observe the operating instructions, so you and

your customers will thoroughly enjoy the ”K30 TWIN”. Follow the
safety instructions at all time and also advise your personell.

Please store the instructions in a safe place. If anything is unclear or

additional information is required, please contact your authorized
dealer or us as the manufacturer. We will be pleased to advise you
further.

We wish you unlimited pleasure and success with our product

MAHLKÖNIG GmbH & Co. KG

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Table of Contents
1. Safety 4 6. Cleaning 18
1.1 Symbols 4 6.1 Cleaning with GRINDZTM Grinder Cleaner 18
1.2 Safety Instructions 4 6.2 Cleaning the Drip Tray and the Hoppers 19
1.3 Purpose of Use 5 6.3 Cleaning the Grinder Placement Surface 19
1.4 User Requirements 5 6.4 Cleaning the Grinder Casing 19
2. Technical data 5 7. Maintenance and Repair 19
7.1 Grinding fineness adjustment with the grinder switched ON 19
3. Description 6
7.2 Taking off the grinder cover 20
4. Set-up and Initial Adjustments 7 7.3 Basic Adjustment of The Interior Grinders 20
4.1 Place of installation 7 7.4 Cleaning of the Grinding Mechanism 21
4.2 Locking in the hoppers 7 7.5 Grinding Disc Exchange 21
4.3 Electrical Installation 7 7.6 Removal of The Integrated Grinder 21
4.4 Adjustment of the portafilter rests 7
8. Trouble Shooting For Operating Faults 21
4.5 Adjustment of the cleaning alarm 8
8.1 Safety Devices of the Grinder 21
5. Operation 8 8.2 Operating Fault 22
5.1 Instructions for the first grinding steps 8 8.3 Alarm Signals Showing in The Display 23
5.2 Operating the grinder 8
9. Spare Parts 25
5.3 Grind time adjustment 9
5.4 Interruption of grinding (break-function) 11 10. Wiring Diagram 26
5.5 Software Menu 11 11. Certificate 29
5.6 Describtion of the software chapters 17
12. Warranty Conditions 29

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1. Safety Always remove the electrical plug from the outlet prior to remov-
ing the hopper or conducting maintenance or cleaning work on the
Please read carefully and observe the following grinder.
safety instructions. Failure to do so can result in
damage to the grinder and danger to the user. Never operate a grinder with a damaged electrical cord. Inspect the
grinder regularly for damages of the electrical cord, plug, etc.
1.1 Symbols
The following two symbols are used in these operating instruc- Any required repairs may only be conducted by authorized service
tions: personell. For this reason, please contact a customer service repair
facility, your dealer or us directly as the manufacturer.
Safety Instruction:
Imminent accident danger if you fail to observe. Do not exceed the maximum allowable continuous grinding time
of 20 min. Afterwards, allow the grinder to cool off before the next
operation. Do not exceed the maximum allowable running cycle of
General Instruction: 4 sec. ON, 6 sec. OFF (6 double shots per minute, S3 40%) for 230V
Failure to observe can result in damage to the / 50Hz, and 6 sec. ON, 15 sec. OFF (4 double shots per minute, S3
grinder and optimum operation cannot be guar- 25%) for 115V / 60Hz.
anteed.
Do not make any modifications or alterations to the grinder. The
1.2 Safety Instructions manufacturer assumes absolutely no liability for damages occur-
ring from failure to observe these instructions.
Only whole roasted coffee beans may be ground in the K30 TWIN!
Children cannot recognize the dangers that can exist in the opera-
When unpacking please inspect whether the power supply (volt- tion of electrical grinders. For this reason never leave children unsu-
age) complies with the grinder voltage on the manufacturer’s pervised with electronic appliances such as this grinder.
name plate at the bottom of the grinder.

Never operate the grinder in damp or wet sur-

roundings. Never operate with wet hands

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2. Technical Data
1.3 Purpose of Use
Type K30 TWIN
Only whole roasted coffee beans may be ground in the K30 TWIN
grinder. Pay attention to use only clean and unground coffee. Never Voltage/Frequency 200-230V / 50/60Hz
use the grinder to grind other products or objects. 240V / 50Hz
100-115V / 50/60Hz
1.4 User Requirements Rotation
No special requirements are necessary for the user of this grinder.
230-240V 1420 rpm
It is nevertheless a prerequisite that these operating instructions
have been carefully read and understood and that all instructions 110-115V 1640 rpm
provided are observed. In addition safety-conscious operation is ex- Sound Emission
pected. Idle Operation 65 dB
Operation 85 dB
Pre-Fuse 16 A-slow
Motor Fuse 5x20 10A slow
Overload Circuit Breaker
200-240V 4A T
110-115V 7A T
Max. Permissible Running 230V:4secON,6secOFF
Time of the Grinder 115V: 6 sec. ON, 15 sec.
OFF
Dimensions in mm B 368, H 590, T 300
Weight 26 kg (57.3 lbs)
Hopper Capacity 2 x 750 g (2 x 1.65 lbs.)
(Please request technical data for other voltages and frequencies from the manufac-
turer or dealer)

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3. Description
The main components and operating elements are pictured in the
illustration.

Pos. 1 Hopper with lid and finger protection

Pos. 2 Lock screw for hopper
Pos. 3 Grinding fineness adjustment 1

Pos. 4 Brake for grind adjustment

Pos. 5 Grinder cover with lock screw
Pos. 6 Display
Pos. 7 Pre-selection button „single espresso“
Pos. 8 Pre-selection button „double espresso“
Pos. 9 „Program“-button 2
4
Pos. 10 Spout 5
3

Pos. 11 Portafilter mounting

Pos. 12 Portafilter rest 6
Pos. 13 Fastening screw for portafilter rest 9
7
Pos. 14 Start / Stop switch 8
Pos. 15 Drip tray (with hopper slides underneath)
Pos. 16 Main switch (at the back of the grinder) 10

11
14 13

12
16

15

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4. Set-up and Initial Adjustments 4.3 Electrical Installation

Prior to plugging in observe the following safety instructions:
You have received your grinder in operating condition. Now you
only need to place it in a safe place and connect it to the main pow- Protect your device with separate pre-fuses (not
er socket. Proceed as follows: included in the scope of delivery) according to
the information provided under point 2 „Techni-
cal Data“
4.1 Place of Installation
Place the grinder on a level, vibration-free surface. Make sure that the pre-fuse is not overloaded
by other devices (e.g. fan heaters, deep freezers,
Never operate the grinder in moist, or even etc)
worse, in wet surroundings!
Check whether the main voltage and frequency
correspond to the information on the rating
4.2 Locking in the hoppers plate underneath the grinder.
Set the hopper into the bayonet socket. Grab the hopper with both
hands and turn it carefully in clockwise direction, until the bayonet Insert the plug into the corresponding grounded outlet.
locks in.
4.4 Adjustment of the portafilter rests
Always loosen the grind adjustment brakes and The grinder is designed so that all different portafilters from vari-
turn both adjustments to fine (setting 0) when ous espresso machines fit into the rest for hands-free grinding op-
locking in the hoppers. Turning the grind adjust- eration.
ment ring repeatedly without loosening the
brake could damage the interlock.
4.4.1 Keep the grinder switched off. Slightly loosen the allen screws
(pos. 13) with the included allen screw driver size 3mm and pull
Fasten the lock screw for the hopper (pos. 2) to prevent the hoppers
down the portafilter rest (pos. 12).
from unauthorized removal.
4.4.2 Push the portafilter of your espresso machine onto the start/
stop switch between the portafilter mounting (pos. 11) and the
rest (pos 12). Now push up the portafilter rest until the portafilter
holds on its own. Now refasten the screws.

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The adjustment is correct when the portafilter independently re-

mains in the mounting. Observe the safety instructions under 1.2!

In case the portafilter rest does not fit your

espresso machine’s portafilter, please contact Never exceed the maximum permissible con-
your local dealer. He will arrange a different tinuous operating cycle of 4 sec ON, 6 sec OFF
portafilter rest. (S3 40%). Also do not exceed the maximum al-
lowable continuous grinding time of 20 min. Af-
4.5 Adjustment of the cleaning alarm terwards, allow the grinder to cool down before
The software of the K30 TWIN has an integrated cleaning alarm the next operation.
which is activated at a pre-set amount of shots taken. This alarm
should remind you of cleaning the grinder regularly in order to in-
crease the discs‘ lifetime. 5.2 Operating the grinder

MAHLKÖNIG recommends: The cleaning limit 5.2.1 Switch on the grinder at the back of the casing (pos. 16).
should be set to the amount of shots that are
ground per week. (For the set-up of the limit 5.2.2 Open the hopper and pour whole roasted espresso beans into
and for resetting the counter after cleaning see the hopper.
chapter 5.5.9)
Never pour in coffee powder which would result
into immediate blocking of the discs.
5. Operation
Once the grinder is set up and ready to operate a grinding test
should be carried out.
5.2.3 Adjust the grinding fineness by pulling the grind adjustment
interlock (pos. 4) and turning the ring (pos. 3) including the hopper
5.1 Instructions for the first grinding steps
to the desired position. Note that „0“ is the finest setting and „10“ is
the coarsest. Let go and re-lock the brake to fix the setting.
Only use the K30 TWIN espresso grinder for
whole roasted coffee beans.

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5.2.6 Push your espresso machine’s portafilter into the partafilter

mounting (pos. 11/12) so that the grinding process starts.
coarse
The first operation will not result in the desired
amount of espresso because the grinder has
fine
to fill up with ground coffee. The second shot
should give the correct result.
Test runs have proved grind adjustments 1 – 4
to be the most common settings for espresso
depending on the origin, roast and blend. This 5.2.7 Now brew a test portion of espresso using your machine. If
should be taken into account when adjusting the result is unsatisfactory, alter the adjustment again by varying
the grinder for the first time. the grinding time and grinding fineness until the best coffee results
have been achieved.

5.2.4 For the first test run the grinding time settings are pre-pro- 5.3 Grind time adjustment
grammed for single shots to 2.0 sec and for double shots 4.0 sec. To adjust the time of grinding and therefore amount of ground cof-
fee please see the following overview:

5.2.5 Choose the single or double pre-select-button according to

your portafilter. The LED shows which button is selected.

Single espresso left grinder Single espresso right grinder

Double espresso left grinder

Double espresso right grinder

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Quick time change: 5.4 Interruption of grinding (break-function)

press +
hold let go If the grinding process is interrupted before the set grinding time has
Single Shot GRINDER No.1 MAHLKOENIG
Left Side .
DOS N° 1 2.000s
save

GRINDER READY
expired, the LED in the active pre-selection button flashes. The grind-
left
(ZEIT blinkt)
left ing process can be re-started by pushing the portafilter back into the
mounting. The missing quantity is ground. If this is not desired push
0,05 sec. the pre-selection button and the entire set grinding quantity or grind-
rechts ing time is available once again.
0,05 sec.
rechts
5.5 Software Menu
press+
hold let go The following overview shows the handling of the K30 TWIN’s soft-
Double Shot GRINDER No.1 save MAHLKOENIG
Left Side .
DOS N° 2 4.000s
(ZEIT blinkt)
GRINDER READY ware.
left left

0,05 sec.
rechts

0,05 sec.
rechts
press +
hold let go
Single Shot GRINDER No.2 save
MAHLKOENIG
Right Side .
DOS N° 1 2.000s GRINDER READY
(ZEIT blinkt)
right right

0,05 sec.
rechts

0,05 sec.
rechts
press +
hold let go
Double Shot GRINDER No.2 save MAHLKOENIG
Right Side .
DOS N° 2 4.000s GRINDER READY
(ZEIT blinkt)
right right

0,05 sec.
rechts

0,05 sec.
rechts
press

Barista Mode . + manual dosing / no timer

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(ZEIT blinkt)
left or right
HORECA | GASTRO GRI N DER

5.5 Software Menu

The following overview shows the handling of the K30 TWIN’s software.

PROG. Enter (go into a lower software menu level) P5

go foreward in menu P8
right

go back in menu P9
right

decrease values in menu ( - button) P6

left

increase values in menu ( + button) P7

left

Display

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Main Menu Sub Menu

press press press press
press press
MAHLKOENIG 1) PROGRAM GRINDER N° 1 GRINDER N° 1 GRINDER N° 2 GRINDER N° 2
GRINDER READY PROG. DOSE PROG. DOSE N° 1 2.000s DOSE N° 2 4.000s DOSE N° 1 2.000s DOS N° 2 4.000s
(left grinder - single shot) (left grinder - double shot) (right grinder - single shot) (right grinder - double shot)
right right right right
press press press press

PROG. PROG. PROG. PROG.

time blinking time blinking time blinking time blinking

press

Sec. Sec. Sec. Sec.

left left left left
right

Sec. Sec. Sec. Sec.

left left left left
press press press press

PROG. PROG. PROG. PROG.

save save save save

press press press press

press GR1: SHOTS1 GR1: SHOTS2 GR2: SHOTS1 GR2: SHOTS2
2) DOSE COUNTER
PROG. 0000002 0000120 0002123 0000020
(left grinder - 2 single shots) (left grinder - 120 double shots) (right grinder - 2123 single shots) (right grinder - 20 double shots)
right right right right
press
counter volumes represent examples

right

press
press
3) ALARM / RECORDS NO RECORDS
PROG.
right

or ALARM RECORDS e.g.

press press

GRINDER 1 GRINDER 1
BLOCKED FAN TOO SLOW
right right

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Main Menu Sub Menu

press press press
press
4) LANGUAGE, REL 4-1) LANGUAGE 4-2) SW RELEASE 4-3) SERIAL N°
SW, SERIAL N° PROG. ENGLISH 0.07 1234
right right right
press

PROG.

LANGUAGE BLINKING

press
CHANGE LANGUAGE
left
right
CHANGE LANGUAGE
left

press

PROG.

SAVE

press press press press

press
5) RESET RESET RESET RESET RESET
only service menu PROG. GRINDER N° 1 GRINDER N° 2 ALARM RECORDS CLEANING COUNTER
right right right right
press press press press

PROG. PROG. PROG. PROG.

RESETTING RESETTING RESETTING RESETTING

press GRINDER N° 1 GRINDER N° 2 ALARM RECORDS CLEANING COUNTER

set dose counter set dose counter delete all set cleaning counter
of left grinder back to 0 of right grinder back to 0 alarm records back to 0
right

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Main Menu Sub Menu

press press press
press
6) SETUP 6-1) CLEANING AL. 6-2) CLEANING AL. 6-3) SERIAL N°
only service menu PROG.
NO 1000 1234
right right right
press press only changable
in factory with super pin
PROG. PROG.

NUMBER blinking
6-1) CLEANING AL.
press NO YES

left
right YES
left
or

left
NO
press
left
press PROG.

PROG.
SAVE

SAVE

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Main Menu Sub Menu

press press press press
press
only service menu 7) TEST 7-1) INPUT, DIP 7-2) TRIAK, RELAY 7-3) BUTTONS 7-4) DISPLAY
PROG. SWITCH, FAN CURRNET
right right right right
press press press press

PROG. PROG. PROG. for P5 PROG.

SI C SW1 SW2 MC1 GR1=OFF RL=ON KEYB=

OFF OFF OFF OFF I = 4.89A (checking the function of the LCD
buttons with numbers) (testing all display dots)
press
SIC: Lid safety switch press
SW1: switch left grinder press press
SW2: switch right grinder

right
MC1: 230V / 115V for P6
ON: Contact closed right
left
press left
activates / deactivates LCD
press
the triak of the grinder

right press for P7

press
left
F 1 (HZ) F2 (HZ)
ON 120 OFF 0 left press
right
activates / deactivates for P9
F1: FAN 1
(HZ): Frequency of F1 the relayof the grinder
LED
F2: FAN 2 right
(testing all LED’s)
(HZ): Frequency of F2
for grinder 1 press
press
press
right or for P8
right
right for grinder 2
right
right END
BUZZ
(testing the alarm)

press

right

press press
7-5) POWER 7-6) RS232
SUPPLY INTERFACE
right right
press press

PROG. PROG.

V-SUPPLY = 27.3V testing the RS 232

Interface

right right
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Main Menu Sub Menu

press
press
only service menu 8) CHANGE PASSWORD
PASSWORD PROG. XXXXXX
right

the first X blinking

left

press

left
press
right

right

for next number

and
for saving in the end

SAVE

press press
press
9) CLEANING COUNT. 9-1) CLEANING AT 9-2) RESET
RESET PROG. 1000
right right
press press

PROG. PROG.

NUMBER blinking RESETTING

CLEANING COUNTER
press

left

right

left
press

PROG.

MAHLKOENIG
GRINDER READY SAVE

END MENU 16
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Pressing the PROG-button once enters the user 5.6.3 Alarm Records
menu (menu chapters 1-4 and 9). Alarms are saved in the order of appearance (the last one to appear
first in line). 20 alarms can be saved, the 21st overwrites the oldest.
Pressing the PROG-button for appr. 5 seconds For a detailed describtion of all alarms with causes and remedies
and typing in the password enters the service please see chapter 8.3.
menu (menu chapters 1-8).
5.6.4 Language, Software Release, Serial Number
Password: Change the language of the menu (Italian, English, French, German,
Until serial number 18571: „666 666“ (software version V0.12) Spanish). Read the software release number and serial number of
From serial number 18572: „000 000“ (software version V0.13) the grinder.

5.6 Describtion of the software chapters 5.6.5 Reset (only in the service menu)
All counters and alarm records can be set back to Zero or deleated
5.6.1 Program Dose respectively.
Adjust and change the grinding time for single and double dosing
for both grinders. 5.6.6 Setup (only in the service menu)
Set up the cleaning alarm:
GRINDER N°1 = left grinder • Switch ON or OFF the cleaning alarm.
GRINDER N°2 = right grinder • Set the Cleaning Alarm Limit, which is the max. allowable limit
that can be set in menu point 9.
DOS N°1 = single espresso
DOS N°2 = double espresso 5.6.7 Test (only in the service menu)
Check the functionality of the different electrical components and
The time can be set in 0.005 sec steps. A change of 0.1 seconds adds functions in the grinder. This menu point should help service part-
or takes away approximately 0.5 gram of coffee. (This reference val- ners to locate potential malfunctions.
ue can vary for different coffees and roasting degrees.)
5.6.8 Change Passwort (only in the service menu)
Press and hold the PROG-button after changing the time to quick- Change the passwort to your individual 6-digit number. (see chap-
exit the menu. The display will show „MAHLKOENIG GRINDER ter 5.4)
READY“.

5.6.2 Dose Counter

Read the counters for single and double shots for both grinders.

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5.6.9 Cleaning Counter Reset Remove all beans from the hopper or take the hopper slides from
Set the cleaning counter to the appropriate amount of shots so under the drip tray and push them into the slots in the bayonet
that the alarm reminds the user to clean the discs on a regular ba- adapter. Remove the lock screw. Now you can take off the hopper.
sis. (see chapter 4.5)
When taking off the hopper ALWAYS release the
Set the counter back to Zero after cleaning the grinder. grind adjustment brakes and turn both rings to
coarse. This will block the adjustment. Turning
6. Cleaning the grind adjustment ring repeatedly without
We recommend cleaning your espresso grinder regularly. Only use loosening the brake could damage the interlock.
food-safe cleaning detergents.
Grab the hopper with both hands and turn it anti-clockwise until
Always pull the main plug from the socket be- it is released by the bayonet. Empty the input chute of all espresso
fore carrying out maintenance or cleaning work beans and vacuum out the disc casing.
on the grinder.
Also empty the hopper and relock it onto the grinder. Take off the
hopper slide.
Observe the safety instructions under 1.2.
When engaging the hopper into the bayonet
ALWAYS release the grind adjustment brakes
Do not let any foreign object fall into the grind- and turn both rings to fine. This will block the
ing mechanism. adjustment. Turning the grind adjustment ring
repeatedly without loosening the brake could
damage the interlock.
6.1 Cleaning with GRINDZTM Grinder Cleaner
We recommend cleaning your espresso grinder once a week with Drop the recommended dose of GRINDZ (35 - 40g) into the empty
our GRINDZ™ Grinder Cleaner. grinder hopper. You can also use the cap of the jar for dosing. A full
cap will yield between 35 - 40 grams.
MAHLKÖNIG recommends: The cleaning limit Turn the fineness adjustment to coarse and operate as if grinding
should be set to the amount of shots that are coffee beans.
ground per week. (For the set-up of the limit
and for resetting the counter after cleaning see Once complete, we recommend passing twice as much coffee
chapter 5.5.9) through to purge any residue.

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Set the cleaning counter back to Zero, if the 7. Maintenance and Repair
grinder was cleaned due to the cleaning alarm.
(see chapter 5.5.9) Any required repairs may only be conducted by
authorized specialist personnel. For this reason,
6.2 Cleaning the Drip Tray and the Hoppers please contact a customer service repair facility,
The hoppers, their lids and the drip tray (without hopper slides) can your dealer or us directly as the manufacturer.
be cleaned in a dishwasher or in a bath of water with dish deter-
gent. Always pull the main plug from the socket be-
fore carrying out maintenance or cleaning
Depending on the dish washing detergent the work on the device!
transparent plastic parts of the hopper can
slightly fade out. Inspect the grinder regularly for damage, par-
ticularly to the electrical cable, plug,
6.3 Cleaning the Grinder Placement Surface etc.
6.3.1 Pull out the main plug. 7.1 Grinding fineness adjustment with the grinder switched ON
6.3.2 Take off the drip tray.
Depending on the wear and tear of the grinding discs or after open-
6.3.3 Tilt the grinder to one side and clean the area on which it ing the interior grinder the setting of the finest grind adjustment
stands and the bottom of its base. Both surfaces must be dry and has to be checked. Proceed as follows:
free of oil and grease.
7.1.1 Set the grinding fineness adjustment to „0“.
6.3.4 Reposition the grinder and re-insert the drip tray.
7.1.2 Close and remove the hopper.
6.4 Cleaning the Grinder Casing
Clean the outside of the casing from time to time using a damp 7.1.3 Remove the remaining beans from the filler shaft and vacuum
cloth. out the grinder casing.

Be carefull of sharp edges when cleaning. There 7.1.4 Remove the sealing ring from the filler shaft.
is a risk of injury.
7.1.5 Loosen – do not unscrew – the adjusting screws with the allen
key size 2.5mm.

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7.1.6 Insert the adjusting handle (service tool) into the filler shaft. 7.1.14 Only remove the portafilter once the grinding process has
The adjusting handle must engage in the slot into filler shaft’s been completed. Repeat approximately twice in order to fill the
transverse bar. grinder casing with the re-adjusted ground coffee.
7.1.7 Hold the adjusting handle firmly and push the portafilter into 7.2 Taking off the grinder cover
the portafilter mounting until the grinder switches on. Grind or take out all coffee bean residues. Switch off the grinder
and pull the main plug. Turn both grind adjustment rings to coarse
7.1.8 Whilst the grinder is running, turn the adjusting handle clock-
wise until a slight ringing sound becomes audible. Now turn the and fix the brakes. Loosen the lock screw in the front with the allen
adjusting handle slightly anti-clockwise until no further ringing screw driver size 2mm. Carefully lift the grinder cover upwards.
sound can be heard.
7.3 Basic Adjustment of The Interior Grinders
It is important to ensure that no grinding disk The basic adjustment to a moderately fine setting has been carried
„rattling“ can be heard at the finest setting! out in the factory using espresso beans. The following markings
Otherwise the service life of the discs will be have been made on the grinding mechanism (interior):
significantly reduced.
Red mark 1: Basic adjustment 0, finest setting and minimum grind-
7.1.9 Tighten the adjusting screws and remove the adjusting han- ing disc spacing
dle from the filler shaft.
Red mark 2: Basic factory setting and also the position for install-
7.1.10 Insert the sealing ring again. If the sealing ring is damaged it ing and removing the lid, in order to achieve the finest setting after
must be replaced. positioning the lid.

7.1.11 Replace the hopper and allow it to engage in the bayonet

and replace the lock screw. Open the hopper slide.

7.1.12 Reset the desired grinding fineness.

Red mark 1 Red mark 2
7.1.13 Push your espresso machine’s portafilter into the portafilter
mounting (pos. 11/12) until the grinding process is switched on.

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7.6 Removal of The Integrated Grinder

Never rotate the grinding discs clockwise fur- For safety reasons the interior grinders are fixed to the casing’s
ther then the red mark 1, as the grinding discs ground plate.
may otherwise be damaged.
7.6.1 Disconnect the main plug. Close and remove the hoppers.
7.4 Cleaning of the Grinding Mechanism Place the grinder on its back and unscrew the hex nuts of the mo-
After opening the grinder cover the grinding mechanism with the tors (three each). Store the nuts and washers in a safe place. Re-
discs can be vacuumed. Check for foreign objects in the grinding position the grinder on its rubber feet
gear.
7.6.2 Take off the grinder cover (see chapter 7.2)
Do not change any grinder settings. The discs
could be damaged when re-assembling the 7.6.3 Release the motors‘ plug-in connectors. Carefully pull the inte-
grinder. grated grinder out of the casing.

Carefully vacuum the grinder casing. Take care not to damage any Do not change any grinder settings. The discs
cables. could be damaged when re-assembling the
grinder.
7.5 Grinding Disc Exchange
Grinding disc replacement should only be carried out by autho-
rised specialists or a customer service centre. The „Repair manual 8. Trouble Shooting For Operating Faults
K30 TWIN grinding disc replacement and basic adjustment“ can be
downloaded for replacing grinding discs. 8.1 Safety Devices of the Grinder

Grinding disc replacement may also be carried out using a replace- Thermal overload circuit breaker
ment (AT) integrated grinder. To do this, order an AT integrated The motor of the grinder is protected by a thermal overload circuit
grinder. On receipt of the AT integrated grinder, remove your inte- breaker which interrupts the motor‘s electric circuit in the event of
grated grinder from the K 30 TWIN according to chapter 7.6 and electric overload. The display shows an alarm signal. Pressing the
install the AT integrated grinder into the K 30 TWIN. Return your old PROG-button or the right single shot button releases the grinder
integrated grinder in the packaging. back to operation mode.

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8.2 Operating Fault

The user has no influence whatsoever on this
Defect Cause Remedy
circuit breaker. If the circuit breaker trips repeat-
edly an authorised service partner must be con- The grinder hums The spout is Set grinding fineness to
sulted as the motor‘s winding may be damaged. but does not clogged. „coarse“ and trigger the
grind. grinding process. The grind-
Motor protector er will then grind itself free.
A thermo switch is built into the motor’s winding to block the mo- Afterwards, return the set-
tor in case of overheating. The display shows an alarm signal. Let ting to the desired grinding
fineness.
the motor cool down for approx. 30 minutes. The switch will con-
nect automatically when the winding is functional again. Grinding is set too Turn the grinding fine-
fine. ness setting to the right,
Magnetic switch in the grinder’s lid to „coarse“, and trigger the
The lid of the grinder is secured with a magnetical switch. The grinding process. The grind-
grinder only operates with the lid closed. In case the grinder cover er will then grind itself free.
is opened with the main switch ON there will be an alarm signal in Afterwards, return the set-
ting to the desired grinding
the display (chapter 8.3). Only closing the cover and pressing the
fineness.
PROG-button will clear the alarm.
A foreign object Clean the grinding mecha-
is in the grinding nism as described and re-
mechanism. move the foreign object.
Observe the safety instruc-
tions!

The grinder does The grinding time Reset the grinding time.
not grind, the dis- is set to 0.
play is lit, single
cup is pre-select-
ed.

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Defect Cause Remedy 8.3 Alarm Signals Showing in The Display

Several sensors have been built into the grinder in order to control
The grinder does The main plug is Insert the main plug into operation and to protect the motor and the grinding gear. The fol-
not start, the not inserted. the socket. lowing alarm signals can show in the display:
display is not lit.
Alarm Record Cause Correction
The pre-fuse has Check the pre-fuse. Restore
tripped. the pre-fuse to its initial LOSS DATA • Saved data was • Press PROG-button. Grind-
state or replace it. Deter- lost. ers are not blocked.
mine whether other de-
vices are connected to this GRINDER X • Current User:
fuse. BLOCKED consumption • Press PROG-button. The
In the case of other malfunctions or continued faults, please higher than other grinder can be used
contact your dealer or your authorised customer service centre. limit. again.
• Motor blocked. • Turn grind adjustment of
• Foreign object/ blocked grinder to coarse.
beans blocking Switch off and back on
the grinder. the grinder, start grind-
• Jammed spout. ing, the grinder grinds
• Exploring coil itself free. Reset the grind
on power board adjustment to the desired
malfunction- espresso setting.
ing. • Clean the spout. Take off
the cover and check the
interior grinder’s spout
(position of flat spring).
• Interchange the grinders‘
plugs at the power board
to determine the cause of
the malfunction. (grinder
or board)
• Check current consump-
tion in service-menu point
7. (desired value at idle
operation: I < 3,5A
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HORECA | GASTRO GRI N DER

Alarm Record Cause Correction Alarm Record Cause Correction

Service technician: GRINDER X • Fan runs • Check fan for foreign

• Test exploring coil on FAN TOO SLOW with reduced objects.
power board. If applicable frequency for • Interchange the fans‘
change power board. more than plugs at the processor
three seconds. board to determine the
TRIAC GRIND- • Triac not User: • Foreign object cause of the malfunction.
ER X OUT OF interconnected • Press PROG-button. The is blocking the (fan or socket)
WORK (optical coupler other grinder can be used fan. • Exchange fan.
defective). again.
• Grinder’s plug • Check grinder’s plug for CLEAN GRIND- • Cleaning coun- • Press PROG-button. Grind-
not connected. correct position. ER X ter has reached ers are not blocked.
• Fuse defective. • Check capacitors‘ connec- the pre-set • Clean the grinder (with
• Triac defective. tions and correct position. alarm limit. GRINDZ or unscrew,
• Capacitor • Interchange the grinders‘ • Counter was vakuum, brush)
defective. plugs at the power board not reset after • Reset cleaning counter in
• Temperature to determine the cause of last cleaning software user menu (chap-
sensor in the the malfunction. (grinder process. ter 9) or
motor winding or board) • Set cleaning limit higher
defective (0A) Service technician: in software service menu
• Circuit board • Interchange capacitors (chapter 6) or
failure. and test • Switch off the cleaning
• Check optical coupler (dis- alarm in software service
assemble power board) menu (chapter 6).
• Check triac (disassemble • Recommendation: adjust
power board) the cleaning alarm to the
weekly amount of shots
GRINDER X • Foreign object • Check fan for foreign taken for a regular remind-
FAN BLOCKED is blocking the objects. er to clean the grinder.
fan. • Interchange the fans‘
• Plug at proces- plugs at the processor
sor board not board to determine the
connected. cause of the malfunction.
• Fan defective. (fan or socket)
• Exchange fan. 24
HORECA | GASTRO GRI N DER

Alarm Record Cause Correction 9. Spare Parts

COVER OPEN • Magnet switch • After closing the magnet
open. switch press PROG-button. Spare parts are usually ordered from your customer service centre
• Grinder’s cover Grinders are not blocked. or your local dealer. To ensure quick and correct processing of your
open. • Check the plug/socket order, the following information is absolutely essential:
• Switch’s plug of the switch for correct
not connected position. 1. Type designation, serial number and voltage of the grinder (on
at the proces- • Bridge the contact in order the rating plate underneath the grinder).
sor board. to rule out defective pro-
• Strand of cessor board.
switch defec- • Test new magnet switch 2. An exact description of the part to be replaced or the article
tive. • Glue in a new contact number.
• Magnet switch magnet into the cover.
defective.
• Contact mag-
net in cover
missing.

LOW VOLTAGE • Main power • Switch off and on the

board runs at grinder.
35% under nor- • Check mains voltage.
mal operation. Check junction box.
• Power con-
sumption at
outlet too high.
• Mains voltage
too low.

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HORECA |

10. Wiring Diagram 100-120V / 50/60Hz

26
HORECA | GASTRO GRI N DER

10. Wiring Diagram 200-230V / 50/60Hz

27
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10. Wiring Diagram 240V 50Hz

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11. Certificate 12. Warranty Conditions

1. The warranty period is 1 year from the date of purchase.

EC Declaration Conformity 2. The warranty covers all damages that can be attributed to inferi-
As defined by EMC-directive 89/392/EWG
MAHLKÖNIG GmbH & Co.KG
or materials or defective workmanship. Corresponding grinders
Tilsiter Straße 142, 22047 Hamburg
Telefon : 040 - 69 69 40 - 0
will be repaired or replaced free-of-charge, with the exception
of transport or freight charges. Transport is the responsibility of
Telefax : 040 - 69 39 721

the customer. Therefore, avoid damages with all returns by cor-

Name of the manufacturer or in the EU residential authorized person: rect packing.
HEMRO AG

Address of the manufacturer or the authorized person: 3. The grinder may only be opened for cleaning purposes in accor-
Bramenstrasse 11 – CH-8184 Bachenbülach dance with the Operating Instructions.

announce, that the machine below

4. This warranty does not cover damages which have occurred
through: Improper usage, improper maintenance, lack of ser-
product type : commercial device for food processing
vicing, usage for purposes other than those intended, incorrect
machine description : Coffee grinder installation, incorrect voltage, breakage, natural wear or for rea-
machine typ : K30 TWIN sons beyond our sphere of influence.

5. In order to maintain the warranty, only original spare parts and

is in compliance with the conditions of the Directive of Machines 98/37/EG
accessory parts may be used.
and with the main standards stipulated in the Directive concerning low tension
73/23/EWG and applies to the national laws that transpose it.
6. Observe in addition our General Delivery Conditions in their re-
Issued in Bachenbülach : 01.01.2008 spective current version.
Function of subscriber : Managing Director

Name of subscriber : Nils Erichsen

7. The manufacturer is in no way liable for consecutive or second-
Signature
ary damages.

8. The warranty does not cover costs resulting from repairs con-
ducted by non-authorized personnel.
MAHLKÖNIG GmbH & Co. KG, Amtsgericht Hamburg HR A 85 074; Persönlich haftende Gesellschafterin:
Beteiligungsgesellschaft MAHLKÖNIG mbH, Eingetragen Amtsgericht Hamburg HR B 45 324, Geschäftsführer: Nils Erichsen
Dresdner Bank AG (BLZ 200 800 00) Kto. 383 780 400 Postbank Hamburg (BLZ 200 100 20) Kto. 253 89-203
Commerzbank AG (BLZ 200 400 00) Kto. 21 10 294 Ust. Id. Nr.: DE 118 37 22 65

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HORECA | GASTRO GRI N DER

NOTES
HORECA | GASTRO GRI N DER

NOTES
HORECA | GASTRO GRI N DER

MAHLKÖNIG GmbH & Co. KG

Tilsiter Straße 142
D- 22047 Hamburg, Germany

Tel.: 040 / 69 69 40-0

Fax: 040 / 69 39 721
office@mahlkoenig.de ; www.mahlkoenig.de

December 2008
Subject to change without prior notice!!

The professional art of grinding

since 1924