Garland GIWOK 5.0, GIU 5.0 BI, GIU 1.5, GIU 3.5, GIU 5.0 User Manual

SERVICE MANUAL

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86037

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INDUCTION COOKERS WITH RTCS TECHNOLOGY

(REAL TIME TEMPERATURE CONTROL SYSTEM

COUNTER TOP/BUILT IN/WOK MODELS

IMPORTANT NOTE:

INDUCTION COOKERS MANUFACTURED WITH RTCS TECHNOLOGY WILL HAVE

FIVE DIGITS IN THE CENTER OF THE SERIAL NUMBER: EXAMPLE: BA06.00001.0505

MODELS

GIU 1.5 (BH/BA 1500)

GARLAND COMMERCIAL INDUSTRIES

185 East South Street
Freeland, Pennsylvania 18224
Phone: [phone]
Fax: [phone]

GIU 1.8 (BH/BA 1800)

GIU 2.5 (BH/BA 2500)
GIU 3.5 (SH/BA 3500)
GIU 5.0 (SH/BA 5000)

GIU 2.5 BI (BH/IN 2500)
GIU 3.5 BI (SH/IN 3500)
GIU 5.0 BI (SH/IN 5000)

GIWOK 3.5 (SH/WO 3500)
GIWOK 5.0 (SH/WO 5000)

GIWOK 3.5 BI (SH/WO/IN 3500)
GIWOK 5.0 BI (SH/WO/IN 5000)

GARLAND COMMERCIAL RANGES, LTD.

1177 Kamato Road, Mississauga, Ontario L4W 1X4
CANADA
Phone: [phone]
Fax: [phone]

Enodis UK LTD.

Swalloweld Way, Hayes, Middlesex UB3 1DQ ENGLAND
Telephone: [phone]
Fax: [phone]

Part # 4521635 (03/04/08) © 2006 Garland Commercial Industries, Inc.

Part # 4521635 (03/04/08) Page 1

TABLE OF CONTENTS

SECTION 1 –SAFETY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Description Of Warning Signs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Personnel Qualication And Training . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Safety Information, Installation And Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Unauthorized Reconstruction And Use Of Spare Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Improper Operating Methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

SECTION 2 – TECHNICAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

SECTION 3 – OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Adjusting The Performance Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Temperature Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Protection Overload Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

SECTION 4 – TESTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Pan Material For Induction Cookers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Pan Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Test With Pans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Test With Metallic Plates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Power Rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Test Of The Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Rectier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Transistor module (IGBT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

CU (RTCS) Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Potentiometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

SECTION 5 – MAINTENANCE/SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

SECTION 6 – FAULT FINDING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Flow chart to fault nding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

SECTION 7 – EXCHANGE OF SPARE PARTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

To Open The Induction Unit (Counter Top Models) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

To Open The Induction Unit (Built In Models) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

SECTION 8 – ADJUSTMENT OF PROCESS PARAMETERS . . . . . . . . . . . . . . . . . . . . . . . . . . .15

Initializing CU Sensors By The Short Circuit Plug . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Initializing The Induction Unit By PC Or Laptop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Change Of The Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Parameters For (Mains) Power Current And Pan Detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

SECTION 9 – IR (INFRARED) INTERFACE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

SECTION 10 – WIRING BLOCK SCHEMATIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Part # 4521635 (03/04/08)Page 2

SECTION 1 –SAFETY

Description Of Warning Signs

Identies safety information about
dangers which may cause serious personal
injury if equipment is not operated
properly.

Dangerous voltage warning symbol,
indicates a risk of electric shock and
hazards from dangerous voltage.

Indicates a hazard or unsafe practice

CAUTION

Warning signs mounted directly on the cooker must be
observed at all times and kept in a fully legible condition.

which could result in minor personal
injury or property damage.

Electromagnetic eld.

Personnel Qualication And Training

All persons involved in assembly, installation, commissioning,
operation and maintenance must have the appropriate
qualications. The scope of responsibility, competence and
supervision of the sta must be dened and controlled.

Safety Information, Installation And Service

Operators of the equipment must ensure that all installation,
service and as well as all inspections, are performed by
authorized and qualied personnel. Before attempting to
operate the equipment carefully read the information and
instructions outlined in the ”Installations and Operating”
manual. For all installations, service, maintenance, repair
and or overhaul of the induction cookers, personnel must
be specially qualied and must have attended a technical
training course authorized by Garland.

Do not attempt to perform any repairs or replace any part of
the induction cooker unless, all power supply to the cooker
has been disconnected.

Unauthorized Reconstruction And
Use Of Spare Parts

Reconstruction of the cooker or changes to the cooker are
not allowed. Contact the manufacturer if you intend to do
any changes to the cooker. To guarantee safety, use only
genuine OEM spare parts and accessories, authorized by the
manufacturer. Garland will not be held liable for any damage
or injury caused by used of other components.

Improper Operating Methods

The operating reliability of the cookers can only be
guaranteed when the cooker is used appropriately. The limit
values stated in this manual must not be exceeded.

Part # 4521635 (03/04/08) Page 3

SECTION 2 – TECHNICAL INFORMATION

Model BH/BA (Counter models) 120 V/1 Ph 208 V/1 Ph 240 V/1 Ph

Wattage kW 1.5/1.8 kW 2.5/3.5 kW 2.5/3.5 kW

Current A 12.5/15 12/14.5/17 10/12.5/14.5

Power factor Cos ϕ >0.95 >0.95 >0.95

Discharge rate mA 4 4 4

∅ Coil mm 190 (7.5”) 190 (7.5”) 190 (7.5”)

Model BH/IN (Counter Models) 208 V/1 Ph 240 V/1 Ph

Wattage kW 2.5 kW 2.5 kW

Current A 12 10

Power factor Cos ϕ >0.95 >0.95

Discharge rate mA 4 4

∅ Coil mm 190 (7.5”) 190 (7.5”)

Model SH/BA (Counter Models) 208 V/1 Ph 240 V/1 Ph 208 V/3 Ph

Wattage kW 3.5 kW 3.5 kW 5 kW

Current A max. 16 14.5 max. 16

Power factor Cos ϕ >0.95 >0.95 >0.95

Discharge rate mA 4 4 4

∅ Coil mm 190 (7.5”) 190 (7.5”) 190 (7.5”)

Model SH/IN (Built in Models) 208 V/1 Ph 240 V/1 Ph 208 V/3 Ph

Wattage kW 3.5 kW 3.5 kW 5 kW

Current A max. 16 14.5 max. 16

Power factor Cos ϕ >0.95 >0.95 >0.95

Discharge rate mA 4 4 4

∅ Coil mm 190 (7.5”) 190 (7.5”) 190 (7.5”)

Model SH/WO (Counter Wok Models) 208 V/1 Ph 240 V/1 Ph 208 V/3 Ph

Wattage kW 3.5 kW 3.5 kW 5 kW

Current A max. 16 14.5 max. 16

Power factor Cos ϕ >0.95 >0.95 >0.95

Discharge rate mA 4 4 4

∅ Coil mm 190 (7.5”) 190 (7.5”) 190 (7.5”)

Model SH/WO/IN (Built in Wok Models) 208 V/1 Ph 240 V/1 Ph 208 V/3 Ph

Wattage kW 3.5 kW 3.5 kW 5 kW

Current A max. 16 14.5 max. 16

Power factor Cos ϕ >0.95 >0.95 >0.95

Discharge rate mA 4 4 4

∅ Coil mm 190 (7.5”) 190 (7.5”) 190 (7.5”)

Part # 4521635 (03/04/08)Page 4

Maximum tolerance of power supply Nominal voltage +6/-10 %

Frequency 50/60 Hz

Protection class IP X0

Min. diameter of pans Approx. 12 cm ( 4.7” )

Max. ambient temperature: stockage -20°C to 70°C (-4°F to 158°F)

Max. ambient temperature: function -5 °C to 40°C (23°F to 104 °F)

Max. relative humidity of air: stockage 10 to 90 %

Max. relative humidity of air: function 30 to 90 %

SECTION 3 – OPERATION

Adjusting The Performance Rate

The performance rate is adjusted by the potentiometer
(control knob). The inductive performance depends on the
position of the potentiometer:

• Position 1 = minimum power.

• Position 9 (resp. Position 12) = maximum power.

Temperature Check

Induction coil

The temperature of the induction coil is checked by a
temperature sensor. If the coil is heated over the maximum
temperature, the heating process stops. As soon as the
coil has cooled down, the Induction unit can be re-started.
Turn the position of the control knob to “0” and then to the
required power level (See Error Message, Section 6).

Power board

The temperature of the power board is checked by a
temperature sensor. As soon as the heat sink is heated over
70°C (158°F), a cooling fan starts. A heat sink temperature of
more than 80°C (176°F) automatically reduces the power in
order to keep the induction cooker working under normal
conditions. The internal temperature of the unit is supervised
as well. The power is reduced by 50% if the temperature
reaches 75°C (167°F). As soon as the temperature reaches
90°C (194°F) the unit stops working and shows the error code
“E06” (See Error message, Section 6).

Protection Overload Current

When inappropriate pan material or magnetic objects are
detected on the heating area, the current in the induction
coil may raise excessively. In order to protect the power
board, the coil current is checked and as soon as the current
in the coil exceeds the maximum tolerance, the generator
stops and there is no further active energy exchange. The
unit can be re-started as soon as normal working conditions
are reached.

Part # 4521635 (03/04/08) Page 5

SECTION 4 – TESTS

Pan Material For Induction Cookers

When cooking with induction it is very important to use
the appropriate pan material. The bottom of the pan is the
element that closes the magnetic eld generated by the
induction coil. We highly recommend only appropriate
induction pans be used with this equipment.

A quick test can be performed to determine if a pan is
appropriate. For this test you will need 1- Liter (34 ounces)
of water at a temperature of 20°C (68°F). Heat up the pan
with the cooker set to maximum power and measure the
time it takes for the water to boil. Compare your time that
referenced by Garland: (2.5kW ➔ approx. 240 sec., 3.5kW

approx. 140 sec., 5kW ➔ approx. 80 sec., 8kW ➔ approx.

➔

60 sec.). This heat-up time gives you information regarding
the eciency of the pan tested. Bad pans have considerably
longer heating-up times for the same quantity of water.

A magnet can be used to determine whether the pan
material is appropriate for induction cooking. The magnet
must attach its self to the bottom of the pan. Please note, this
magnet test will not determine the material structure of the
pan or its eciency. In some cases the magnet will attach
itself to the bottom of the pan however, the pan may not
be suitable for use with induction cooking. Always use pans
which are suitable and designed for induction cooking.

Pan Detection

The heating area is warmed up by the

ATTENTION

These tests show whether the induction cooker is operating
correctly when small diameter pans are used and, when
small metallic objects are heated-up on the heating area.

This test will require the following material:

An appropriate pan with a bottom diameter of 12cm (4.7”) or
two untreated round iron plates, approximately 4mm (0.16”)
thick:

• iron plate 1: diameter d = 12 cm (4.7”)

• iron plate 2: diameter d = 7 cm (2.75”)

hot pan. To avoid injuries (burns) do
not touch the heating area.

Test With Pans

Step Action Level Result

1 Place the pan in

the middle of the
heating area

2 Push the pan

until the edge of
the pan is in the
middle of the
heating area

1...9 (12) Heat, the indicator
lights

1...9 (12) No heating, the
indicator does not
light

Test With Metallic Plates

Step Action Level Result

1 Place the metallic

plate 1 in the
middle of the
heating area

2 Place the metallic

plate 2 in the
middle of the
heating area

1...9 (12) Heat, the indicator
lights

1...9 (12) No heating, the
indicator does not
light

Part # 4521635 (03/04/08)Page 6

Power Rating

Test Of The Components

The heating area is warmed up by the

ATTENTION

Step Action Level Result

1 Place the pan

on the heating
area until water is
boiling

2 Reduce the power

by turning slowly
the control knob

hot pan. To avoid injuries (burns) do
not touch the heating area.

9 (12) Heat, water is

boiling

(12) 9...1 Heat rating

reduces (water
does not boil
anymore), phase
current reduces
continuously

Fan

With this test, the fan observation as well as the degree of
soiling is veried. At the beginning of the test, the induction
cooker should be cold. You need a pan with a bottom
diameter of 28 cm (11”).

Step Action Level Result

1 Place a pan on the

heating area and
ll it up with 1­Liter or (34 oz) of
water

2 Measure the time

until the fan starts
working

3 Go on cooking for

about 30 minutes

4 Stop the induction

cooker

9 (12) Heat

9 (12) The fan should start

working after 6-8
minutes

9 (12) The heating process

may periodically
be interrupted for a
period of 2 seconds.
Unit keeps working.

0 The fan keeps

working.

CAUTION

The power cord must be disconnected
from the power supply.

Rectier

The rectier is xed at the power board with four wires.
Rectier connections must be unsoldered for correct test
results To begin, you have to measure the forward voltage
between anode – cathode by means of the multimeter
(please use only multimeters with diode check as an
additional function).

The forward voltage for this diode is of about 0.5VDC in
direction A – K, in the opposite direction is “NO” current ow.

If one of the four diodes shows a short circuit or an
interruption, the rectier is defective and must be
replaced.

Part # 4521635 (03/04/08) Page 7

Transistor module (IGBT)

G

E

C

CU (RTCS) Sensors

The IGBT (Insulated Gate Bipolar Transistor) is xed onto the
power print (board) with three solder connections.

The IGBT Transistor has as a supplementary protection an
integrated recovery diode. To begin, measure the on-state
voltage of this diode. The forward voltage of this diode is
approximately 0.5VDC.

If the recovery diode shows a short circuit or an
interruption, the IGBT transistor is defective and must be
replaced.

CU Sensor 1 (Center)

4 – 5.5 Ohms

The two CU sensors are mounted directly on top of the coil
for base-line, (counter top) cookers. Both the center and
outer sensors, will measure approximately 4 - 5.5 Ohms.

CU Sensor 2 (Outer)

4 – 5.5 Ohms

Potentiometer

The potentiometer is mounted onto the main power switch.
On setting “0” the reading will be 0 - Ohms and on the
maximum level, the resistor will read 10kOhm (10,000 Ohms).
Resistor is proportional (linear) to swing angle. (see following
photo for measurement points).

Part # 4521635 (03/04/08)Page 8

Measurements taken across points

shown.

SECTION 5 – MAINTENANCE/SERVICE

Maintenance work must only be completed by authorized
personnel. Before beginning any maintenance work, ensure
that all power supply is disconnected and the appliance
has had an opportunity, to cool down. It is important that
the following maintenance procedures be performed as
recommended. Such preventative maintenance measures
will extend the life of this equipment and will provide
trouble free operation. The length of time used each and
the use frequency will determine how often maintenance
is required. Every cooker must be checked at least once a
year. The following routine maintenance should and must be
completed periodically.

Fan

Function of the cooker can only be guaranteed if all
electronic components are operated within their normal
working conditions (temperatures).

• The air inlet and air outlet slots must not be blocked.

• The air lter must not be blocked by dirt or grease.

• The airducts must be free of dirt.

• The air must circulate unhindered through the heat sink
(no hindrance).

• The fan is correctly installed and in good operation.

• The heat sinks are installed correctly and in place.

Check Induction coil

• Mechanical, screw mountings (screws all tightened)?

• Coil adhesive (coil wire in place o.k.)?

• Ferrites (all mounted and in place o.k.)?

• Copper coil (wire in place o.k.)?

• Coil connections to power board ok? (Refer to the
following Figures #1 and #2 for correct and incorrect, coil
connections).

Part # 4521635 (03/04/08) Page 9

General Checks

• Protection connection grounded?

• Screwed connections all tight?

• Isolations of cables?

• Any kind of liquids that have entered the cooker?

• Dirt in the cooker?

Figure # 1 - Correct Coil (Spoil) Connection

This connection must be well insulated and slightly bent upwards so the terminal end, does
not make contact with the high voltage section on the power board.

Coil wires must be tightly twisted together and precisely
placed.

Coil terminals must be connected in the direction shown
in photo.

Part # 4521635 (03/04/08)Page 10

Figure # 2 – Examples of Incorrect Coil (Spoil) Connections

Coil wires not twisted tightly together or precisely
placed.

Coil terminals connected in the
incorrect direction.

Coil terminals connected in the
incorrect direction.

Coil terminals connected in the
incorrect direction.

Part # 4521635 (03/04/08) Page 11

SECTION 6 – FAULT FINDING

General Information

CAUTION

The induction cooker may only be serviced by authorized service personnel.

Should the (Ceran Glass) become broken or cracked, turn o the cooker immediately and disconnect the electrical power
supply to the unit. Do not touch any parts inside the cooker.

Before replacing a part, check the wiring. Pay close attention to the following faults:

• Broken cables

• Squeezed cables

• Defective isolations of cables

• Bad soldering joints

You must not attempt to do any repairs on the circuit boards. It is important, however to do routine maintenance after every
repair see Section 5 Maintenance/Service for details.

Do not attempt to open the cooker when it is connected to the power supply. Dangerous
high voltage components will be exposed!

Error Messages

Order of error message for error code 1-8:

The indicator lamp located directly above the control knob ashes for an interval of 0.6 seconds. The number of the following
short ashes have to be counted in order to determine the type of failure. These ashes will inform you about the kind of error
or failure, corresponding to the code system below.

Number Of

Flashing Signals

Error Code

3

-...-...-

4

-....-....-

6

-......-......-......

7

-.......-.......-.......

Signicance

(Asterisk Refers To Notes At End

Of Chart)

Temperature heat sink*** a. Heat sink temperature too high – wait until the temperature

has cooled down under 40°C/104°F

b. Check supply of cooling air – perhaps blocked – check

function of fan

c. Check temperature of heat sink – replace power circuit.

Temperature cooking surface*** a. Temperature of the cooking surface too high

b. Check CU measure coil – index value at 20°C (68°F) – approx. 5

- Ohms

Temperature inside the unit too
high ***

Empty cooking sensor* a. Check cooking material in the pan

a. Check whether the unit is next to a source of heat ex: fryer,

broiler etc.

b. Check whether hot air is taken in – generator has no air

exhaust system

Measures To Take

Part # 4521635 (03/04/08)Page 12

Number Of

Flashing Signals

Error Code

8

-........-........-........

12 Power reduction, heat sink

13 Power reduction, temperature of

17 CU sensor 1 over

18 CU sensor 2 over

19 CU sensor 2, high temperature

20 Power reduction generator inside

21 Heat sink sensor error *** a. Contact the factory

24 Board temp. sensor error *** a. Exchange power unit

25 CU sensor 1 error *** a. Check CU sensor 1 for short circuit or discontinuation, index

26 CU Sensor 2 error *** a Check CU sensor 2 for short circuit or discontinuation, index

27 Empty cooking detector CU

28 Empty cooking detector CU

* The induction unit can only be restarted by turning the control knob rst to the “OFF” position, and then back to
the “ON” position to reset.

** The induction unit continues working

*** The induction unit does not heat.

(Asterisk Refers To Notes At End

Sensor error*** a. Check Cu coil

temperature **

cooking surface **

CU sensor 1
Warning temperature

temperature ***

temperature ***

warning

temperature **

sensor 1 *

sensor 2 **

Signicance

Measures To Take

Of Chart)

b. Check heat sink sensor

c. Check RTCS-sensor

d. Check board sensor

a. Turn the power level down

b. Check fan

a. Take pan o until cooking area has cooled down

b. Wait until it has cooled down

c. Check coil

a. Temperature of the cooking eld too high

b. Check CU sensor 1, index value 5 -Ohms at 25°C (77°F)

a. Temperature of the cooking eld too high

b. Check CU sensor 2, index value 5 -Ohms at 25°C (77°F)

a. Temperature of the cooking eld too high

b. Turn the power down

a. Check for heat sources around the generator and remove

them if any

b. Check air circulation

value 5 Ohms at 25°C (77°F).

value 5 Ohms at 25°C (77°F)

a. Check cooking material in the pan

a. Check cooking material in the pan

Part # 4521635 (03/04/08) Page 13

Flow chart to fault nding

Unit does not

operate

Check

Power Supply

Connection OK?

No

Yes

Connect Unit

Is there any

LED

Indication?

No

Short circuit

connection

Potentiometer?

Check

potentiometer

connection

Check LED

Yes

Disassemble

Cooker top

assembly

Replace LED

Defective

OK

Check fuse

T10A

Check rectier

DefectIve

Replace

Power Board

Check electric

Potential DC

Volts

Defective

Check IGBT

Transistor’s

Replace

Power board

Error

Check fuse

T1A

OK

Check power
Print (board)

visually

Check wiring

Error

Correct wiring,

connections

Wired
incorrectly

Check power

cord/plug &

socket

OK

Replace

Fuse

Is there any

Error codes ?

Error code in

IR Mode ?

Utilize error

code and go

ahead

according to list

Yes

No

Yes

Cooker does
not operate

Replace

Power Board

Cooker operates

Unit works.

Continuous test for

about 10 minutes is

necessary

Yes

Contact

Electrician

Defective

OK

Check if fuse is

installed correctly

and power supply

Part # 4521635 (03/04/08)Page 14

SECTION 7 – EXCHANGE OF SPARE PARTS

All spare parts and or accessories, may

CAUTION

CAUTION

CAUTION

only be replaced by authorized service
personnel.

In order to guarantee safety, use only
genuine OEM spare parts and accessories
purchased directly from a Garland
authorized part/service distributor. If other
components are used, no liability will be
accepted.

The electrical supply must be
disconnected.

To Open The Induction Unit
(Counter Top Models)

• Turn the induction unit.

• Remove M4x8 screws.

• Turn induction unit back in normal position.

• Lift cover, turn away at the right side, put it at the side
panel.

• Remove coil carrier: remove 2 stop nuts at the left.

• Remove M4 screws.

• Remove screws A1 and A2.

• Turn away coil carrier at the left.

To Open The Induction Unit
(Built In Models)

• Remove M4 screws on the right side.

• Lift cover with the glass.

• Remove M4 screws, remove coil carrier.

• Remove PT-sensor and coil connections.

SECTION 8 – ADJUSTMENT OF PROCESS PARAMETERS

The induction unit (excluding all WOK-units) with new
Cu sensors can be adjusted. This can be done either by
means of the short circuit service plug (Poti-LED) part
number (94900096) or by PC/Laptop. In addition, the pan
detection and the power performance, can be adjusted by
the hyperterminal program of the PC/Laptop. Please refer
to Section 9 “IR Interface” for instructions on how to use the
hyperterminal program.

Initializing CU Sensors
By The Short Circuit Plug

If only the CU sensor is exchanged, the new CU sensor can be
initialized by means of the short circuit service plug (Poti­LED). For this, you will not need the PC or Laptop. The pan
detection and the performance will not have to be changed.

Procedure of Initialization:

• The cooking area must be clear of any items.

• Surrounding temperature 25°C (+/- 3°C) or 77°F
(+/- 37.4°F).

• Disconnect the induction unit from the main power
supply.

Part # 4521635 (03/04/08) Page 15

• Place short circuit service plug into the power print board
across the (Poti-LED) as showed in the photo below.

• Connect the induction unit to the main power supply.

• The CU sensors initialize automatically.

• After successful initialization, the green LED on the small
CPU-print (board) illuminates.

• In case the system nds an error during initialization, the
red LED will illuminate.

IMPORTANT NOTE: When replacing the power board and
or induction coil with RTCS sensors, you must reset all
parameters.

IMPERATIVE! Pay close attention to whether you receive a
feedback signal from the PC or Laptop after every change.
This will be your signal that the change has been accepted
successfully.

12345 Entry to the mode of adjustment (password)

; Initialize Cu sensor (temperature of the coil ca.

25°C/77°F) excluding WOK.

N Increase the limit of the mains current (+)

n Decrease the limit of the mains current (-)

“ Save the limit of the mains (power) current

T Increase pan detector (+)

t Decrease pan detector (-)

= Save pan detector

-? Leave the mode of adjustment

. State software version

Change Of The Parameters

• Disconnect the induction unit from the main power
supply.

• Check the CU sensors at the plug by means of the Ohm
meter.

• Re-start the procedure of initialization.

• Disconnect the unit from the main power supply.

• Remove the short circuit service plug from both the Poti
and LED connections.

Initializing The Induction Unit
By PC Or Laptop

The initialization of the CU (RTCS) sensors (excluding all
WOK models), as well as adjustments of the pan detection

and power performance, can be performed by means of
the hyperterminal program. Please refer to Section 9 “IR
Interface” for instructions on how to use the hyperterminal
program The following adjustments must be done in the
hyperterminal program: 2400bps, 8bit, no parity, 1 stop bit,
hardware protocol.

1. Connect the RS232 connection cable to the
PC/Laptop and straighten the IR-adapter to the left lower
corner of the ceran glass. For counter top cookers, refer to
Section (9) gure #3 for correct IR adapter positioning. For
all Wok cookers, you will be required to remove the top
wok bowl assembly. Place the IR-adapter in the left hand
corner directly over the rectangular opening located on
the metal sheet with ferrit stripes. Please refer to Section
(9) gure #4 for Wok cooker IR adapter positioning.

2. Start HT2400 (see chapter 9) and turn unit on!

3. Input “12345” and the mode of adjustment will now
begin. The following message will appear on the monitor:

IR= On
WELCOME REPAIRMEN

Part # 4521635 (03/04/08)Page 16

4. Not valid for WOK cookers. The parameters on the CPU

1:KK:68 CU1:22 CU2:22 B:33 --- --- F:20080

CU Sensor 1 - Inside

Temperature of the coil

Active

Field

Heat Sink

Temperature

CU Sensor 2 - Outside

Temperature of the Coil

Error Message

Status Message

Frequency

Board

can now be changed! The unit temperature and the
ambient temperature must amount to 25°C (+/- 4°C) or
77°F (+/- 39°F). Press the key [ ; ]. On the console appears
the message “please conrm”. Press the key [ ; ] again. The
CU (RTCS) sensor will now be initialized on 25°C (77°F).
The following message now appears on the monitor:

save CU sensor : 25°C

5. Set the limit of the (mains) power current. (see mains
current parameters in this section):

N increase the limit of the mains current (+)

n decrease the limit of the mains current (-)

The following message appears on the monitor:

linecurrent limit= .......

6. Save the limit of the (mains) power current with the key [
“ ]. On the console appears the message “please conrm”.
Press the key [ “ ] again. The following message appears
on the monitor:

9. By input [ -? ] the mode of adjustment will be left. The
following message appears on the monitor:

see you again!

10 The mode for adjustment has a time-out function.

After a 10 minute period, the mode of adjustment will
automatically reset.

The adjustments are now completed and it is not possible
to make any other adjustments at this point. If further
adjustments are necessary, you will be required to start from
the beginning again!

Technical information regarding the induction cooker is
also available in real-time, in the clients mode. The following
parameters listed below can be read:

Output on the hyperterminal:

1: KK:68 CU1:22 CU2:22 B:33 --- --- F:20080
1: KK:68 CU1:22 CU2:24 B:33 --- --- F:20080
1: KK:67 CU1:22 CU2:24 B:33 --- --- F:20080
1: KK:67 CU1:22 CU2:24 B:33 --- --- F:20080

save linecurrent limit: .......

7. Set the pan detector (see pan detector, Section 4):

T increase pan detector (+)

t decrease pan detector (-)

The following message appears on the monitor:

pan detector limit= .......

8. Save the pan detector with the key [ = ].On the console
appears the message “please conrm”. Press the key [ = ]
again. The following message appears on the monitor:

save pan detector limit: .......

Meaning:

The internal cooling fan will be activated once the heat sink
temperature rises to 70°C (158°F).

Part # 4521635 (03/04/08) Page 17

Parameters For (Mains) Power Current And Pan Detector

Item Number

(Article No.)

99560101 BH/BA 1500, 120VAC, 1N, 1,5kW (GIU 1.5) 162 21
99560102 BH/BA 1800, 120VAC, 1N, 1,8kW (GIU 1.8) 187 21
99560103 BH/BA 2500, 208VAC, 1N, 2,5kW (GIU 2.5) 153 23
99560104 BH/BA 2500, 230VAC, 1N, 2,5kW (GIU 2.5) 140 27
99560105 BH/BA 2500, 240VAC, 1N, 2,5kW (GIU 2.5) 192 26
99560106 BH/BA 3000, 208VAC, 1N, 3kW (GIU 3.0) 180 26
99560107 BH/BA 3000, 230VAC, 1N, 3kW (GIU 3.0) 163 28
99560108 BH/BA 3000, 240VAC, 1N, 3kW (GIU 3.0)
99560109 BH/BA 3500, 208VAC, 1N, 3,5kW (GIU 3.5) 192 26
99560110 BH/BA 3500, 230VAC, 1N, 3,5kW (GIU 3.5) 187 28
99560111 BH/BA 3500, 240VAC, 1N, 3,5kW (GIU 3.5)
99560112 BH/BA 2300, 230VAC, 1N, 2,3kW (GIU 3.5)

99580001 BH/IN 2500, 208VAC, 1N, 2,5kW (GIU 2.5BI)
99580002 BH/IN 2500, 230VAC, 1N, 2,5kW (GIU 2.5BI)
99580003 BH/IN 2500, 240VAC, 1N, 2,5kW (GIU 2.5BI)

99560004 SH/BA 3500, 208VAC, 1N, 3,5kW (GIU 3.5) 192 36
99560005 SH/BA 3500, 230VAC, 1N, 3,5kW (GIU 3.5) 192 35
99560006 SH/BA 3500, 240VAC, 1N, 3,5kW (GIU 3.5) 185 23
99560007 SH/BA 5000, 208VAC, 3N, 5kW (GIU 5.0) 167 21
99560008 SH/BA 5000, 400VAC, 3N, 5kW (GIU 5.0)
99560009 SH/BA 5000, 440VAC, 3N, 5kW (GIU 5.0)

Induction Cooker Model

Mains-Power

Current

Pan Detector

99580004 SH/IN 3500, 208VAC, 1N, 3,5kW (GIU 3.5BI)
99580005 SH/IN 3500, 230VAC, 1N, 3,5kW (GIU 3.5BI)
99580006 SH/IN 3500, 240VAC, 1N, 3,5kW (GIU 3.5BI)
99580007 SH/IN 5000, 208VAC, 3N, 5kW (GIU 5.0BI)
99580008 SH/IN 5000, 400VAC, 3N, 5kW (GIU 5.0BI)
99580009 SH/IN 5000, 440VAC, 3N, 5kW (GIU 5.0BI)

99570001 SH/WO 3500, 208VAC, 1N, 3,5kW (GIWOK 3.5) 192 29
99570002 SH/WO 3500, 230VAC, 1N, 3,5kW (GIWOK 3.5) 192 31
99570003 SH/WO 3500, 240VAC, 1N, 3,5kW (GIWOK 3.5) 185 41
99570004 SH/WO 5000, 208VAC, 3N, 5kW (GIWOK 5.0) 167 23
99570005 SH/WO 5000, 400VAC, 3N, 5kW (GIWOK 5.0) 90 11
99570006 SH/WO 5000, 440VAC, 3N, 5kW (GIWOK 5.0) 78 10
99570008 SH/WO 8000, 400VAC, 3N, 8kW (GIWOK 8.0)

99580016 SH/WO/IN 3500, 208VAC, 1N, 3,5kW (GIWOK 3.5BI) 192 29
99580017 SH/WO/IN 3500, 230VAC, 1N, 3,5kW (GIWOK 3.5BI) 192 20
99580018 SH/WO/IN 3500, 240VAC, 1N, 3,5kW (GIWOK 3.5BI) 185 41
99580019 SH/WO/IN 5000, 208VAC, 3N, 5kW (GIWOK 5.0BI) 167 23
99580020 SH/WO/IN 5000, 400VAC, 3N, 5kW (GIWOK 5.0BI)
99580021 SH/WO/IN 5000, 440VAC, 3N, 5kW (GIWOK 5.0BI)
99580025 SH/WO/IN 8000, 400VAC, 3N, 8kW (GIWOK 8.0BI) 141 15

Part # 4521635 (03/04/08)Page 18

SECTION 9 – IR (INFRARED) INTERFACE

To begin the IR communication, you will need the HyperTerminal software which is available in Microsoft Windows under,
Start =>Program=>Accessories => HyperTerminal. Prior to the rst use, HyperTerminal should be congured properly.
Garland service requires the following settings listed below: 2400bps, 8bit, no parity,
1 stop bit, hardware protocol.

First connect the IR adapter into your PC or laptop computer. Place the IR sensor section onto the ceran glass towards the
bottom left hand corner for counter top cookers. Position the IR sensor to the generator. Refer to gure #3 in this section for
correct positioning. For all Wok cookers, you will be required to rst remove the top wok bowl assembly. Place the IR adapter
into the left hand corner, directly over the rectangular opening located on the metal sheet with ferrit stripes. For Wok cookers
please refer to gure #4 for IR adapter positioning.

Start HyperTerminal and put the access
name, e. g. IR2400.ht.

Select the communication via COM1 (or where
your IR adapter has been connected).

Part # 4521635 (03/04/08) Page 19

Select the following settings: 2400 Bits/sec., 8 Databits,
no parity, 1 Stop bit, Hardware protocol.

Setting IR 2400.ht should be saved so that there will be no need to put them again and the connection can be built-up by
selecting symbol IR2400.ht.

Figure # 3 – IR Adapter position for counter top (base-line) cookers

For all counter top induction cookers (excluding all WOK models), position the IR adapter tool to the lower left hand corner of
the ceran glass as shown in photo.

Part # 4521635 (03/04/08)Page 20

Figure # 4 – IR Adapter position for built-in (install-line) cookers

IR Adapter to be positioned directly over
rectangular opening, shown in photo.

IR Adapter tool in position.

Place Wok Bowl top assembly back
onto cooker as shown and, begin
testing using IR adapter tool.

Part # 4521635 (03/04/08) Page 21

Main (Power) Filter

L1

L2

L3

PE

(230V L2)

(208V L2)

(240V L2)

AC

DC

Power Supply

12VAC

24VDC

5VDC

-5VDC

GND

Rectifier

AC

DC

12VAC

5VDC

24VDC

T B

24VDC

Potentiometer

LED

IR

Adapter

Fan

CPU

IGBT - Transistor

DC

AC

-5VDC

24VDC

T KK

T Cu1 T CU2

Coil

RTCS

Sensors

SECTION 10 – WIRING BLOCK SCHEMATIC

Part # 4521635 (03/04/08)Page 22

Part # 4521635 (03/04/08) Page 23