Garland 7000 service manual Problem Possible Cause Measure Code, Activity Comment

Page 12

 

 

 

 

 

 

Problem

 

 

Possible Cause

 

 

 

 

Measure

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Code

No.

 

 

 

 

No

 

 

 

No

 

 

W

 

 

No.

 

 

 

 

 

Operation lamp and error lamp “OFF”

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Unit does not heat, no

 

 

Building’s power fuses

 

 

 

 

 

 

 

 

 

 

 

S25

 

reaction, contactor does

 

U250

defective, error on

 

M201

Check mains supply

 

L

 

 

 

 

 

not work

 

 

electrical transmission

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

U251

Error on operational

 

M251

Check operational control

 

L

 

 

 

 

 

 

 

 

control

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

S26

 

Building fuses blow when

 

U241

Short circuit in generator

 

M241

Repair or replace

 

L

 

 

 

 

unit is switched on

 

 

generator

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

S27

 

Some cooking platforms

 

U271

Generator defective

 

M241

Repair or replace

 

L

 

 

 

 

do not heat

 

 

generator

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

S28

 

Unit does not heat, no

 

U13

Error on DIP-Switch-

 

 

M13

Check DIP-Switch

 

L

 

 

 

 

reaction, no contactor

 

adjustment on CPU

 

 

adjustment

 

 

Legend: W = Who should complete “Measure”

E = End user L = Supplier

 

 

 

 

 

 

 

Repair Of Problems

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Measure

 

 

 

 

Activity

 

 

 

Comment

 

 

 

 

M10

 

• Compare on another cooking platform and with an induction

 

 

Check if the pan is appropriate to

 

 

 

 

 

 

 

type pan

 

 

 

 

 

induction cooking or not: use a

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

magnet.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

M11

 

• Check connection of coil

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

• Check coil on line break

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

• Coil overheated (brown color change)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

M12

 

• Change power circuit board

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

M13

 

• Check DIP-Switch adjustment on CPU-circuit board

 

 

 

 

 

 

 

 

 

M14

 

Replace CPU-circuit board

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

M30

 

Clear ventilation system

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

M31

 

Clean fan

 

 

 

 

 

 

 

 

 

 

 

 

M32

 

• Connect fan directly at 230V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

M33

 

• Change rectifier circuit board

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

M34

 

• Measure heat-sink temperature sensor resistor

 

 

Disconnect temperature sensor

 

 

 

 

 

 

 

 

At 25º Celsius (77ºF) resistor will read 20kOhm

 

 

 

 

 

 

 

 

 

 

 

 

 

At 70º Celsius (158ºF) resistor will read 3,5kOhm

 

 

 

 

 

 

 

 

 

 

 

 

• Check short circuit to case

 

 

 

 

 

 

 

 

 

 

 

 

 

 

• For a test: short-out the sensor with a 20kOhm fixed resistor

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

M40

 

• Switch off unit, cool down and switch on again. Use a pan with

 

Switch off field!

 

 

 

 

 

 

 

 

cold water

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Page 12

Part # 4526029 (02/22/11)

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Contents Model IN/MO 4526029 02/22/11 Table of Contents Requirements Authorized Personnel Operation Instructions KnowledgeKnowledge Of Electronic Systems Block Schematic System DescriptionPower Board Voltage SupplyControl unit DisplayError Messages Code SignificationPower Initial OperationFunction control Pan DetectionTrouble Shooting and Repairs Trouble Shooting Error-CodeProblem Possible Cause Measure Normal operationProblem Possible Cause Measure Code Normal operation Additional Errors Operation lamp flashesProblem Possible Cause Measure Code Activity CommentMeasure Activity Comment Adjustments Generator TypeRepair by Garland Appendix Internal Connections Rectifier Circuit Board C014CPU-Circuit Board C018 View components sidePower Circuit Board C026 Transformer Rectifier And Transistor Module4526029 02/22/11