Garland 7000 service manual Repair Of Problems, Possible Cause, Measure, Code, Activity, Comment

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)