6

FAULT FINDING

 

 

 

 

 

 

 

Fault description

Possible problem

Solution

 

 

 

 

1.

The instrument does not

- faulty protection fuse

-Replace the fuse

 

work even if the power

- faulty power cable

-Replace the power cable

 

cord is correctly fitted and

- faulty power switch

-Contact your service representative

 

the mains switch is in the

 

 

 

correct position.

 

 

2.

When the instrument is

- short circuit on power supply card

-Contact your service representative

 

turned on the fuse blows

- faulty power switch

 

3.

The heating and cooling

- faulty power supply card

-Contact your service representative

 

function of the dry well is

- faulty controller card

 

 

not working

- damage to one or more Peltier cells

 

4.

The controller is not

- faulty controller card

-Contact your service representative

 

disabled when the set-

 

 

 

point is reached

 

 

5.

The heating and cooling

-damage to one or more Peltier cells or

-Contact your service representative

 

times out of specification.

damage to the heating system

 

6.

Fan system not working.

-faulty power supply card

-Contact your service representative

 

 

-faulty controller card

 

 

 

-faulty fan

 

7

At high temperatures the

-incorrect step or preset values

-Change the step or preset values

 

instrument cannot

-faulty reference probe

-Contact your service representative

 

stabilize.

 

 

Note:

Fuses are designed to give maximum protection in case of fault. Make sure that voltage selector and fuses are selected for the nominal working value.

K400 Issue No. 1

53

Page 63
Image 63
GE K400 user manual Fault Finding

K400 specifications

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