Carbolite ABF 8/28 User Manual download pdf (Page 11)

MF58 – 1.06 11

5.0 FAULT FINDING

Disconnect the equipment from the supply before carrying out any internal investigation.

Furnace Does Not Heat Up

The Heat lamp

is On



The heating element

has failed



Check also that the SSR is working correctly

The Heat lamp

is Off



The controller shows a

very high temperature

or a code such as S.br



The thermocouple may have broken or may have a

wiring fault



The controller shows a

low temperature



The door switch may be faulty



A relay may be faulty



The SSR could be failing to switch on due to

internal failure, faulty logic wiring from the

controller, or faulty controller



There are no lamps

glowing on the

controller



Check the supply fuses and any fuses in the control

compartment



The controller may be faulty or not receiving a

supply due to a faulty switch or a wiring fault

Furnace Slow To Heat Up

One of the Heat lamps does

not light



A fuse may have

blown



Check the Supply fuses

The Heat lamps all light up



An element may

have failed

Furnace Overheats

The Heat lamp goes Off with

the instrument switch



The controller

shows a very high

temperature



The controller may be faulty



The controller

shows a low

temperature



The thermocouple may have been shorted

out or may have been moved out of the

heating chamber



The thermocouple may be mounted the

wrong way round



The controller may be faulty

The Heat lamp does not go off

with the instrument switch



The SSR has

failed “ON”



Check for an accidental wiring fault which

could have overloaded the SSR

Chimney Emits Smoke

Some light smoke is emitted

in the middle of the test



No fault

Dense smoke is emitted



The after-burner chamber

temperature may not be set

high enough



Set the secondary controller

temperature to 900°C



The after-burner elements

or control may have failed



Investigate or contact Carbolite



A fuse may have blown



Check the Supply fuses

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Carbolite ABF 8/28 User Manual Page 11

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