MF58
– 1.06 11
5.0
F
AULT
F
INDING
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
Summary of Contents for ABF 8/28
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