Fault Analysis - Bibby Sterilin Lenton EF 11/8 Installation, Operation & Maintenance Instructions Manual

6.0 F A
AULT NALYSIS
A. Furnace Does Not Heat Up
1. The HEAT light
is ON
2. The HEAT light
is OFF
B. Furnace Overheats
1. The HEAT light
goes OFF with
the instrument
switch
2.
The HEAT light
does not go off
with the
instrument
switch
LF01
à The heating
element has failed
The controller
shows a very high
temperature or a
code such as S.br
The controller
shows a low
temperature
There are no
lights glowing
on the
controller
à The controller
shows a very high
temperature
à The controller
shows a low
temperature
à The SSR has failed
"ON"
à Check also that the SSR is working
correctly
à The thermocouple has broken or has a
wiring fault
à The door switch(es) (if fitted) may be
faulty or need adjustment
à The contactor (if fitted) may be faulty
à The SSR could be failing to switch on due
to internal failure, faulty logic wiring from
the controller, or faulty controller
à The SUPPLY
light is ON
à The SUPPLY
light is OFF
à The controller is faulty
à The thermocouple may have been shorted
out or may have been moved out of the
heating chamber
à The thermocouple may be mounted the
wrong way round
à The controller may be faulty
à Check for an accidental wiring fault which
could have overloaded the SSR
à The controller may be
faulty or not receiving a
supply due to a faulty
switch or a wiring fault
à Check the supply fuses and
any fuses in the furnace
control compartment
EF, AF
11