User Guide
Landcal Blackbody Source
Type P1600B2
Page 25
10 Fault Finding
10.1 Furnace does not heat up
The
HEAT
light is
ON
→
The heating element has
failed
→
Check also that the SSR
is working correctly
The
HEAT
light is
OFF
→
The controller shows a
very high temperature
or a code such as
S.Br
→
The thermocouple is
broken or has a wiring
fault
The controller shows a
low
temperature
→
The door switch(es) (if
fitted) may be faulty
→
The contactor (if fitted)
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 lights glowing
on the controller
→
The
SUPPLY
light is
ON
The controller may be
faulty or not receiving
a supply due to a faulty
switch or a wiring fault
→
The
SUPPLY
light is
OFF
Check the supply
fuses and any fuses
in the furnace control
compartment
10.2 Furnace Overheats
The
HEAT
light
goes
OFF
with the
instrument switch
→
The controller shows a
very high temperature
→
The controller is 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
have been mounted the
wrong way round
→
The controller may be
faulty
The
HEAT
light
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
