Carbolite Gero GPCMA 174, Installation And Operation Instructions Manual

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12.0 Fault Analysis
A. Furnace Does Not Heat Up
1.
The HEAT
light is ON The heating element
has failed Check also that the SSR is
working correctly
2.
The HEAT
light is
OFF The controller shows a
very high temperature
or code such as S.br
The thermocouple has broken or
has a wiring fault
The controller shows a
low temperature The door switch(es) (if fitted) may
be faulty or need adjustment
The contactor/relay (if fitted) may
be faulty
The heater switch (if fitted) may
be faulty or need adjustment
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 Check the supply fuses and any
fuses in the furnace control
compartment
The controller may be faulty or
not receiving a supply due to a
faulty switch or a wiring fault.
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