The company reserve the right to alter size, shape and specification without prior notice
TMS-UT-0804-Z01-4
page 19
FAULT FINDING
When switched on,
switches on control
panel show the
voltage, however the
boiler does not heat
Is the
limiting thermostat
activated?
Safety thermostat can be
activated if air is present in
installation or operation thermostat
is faulty or relay is blocked
Is the room
thermostat
too low?
YES
YES
Is the
operating thermostat
defective?
NO
NO
Replace the operating
thermostat with new
YES
Please check the following
before going through fault
finding flowchart.
Check the installation is
correct.
All isolating valves are open.
The system is full of water
(pressurised) and purged of
air.
Programmer and controls
outside of boiler are on.
Check the electrical supply is
connected correctly and
present
NO
Adjust correct temperature
Is the
RED lamp
''air in the boiler''
illuminated?
Check the water pressure
and purged of air
YES
NO
Is the
voltage present
on immersion
heaters
Replace the immersion
heaters
YES
