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Service / Repair
Replacing a heating element
How to check a heating element
If you notice there is a cold area on heated plastics, it may be that a heating zone or heating element is
not working correctly. In either case the first step is to check the wiring at the terminal block. It is not always
obvious that they are loose or disconnected.
1- First, check that the heating zones are set correctly, set all the zones to 70% and check for even heat
and softening plastic when the heater is held over the forming area with plastic sheet fitted. Make a note of
areas where the plastic remains hard to determine if it is a single element of entire zone.
2- If an entire zone is not functioning then remove the top cover and check that the wiring is not loose or
has become disconnected for that particular zone. You will have to remove relevant terminal block covers
to determine this. If all appears OK then set the defective zone to 100% and check the voltage at the zone
using a suitable volt meter.
3- If no voltage is present then contact Formech for service and advice.
If a single element is found to be faulty then it will require replacement. Follow below:
Unplug the machine from the mains. Bring
the heater completely forward and remove
the 10 screws retaining the cover on top of
the heater.
The front 2 screws are retained with
an internal plate that will fall when the
screws are removed. Retain this plate for
fitting during reassembly.
Before any maintenance work is carried out both electrical and air supplies must be locked in the
OFF position. Only a qualified electrical technician may work on any parts carrying mains voltage.
That person is responsible for ensuring that the machine is in a safe condition before allowing
services to be restored.
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