Extech FX-GH10 Manual Original página 18

4.4. Before starting any maintenance operation on the heater disconnect from
both gas and electrical suppliers.
4.5. If the unit has not been used for a long period we advise that a technician
carries out a general check up before using. It is important to control the
following:
4.5.1. Periodically check the gas supply hose conditions and, should it be
changed, use only original spare parts.
4.5.2. Check the starting electrode position (see Fig.5).
4.5.3. Check the connections of the safety thermostat and of the thermocouple:
they must always be clean.
If necessary clean the fan blade and the inside of the heater using compressed
air.
5. TROUBLESHOOTING
PROBEM
The motor does
not work
The motor works,
but the burner
does not light up
and after few
seconds the
heater stops
The burner lights
up but after few
seconds the
heater stops
The heater stops
during operation
CAUSES
No electricity supply
The safety thermostat is on
The cylinder gas tap is closed
The cylinder is empty
The nozzle is obstructed
The solenoid gas valve is not
open
There is no spark
No connection with the earthing
system
Defective connection between
sensor and safety device
Defective safety device
Excessive gas supply
Insufficient air flow
Insufficient gas supply due to
ice formation on the cylinder
Original Manual FX-GH10
SOLUTIONS
Check the terminal board with a tester
Wait about one minute then restart
Open the gas tap
Use a new cylinder
Remove the nozzle and clean it.
Check that the solenoid valve works
Check the position of electrode
Check and connect properly
Check and connect properly
Replace the safety device
Check the pressure reducer and if
required replace it
Check that the motor works properly
Check and use a larger cylinder or
two cylinders connected together.
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