Blue Seal GT45E, Installation And Operation Manual

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27
Fault Finding
Fault Possible Cause Remedy
Pilot Burners will not light /
stay alight.
Check gas supply is turned on. Turn on gas supply.
Check gas supply is low or empty. Replenish gas supply.
Thermocouple connection loose.
Tighten thermocouple connection.
Replace any damaged connectors.
Over temperature lead connection
to interrupter on thermocouple is
loose. Loose connections will
cause resistance to millivolt circuit
and result in pilot outage.
Tighten over temperature lead to the
interrupter on the thermocouple.
If sufficient pilot flame cannot be
obtained, remove pilot orifice
from pilot burner and check for
blockage of the pilot burner and /
or correct size.
If connections OK, check for gas at
the pilot burner by manually lighting
the pilot burner.
If pilot can be lit but flame too
small to impinge on the
thermocouple.
Check adjustment of pilot flow by
adjusting screw below control knob
on gas control. Check the supply.
If pilot flame OK but goes out
after control knob released (after
holding in for approx. 30 secs).
Check for faulty thermocouple or
over temperature thermostat.
Call service provider.
Check the oil temperature. If
a b o v e 2 0 5 ° C , t h e o v e r
temperature will be open circuit.
Wait for oil to cool to approximately
190°C and re-light pilot burner. If
overtemp is operating OK the pilot
should now stay alight.
Check the oil temperature, if the
oil is cold, disconnect the
thermocouple from the gas
control, while holding in the
control knob in the pilot position
and using a multimeter measure
the millivolts being generated
between the thermocouple end
and earth (place other probe of
multimeter on body of gas
control).
With the thermocouple hot, millivolt
reading should be between 20-30
mV. If voltage reading below 15
millivolts the thermocouple is
defective. Replace the
thermocouple.
If no millivolts generated,
disconnect overtemperature
thermostat leads from interrupter
terminal on thermocouple and
check continuity through
overtemperature thermostat with
multimeter.
If overtemperature thermostat is
open circuit it is faulty and needs
replacing.
If there is continuity through over
temperature thermostat then
thermocouple is faulty and needs
replacement.
If all of the above in the pilot and
thermocouple system checks out
satis. but the problem still
persists.
The gas control valve is defective
and needs replacement.
Pilot Burner delay in ignition
of main burners.
Check operating pressure as
stated in ‘Installation’ section.
Increase by adjusting pilot
adjustment screw on gas control.
Check pilot flame adjustment. Pilot flame for main burner ignition
should be approximately 1 inch long.
Check pilot burner size is correct.
(See 'Specifications' section).
Fault Finding the Gas System