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5
Trouble-shooting
19
Blue Seal Evolution Series GT45 / GT46 / GT60
©
Moffat Ltd, January 2007
Revision 1/
5.2.3
Main burners will not light
Figure 5.2.3a
Figure 5.2.1d
Figure 5.2.2
5.2.2 Piezo ignitor not sparking
Short in high tension lead
If repeated sparking of the piezo shows only
intermittent sparking at the electrode, then the
lead should be traced to find area of short. This
can be visually seen as the spark arks. If the lead
is shorting the best solution is to replace it, as the
electrical insulation of the lead may have
deteriorated.
If the spark arc can be seen at the electrode in-
sulator at the pilot burner instead of at the
electrode tip, then the insulator probably has a
fracture and should be replaced
Piezo ignitor faulty
If no spark at all can be generated, remove piezo
ignitor and hold close to cabinet body . Depress
piezo ignitor and if a spark cannot be generated
to the cabinet body the piezo ignitor is faulty and
should be replaced.
Note:
If piezo ignition fails, the pilots can be
manually lit in the interim until the piezo circuit is
repaired. A standard taper torch ,lighter or
matches can be used for manual back–up
ignition.
Overtemp tripped
Check the oil temp with the thermometer. If the
oil temperature has reached over 220
°
C the
overtemp should have tripped (open circuit), and
will not reset until the temperature has dropped
below 192
°
C. If the oil temperature is below
180
°
C and the overtemp is still open circuit then
the overtemp is faulty.
Overtemp faulty
To check if the overtemp is faulty hold in the gas
control button and light the pilots (leaving the
control button depressed to keep the pilot alight).
With a multimeter measure the voltage from the
gas control side of the thermocouple interrupter
block to earth. If the voltage is under 5mV (and
the thermocouple is generating at least 20mV)
then the overtemp is faulty—replace. If all of the
above checks out ok then check gas control or
thermocouple.
Thermopile faulty
Check locations of thermopile and thermostat are
correct and are tight and secure.
Set gas control to pilot flame setting and remove
thermostat connection from the right hand
connection screw (marked TH). Measure the mV
generated by the thermopile by placing
multimeter probes on the gas control
connections. A good thermopile with correct
flame impingement should generate between
450-700mV. If under 300mV thermopile is faulty–
replace.
Gas control side of interrupter block
Earth