Unigas P60 VS, Manual Of Installation - Use - Maintenance

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Other reason for ignition missing can be due to the following causes:
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electrodes ceramic insulator broken
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electrode ignition cable disconnection, while removing/mounting the blast tube
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ignition cable damaged
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faulty ignition transformer
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faulty fuel valve
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excess of combustion air at the ignition point (i.e., in case of very high depressure in the combustion chamber)
If flame does not appera within the safety time “SafetyTme1Gas/Oil”
,
or it appears but it is not detected by the flame detector, the bur-
ner locks out and the following message is displayed:
”NO FLAME AT END OF SAFETY TIME”
alternatively code number C:25 and diagnostic number D appear:
C: 25 D:----
If burner does not start up the message will be:
”FAULT POSITIONING ACTUATOR”
alternatively code number C:15 , and diagnostic code D appear:
C: 15 D:----
it means that there is a faulty actuator and its number is represented by the diagnostic code D .
C:15 D 01 = Air actuator position not reached
C:15 D 02 = Fuel actuator position not reached
C:15 D 04 = Aux1 actuator position not reached
C:15 D 08 = Aux2 actuator position not reached
C:15 D 10 = Fan speed not reached
C:15 D 20 = Aux3 actuator position not reached
ATTENTION: in these cases the actuator must be replaced and addressed (see paragraph “Addressing the actuators”).
Gas burners with pilot “Gp2 ”
SV = Safety valve
V1 = Valve 1
V2 = Valve 2 & gas governor
ACT = Gas actuator
PV = Pilot Valve
The burner is provided with factory-set ignition point. The pilot (PV) gas valves are adjusted completely open and the pilot pressure
governor (PV) is set to values that allow easy operation for the Service Centre at first ignition.
CAUTION ! If no flame is detected atignition stage, proceed as follows:
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check the gas pipeline was properly bled
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increase setp by step (max 2° per step) the gas actuator opening at ignition position
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it is recommended not to exceed 20° opening.