15.0 FAULT FINDING
E
Check and correct if necessary
1.Electrical and pressure tube connections
2.Blockage of pressure tubes
3.Restriction in flue
4.Venturi
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Replace air pressure switch
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Gas at burner |
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| Ensure gas is on and purged |
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| PCB - M4 connector is approx 230V AC, |
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| terminals 36 & 38 |
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| YES |
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| Turn selector switch |
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| neon illuminated |
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| to ‘Reset’ position |
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| NO |
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| Replace PCB |
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1.Check the burner setting pressure of
the gas valve
(see Section 9.2 of Commissioning)
2.
Voltage at modulating coil of gas valve is: | YES |
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Max. burner press.approx 9V DC (13V DC LPG) | Replace gas valve | ||||
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Min. burner press.approx 1V DC |
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Current at modulating coil of gas valve is: |
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(Use an instrument with average function for this | NO |
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measure) |
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Replace PCB | |||||
30 ÷ 230 mA DC (45 ÷ 310 mA DC LPG) |
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H
Check and correct if necessary
1.Ignition electrode and lead
2.Electrode connection
3.Spark gap and position
YES
230V at Main PCB - M4 connector across terminals 37 & 38. Check wiring
NO
YES
Replace PCB
Replace gas valve
electrical
plug/igniter assy
44 | Publication No. 5111811 |
