42
14.0 Fault Finding
Check and correct if necessary
1. Flame sensing electrode and lead connections
2. Electrode position
Flame current should be 1 µA approx.
Replace PCB
Replace
PCB
YES
YES
Replace flame sensing electrode
NO
YES
Ensure that mains input
terminal L is Live (230V) and
N is Neutral (0V)
I
Check terminal 1 of ON/OFF/RESET selector is in
connection with PCB - A4 connector terminal 2
Check electrical continuity across terminals 1 & a
of ON/OFF/RESET selector when turned to
position
R
Replace ON/OFF/RESET selector
NO
Replace PCB
YES
K
Replace safety
thermostat
YES
NO
Overheat thermostat operated
or faulty, i.e. continuity across
thermostat terminals
Allow to cool. Continuity
across thermostat terminals
more than 1.5 ohm
J
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