71
ALTERNATING ‘L’ AND ‘6’ - FALSE FLAME LOCKOUT
Reset the boiler, does Boiler Work OK?
NO
Check routing and integrity of internal boiler
wiring is OK. Check condition of Flame Sense
Electrode and replace if deteriorated.
Separate the ame detection electrode in-line
connector. Is there continuity between the terminals
pins connected to the electrode?
YES
Replace Flame Detection Electrode
YES
NO
Check routing and integrity of internal boiler wiring.
RESET PROCEDURE - To reset boiler, turn mode knob to reset position and immediately turn knob back to required setting.
70
ALTERNATING ‘L’ AND ‘5’ - 5 RESETS WITHIN 15 MINS
Turn power off and on
72
ALTERNATING ‘F’ AND ‘1’ - LOW WATER PRESSURE
Are the Boiler and CH System lled with water and
all isolation and radiator valves open (check pressure
gauge is between 1 to 1.5 bar)?
NO
Fill and vent the system and open all
isolation valves
YES
Are connections on water pressure switch secure?
NO
Re-t connections
Replace water pressure switch
YES
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