Water Pressure Switch - Benchmark Procombi Exclusive 24 Installation & Servicing Instructions Manual

69 ALTERNATING 'L' AND '5' - 5 RESETS WITHIN 15 MINS
70 ALTERNATING 'L' AND '6' - FALSE FLAME LOCKOUT
Reset the boiler, does Boiler Work OK?
Separate the flame detection electrode in-line
connector. Is there continuity between the terminals
pins connected to the electrode?
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.
71 ALTERNATING 'F' AND '1' - LOW WATER PRESSURE
Are the Boiler and CH System filled with water and
all isolation and radiator valves open (check pressure
gauge is between 1 to 1.5 bar)?
Are connections on water pressure switch secure?
Replace water pressure switch
54
FAULT FINDING
Turn power off and on
NO
NO
YES
YES
Check routing and integrity of internal boiler
YES
wiring is OK. Check condition of Flame Sense
Electrode and replace if deteriorated.
YES
Replace Flame Detection Electrode
NO Fill and vent the system and open all
isolation valves
NO
Re-fit connections
Procombi Exclusive -
Installation and Servicing