Fault Finding - Benchmark Procombi Exclusive 24 Installation & Servicing Instructions Manual

76 ALTERNATING 'F' AND '7' - LOW MAINS VOLTAGE
Contact electricity provider
77 ALTERNATING 'F' AND '9' - PCB FAULT
Replace PCB -
Ensure that the BCC (boiler chip card - small plastic part) is
fitted to the PCB otherwise replace PCB.
78 ALTERNATING 'C' AND '0' - BCC ACTIVATION FAULT
Reset the boiler
RESET PROCEDURE - To reset boiler, turn mode knob to reset position and immediately turn knob back to required setting.
79 ALTERNATING 'c' AND '2' - BCC FAULT (BOILER CHIP CARD)
Is the correct BCC for the boiler securely inserted into the
slot at the front left of the PCB?
(identified by the label on the BCC)
Replace the BCC with a new BCC (that is correct for the
boiler). After switching power on and 'c0' being shown,
press reset. Is 'c2' still shown?
RESET PROCEDURE - To reset boiler, turn mode knob to reset position and immediately turn knob back to required setting.
Procombi Exclusive -

FAULT FINDING

YES
Installation and Servicing
NO
Securely insert the correct BCC for the boiler
into the PCB and after switching power on and
'c0' being shown, reset boiler.
Note. Ensure the correct orientation of BCC by
placing "TOP" side up.
YES
Replace PCB
57