Benchmark Procombi Exclusive 24 Installation & Servicing Instructions Manual page 58

80 ALTERNATING 'F' AND '7' - LOW MAINS VOLTAGE
Reset Boiler
RESET PROCEDURE - To reset boiler, turn mode knob to reset position and immediately turn knob back to required setting.
81 NO CH OPERATION BUT HW WORKS OK
Is the mode knob in the Winter position?
Are the Timer and the Room Thermostat switched
on?
Are the Radiator Valves Open?
Is there 230Vac at (A)?
Replace the Divertor Valve
58
FAULT FINDING
YES
YES
YES
YES
NO
Move the mode knob to the Winter position
NO
Switch the Timer and Room Thermostat On
NO
Open the Radiator Valves
NO
There is no Voltage from the Timer/Room Stat. This
is not boiler fault. Ensure Voltage is supplied to
boiler by rectifying external wiring.
Procombi Exclusive -
A
Installation and Servicing