WarmFlow B-Series B120 Owner's Manual - page 60

Page 58

11.0 CombiFaultFinding

11.1 CentralHeating

YES

YES

YES

NO

YES

YES

NO

YES

NO

NO

NO

Switch on power,

set selectors

for CH on and

DHW off.

Set all controls

to call for heat.

Does the

burner fire?

Is lockout lamp

on burner or

panel lit?

Is high limit

thermostat

lamp lit?

Is there continuity

across the boiler

stat connections

17 and 18 on the

PCB?

Is there continuity

across the

connections

28 and 30 on

the PCB?

Check power

from clock or

switch, check

wiring fuses and

mains supply.

Refer to burner

fault finding.

Press reset

button, replace

if necessary.

Check wiring,

replace boiler

thermostat.

Check relay and

PCB, replace if

necessary.

Do radiators

get hot?

Does boiler

cycle on its

thermostat?

Check all valves

are open and

pump is working,

check pressure,

check all air is

vented.

Check boiler

thermostat,

replace if

necessary.

HEATINGIS

WORKING

NORMALLY

NO

NO

YES