Chaffoteaux & Maury Britony combi 80 Maintenance And Service Manual page 8

FAULT FINDING CHART Part 1
.
-Check mains electrical connection
-Check internal fuses
-Check connection between the 2
PCBS
Ok
No
Yes
Does the red LED
1 No
Ihght ?
I
- Ok
Press the reset button
Check or replace the DWH flow
switch
Does the pump run 1
Draw off Domestic Hot water
1 PLEASE CHECK THE FOLLOWING POINTS CAREFULLY BEFORE GOING
Replace DHW flow
Check DHW flow switch
Does the pump run ? Does the fan run ?
1
switch
operation
I
.I , ,
y&3& "--
Lot
-Replace pressure swtch
switch continuity
\ J
between P and 2
Check or replace main or secondary
heat exchangers They could be
_.."-. ~ ..".. ,,. .,,- -.iler
-Id 1
Replace spark generator or ignition
electrods assembly a go~~~o~~~~o 1 1
11 fully scaled.
I
Release pump rotor
THROUGH THE FAULT FINDING CHART
-Gas
pressure
-Electric mains
-Minimum water pressure in the heating circuit (over 0.8 bar)
-All isolating valves have been opened
-Boiler air vented
-Minimum domestic hot water flow of 2 I/min
-Check that the heating filter is clear.
Replace driver or control PCB
Replace heating thermistor
Check heating
thermistor
Replace pressure switch
Ok
Check air pressure
switch continuity
between P and 1
No
Replace fan assembly
I
& No
I
Replace Driver or control PCB I