Supplied By www.heating spares.co Tel. 0161 620 6677
7 181 465 347 (05.01)
41
Rectifying faults
Error Fd
Hot water has unpleasant odour or is dark colour (system boiler)
Check
Action
This is generally caused by the formation of hydrogen sulphide by sulphate-reducing bacteria. Such bacteria are
found in water which is very low in oxygen and live off the hydrogen produced by the anode.
1.
B
Clean the hot water cylinder.
B
Replace the sacrificial anode.
B
Heat cylinder to a temperature
≥
60˚C
2.
B
Replace magnesium sacrificial anode with
impressed-current anode.
The conversion costs are payable by the opera-
tor!
Text display fails to respond, no display or display incorrect
Check
Action
Ignition lead is not fitted as specified
in installation instructions (i.e. the
lead should be routed through the
clip on the underside of the air box).
B
Hook igniter lead over clip on underside of air
box.
-or-
B
Route igniter lead behind gas valve.
Condensation in the flue pipe
Check
Action
1.
Is diaphragm in mixer unit fitted cor-
rectly (see installation instructions)?
B
Open mixer unit (29).
B
Check diaphragm for correct ori-
entation, soiling and splitting.
B
Fit diaphragm as per installation instructions or
replace.
B
Close mixer unit.
