57
fig. 104
GW 420/0
fig. 105
GW 502/0
fig. 106
GW 503/0
fig. 107
GW 459/0
fig. 108
GW 504/0
8. Fault finding
8.1 Introduction
ECOmax has an inbuilt advanced
multifunction boiler display (1, fig.
104) to assist you with fault finding
in the unlikely event of a boiler mal-
function. The display features the
following 4 modes:-
1. Normal Mode
Under normal conditions the boiler
display will show the boiler flow tem-
perature, e.g. 82 ° - fig. 105. This
indicates the boiler is operating cor-
rectly after an internal self check.
2. Fault Mode
Should a fault develop in the boiler
the display will show a `fault code'
indicating what the problem may be.
The fault code will appear as a letter
`F' followed by a two digit number,
e.g. boiler display showing fault code
F.21 - fig. 106.
3. Diagnostic Mode
In order to assist with the pinpointing
of a particular fault it is possible to
use the boiler display in a diagnostic
mode to interrogate the boiler about
the status of certain components.
To display the diagnostic mode
depress both buttons under the display
simultaneously (1 and 2, fig. 107).
Once in the diagnostic mode the
required diagnostic code is selected
by pressing the left hand button under
the display (2, fig. 107) until the
required code (e.g. d.20 - fig. 108) is
found. (If the button is left depressed
the display will rapidly scroll through
all codes - release the button when
the required code is displayed).
