Fault finding and diagnosis
Greenstar Heatslave II External
ErP -
6 720 813 345 (2014/09)
47
8.9
Burner diagnostics mode
Service/installation engineers only.
To access the Burner control box diagnostics or to use the burner reset
button to reset the burner, the burner diagnostic mode must be
activated as follows:
Fig. 89
Fault code 9F 856
: If burner lockout is reset 5 times in one demand period using the fascia reset button the controls will lockout with a new code: 9F
856. This is to protect the burner components against over use of the reset and requires a power down of the appliance to reset. The burner control box
also has this facility, if the reset button is operated 5 times the control box will not reset until the power has been interrupted to the burner.
Burner LOCKOUT
Blue light flashing & 9F 855 cause
code on display (there is no power to
the burner when the controls are in
lockout.
Hold down the
service mode
button then press
the controls reset
button
Release
the service
mode button.
The controls
lockout is reset
but the burner
lockout is not reset.
To reset the
burner press the
lockout reset
on the burner
control box.
Burner LOCKOUT
Power to burner.
No controls
lockout.
6720805209-75.1Wo
Burner diagnostics
mode is
automatically
exited after 5
minutes of burner
operation without
a lockout.
Normal operation.
The burner
dianostics can
now be accessed
& the burner
worked on without
locking out the
controls if the
burner locks out.
The burner diagnostics mode can be manually exited at any time when the burner is locked out by holding down the service mode button
whilst pressing the controls reset button.
