Worcester Greenstar Heatslave II External 12/18

Burner LOCKOUT:
Blue light flashing & 9F 555 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
The burner
diagnostics can
now be accessed
& the burner
worked on without
locking out the
controls if the
burner locks out.
To reset the
burner press the
lockout reset on
the burner control
box
Burner diagnostics
mode is
automatically
exited after 5
minutes of burner
operation without
a lockout
Normal operation
Burner LOCKOUT
Power to burner.
No controls
lockout
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:
NB: 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.
Fault code 9F 556: 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 556. This is to protect the buner 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 conrol box will not
reset until the power has been interupted to the burner.
Burner diagnostic mode:
FAULT FINDING & DIAGNOSIS
BURNER DIAGNOSTICS MODE
FAULT FINDING & DIAGNOSIS
BURNER DIAGNOSTICS MODE
INSTALLATION & SERVICING INSTRUCTIONS FOR GREENSTAR HEATSLAVE II EXTERNAL 12/18-18/25-25/32 6 720 805 210-01
61
FAU LT FI NDI NG
& DIAGNOSIS