OPERATING THE BOILER GREENSTAR HEATSLAVE II EXTERNAL 12/18, 18/25 & 25/32
6 720 805 212a (07.2013)
USING YOUR
BOILER
8
OPERATING THE BOILER
BOILER ALERT STATE:
Should a fault develop with this boiler (or the system), the boiler will enter into a Locking or Blocking
condition. In the event of a Lockout condition, the blue operation/fault light and the alert triangle
symbol will flash, an alpha numeric fault code and a 3 digit cause code will be displayed.
BOILER RESET:
1. Press the button on the fascia to clear the fault.
4‘Reset’ and the spanner symbol are briefly displayed.
4If the reset was successful the boiler will return to normal operation.
4If the reset was not successful then the alert code will be displayed again, and the blue
operation/fault light will continue to flash.
Should the boiler enter into a Blocking condition, the boiler will stop operating and no fault
code will be displayed. In most cases the condition will clear automatically when the associated fault
clears e.g. waiting for an area to cool. In some cases a Blocking error has a defined time duration prior
to changing to a Locking condition.
If the fault remains and cannot be cleared by pressing the reset button, contact Worcester, Bosch
Group for assistance on 0844 892 3000.
