REPLACEMENT OF PARTS
8. Access to boiler control components
Move control to the service position.
Remove 3 screws (A) and remove cover
from control.
9. PCB fuse
Remove fuse in plastic housing (B) from the
PCB and replace.
There is a spare 2A fuse for F1 clipped
into the cover.
10.Transformer / PCB
Disconnect all electrical connections from
the control.
Remove 4 screws (C) retaining the rear
panel of the control and remove panel.
IMPORTANT: ENSURE CODE PLUG
IS RE-FITTED TO THE NEW
CONTROL. IF THIS IS NOT DONE
THE APPLIANCE WILL INDICATE
ERROR AND WILL NOT FUNCTION.
NOTE:
After re-assembly, check CO/CO
2
levels as described in the setting of the
air/gas ratio section.
8
9
10
A
B
C
C
REPLACEMENT OF PARTS
INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER GREENSTAR Ri
8 716 115 168a (06/2008)
43
SER
V
IC
IN
G
& S
P
AR
E
S
IMPORTANT:
Do not replace the control unit if a
CO/CO
2
analyser is NOT available.
