47
Installation and Servicing
Section 3 - Servicing
SER
VICING
WARNING:
It is critical that the correct boiler size
and fuel type is entered in to the boiler.
CAUTION:
Fit the earth strap provided with the PCB
to your wrist and secure to a suitable earth on the
boiler chassis.
3.19 PRIMARY PCB REPLACEMENT
Refer to Section
3.2
1. Remove and keep the screw.
2. Carefully release the four retaining clips and remove
control box cover.
3. Unplug all lead connections to the PCB.
4. Spring out the four side retaining clips and pull the PCB
upwards to clear the corner retaining posts.
5. Fit the new PCB.
6. Re-connect all plug connections.
7. Reassemble.
8. Turn power on, display shows:
Installer
Initialise spare PCB?
Yes
Press Yes and the following screen is shown:
Select boiler type
Option 1 of 2
Keston
Press Next until [Keston] is shown. Press Select.
Select Boiler Brand
Option 1 of 4
Combi
Back Next Select
Press Next until correct Boiler type is shown:
Combi
Press Select to confirm & the following screen is shown:
Select Boiler Model
Option 1 of 4
Combi
30kW
Natural Gas
Back Next Select
Press Next until correct Boiler model shown.
Program this model?
1/4
Combi 30kW
Natural Gas
Back Yes
1/4, Combi 30kW, Natural Gas
2/4, Combi, 30kW, Propane
3/4, Combi, 35kW, Natural Gas
4/4, Combi, 35kW, Propane
Press Select to confirm & the following screen is shown:
Press Yes to finish.
9. Check that the boiler operates in both DHW and CH
modes.
2
1
4
2
COMBI
HEA
T / SYSTEM
SL1
L
IN
L
IN
SL2
OPTIONAL
FROST STAT
ROOM
STAT/
TIMER L N
MAINS IN
UIN
230010 A01
L N
MAINS IN
