IDEAL LOGIC + Combi 24 Installation And Servicing page 48

59 CONDENsATE TRAp/sIphON REpLACEMENT
1. Refer to Frame 49.
Note: Ensure condensate trap
is fully drained before removal.
2. Pull off the rubber pipe at
the sump drain.
3. Disconnect the condensate
drain pipe.
4. Remove the cleaning plug
5. Turn the siphon clockwise
to disengage and lift to
remove.
6. Reassemble in reverse
order.
7. When reassembling ensure the trap is full of water.
8. Check operation of the boiler. Refer to Frames 37-40.
60 MAIN pCB REpLACEMENT
Note that production boiler PCBs are factory pre-set to operate for boiler range and output, but when ordering Primary PCB as a
spare, an additional Boiler Chip Card (BCC) MUST also be purchased for your specific boiler range and output.
Note. Fit the earth strap provided with the PCB to
your wrist and secure to a suitable earth on the boiler
chassis.
1. Refer to Frame 49.
2. Note the control knob positions.
3. Remove the 2 screws retaining the control box
cover.
4. Carefully lift the 4 retaining clips and remove
control box cover.
5. Unplug all lead connections to the PCB including
the ribbon cable (to facilitate ribbon cable removal,
ease side clips apart and pull upwards), also
where applicable, push the small plastic clip with
an electrical screwdriver to facilitate plug removal.
6. Spring out the two side retaining clips and pull the
PCB upwards to clear the 4 corner retaining posts.
7. Take the new Primary PCB and attach the
appropriate Boiler Chip Card (BCC) to it (this
should correspond to the output of the boiler:
24kW, 30kW or 35kW).
Note. Ensure the correct orientation of BCC by
placing "TOP" side up as shown.
8. Re-connect all plug connections.
9. Reassemble in reverse order.
10. Turn power back on to the boiler, after a few
moments the display will start alternating between
"c" and "0". Turn the reset knob fully clockwise
and when the display shows " - " turn the knob fully
anti-clockwise IMMEDIATELY.
Finally move the knob into the required position
(Standby, Summer or Winter).
11. Check operation of the boiler. Refer to Frames 37-
40.
48
sERVICINg
4
2
Siphon
5
3
5
Plastic
Clip
Ribbon Cable Connection
Ideal Logic
3
4
5
7
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Combi -
Installation and Servicing
3G9690
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