44
Installation and Servicing
Section 3 - Servicing
SER
VICING
3.18 PRIMARY PCB REPLACEMENT
1. Carefully release the four retaining clips and remove control
box cover.
2. Unplug all lead connections to the PCB.
3. Spring out the four side retaining clips and pull the PCB
upwards to clear the corner retaining posts.
4. Fit the new PCB.
5. Re-connect all plug connections.
6. Reassemble.
7. Switch mains power on, wait for “
u
P
” to be shown.
8. Simultaneously press Mode & Restart buttons so that “
o
F
” is
shown.
9. Switch mains power off and wait for 5s.
10. Switch mains power on, wait for “
F9 SU
” to be shown
11. Rotate the CH Temperature Knob until “
F9
C
” is shown.
12. Press Restart.
13. Rotate the CH Temperature Knob until “
F9
n” is shown.
14. Press Restart.
15. Rotate the Temperature Knob until the appropriate boiler
output is shown (24 kW, 30 kW or 35 kW). Press Restart.
16. The boiler type (C), gas type (n), output (24/30/35) and
parameter set number will be shown in rotation.
If this is OK press Restart to complete the configuration,
otherwise switch mains power off to start again.
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 CONDENSATE TRAP REPLACEMENT / CLEANING
Refer to Section
3.10
1
3
Refer to Section
3.2
1
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
Содержание LOGIC COMBI2 C24
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