Baxi Combi 130 HE Installation And Servicing Instructions page 49

Intellistat Fault
NO
5Vdc
at connections J ?
YES
NO
5Vdc
at connections K ?
YES
NO
5Vdc
at connections L ?
YES
NO
Continuity
between connections M
with power off ?
YES
NO
Continuity
between connections N
with power off ?
YES
Replace Room Control,
if fault persists replace
Main PCB.
Terminal Block in Room Control
L
+5V
0V
Supplied By www.heating spares.co Tel. 0161 620 6677
Replace Main PCB.
Wiring Main PCB to
boiler 3-way terminal
block faulty.
Wiring boiler 3-way
terminal block to Room
Control Faulty.
S wire from Room
Control to boiler 3-way
terminal block faulty.
S wire from boiler 3-
way terminal block to
Main PCB Faulty.
S
15.0 Fault Finding
Mains Input
Burner On
&
Fault Neons
Pump
Diverter Valve
Gas Valve
Modem PCB
Room Thermostat
Mains Input
Terminal Block in Boiler
N L
External Room
Filter
Timer Thermostat
Link Link
L 1 2 3 4
N
M
Transformer
Flow &
Return
Thermistors
Overheat
Thermostats
&
Flow Switches
&
Condensate Trap
J
Room Control
J
Display PCB
Fan
Optional
Intellistat
Pump
Feed
+ S -
6 7
5 8
K
K
N
49