Baxi Combi 130 HE Installation And Servicing Instructions page 51

Fan Fault
NO
22 to 38Vdc
at connection S ?
YES
NO
When
fan on ≥ 1Vdc at
connection T ?
YES
NO
Between
22 & 38Vdc at
connection U ?
YES
NO
When
fan on ≥ 1Vdc at
connection V ?
YES
NO
When
fan on ≥ 6Vac at
connection W ?
YES
When fan on
NO
≥ 6Vac at outside
connection on fan ?
NO
Does fan run ?
Replace Fan PCB, if
fault persists replace
Main PCB.
Supplied By www.heating spares.co Tel. 0161 620 6677
Replace Main PCB.
Replace Main PCB.
Red & Blue wires from
Main PCB to Fan PCB
faulty.
Orange & Black wires
from Main PCB to Fan
PCB faulty.
Replace Fan PCB.
Red & Blue wires from
Fan PCB to Fan faulty.
Replace Fan.
15.0 Fault Finding
Transformer
Thermistors
Mains Input
Thermostats
Burner On
&
Flow Switches
Fault Neons
Condensate Trap
Pump
Room Control
Diverter Valve
Display PCB
Gas Valve
Modem PCB
Room Thermostat
V
Fan Driver Board
U
W
Flow &
Return
Overheat
&
&
T
Fan
S
51