Baxi Combi 130 HE Installation And Servicing Instructions page 53

Dry Fire Fault
NO
Is the system
full of water ?
YES
YES
Connection C
short circuit when Pump
on ?
NO
YES
Unplug Flow Switch,
switch short circuit when
Pump on ?
NO
YES
Is Flow Switch blocked ?
NO
YES
If fault L7
check if DHW circuit
blocked ?
NO
If fault L8
YES
check if CH circuit
blocked ?
NO
Replace Flow Switch.
Supplied By www.heating spares.co Tel. 0161 620 6677
Fill system with water.
Replace Main PCB.
Wires from in-line
connector to PCB
faulty.
Remove Blockage.
Remove blockage.
Remove blockage.
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
Flow &
Return
C
Overheat
&
&
Fan
53