Baxi Combi Instant 80e Installation & Servicing Instructions Manual page 46

Fault Finding Solutions
E
Check and correct if necessary
1. Electrical and pressure tube connections
2. Blockage of pressure tubes
3. Restriction in flue
4. Venturi
F
NO
Gas at burner
G
1.
Check the burner setting pressure
(see Technical Data and Commissioning)
2.
Voltage at modulating coil of gas valve is:
Max. burner press.approx 9V DC (13V DC LPG)
Min. burner press.approx 1V DC
Current at modulating coil of gas valve is:
(Use an instrument with average function for this
measure)
30 ÷ 230 mA DC (45 ÷ 310 mA DC - LPG gas)
H
Check and correct if necessary
1. Ignition electrode and lead
2. Electrode connection
3. Spark gap and position
46
NO
Ensure gas is on and purged
PCB - A1 connector has 230V across
terminals 2 & 4
NO
neon flashing
NO
Replace main PCB
230V at Main PCB - A1
YES
connector across terminals
3 & 5. Check wiring
14.0
Replace air pressure
switch
YES
Replace gas valve
YES
Turn selector switch
to reset position
YES
Replace gas valve
NO
Replace main PCB
NO
YES
Fault Finding
R
Replace main PCB
Replace igniter