Baxi Potterton 80 HE - Manual (Page 47)

47
14.0 Fault Finding
Check and correct if necessary
1. Electrical and pressure tube connections
2. Blockage of pressure tubes
3. Restriction in flue
4. Venturi
NO
E
Replace air pressure
switch
Gas at burner Ensure gas is on and purged
Replace main PCB
Replace gas valve
neon flashing
PCB - A1 connector has 230V across
terminals 2 & 4
YES
Turn selector switch
to reset position R
YES
NO
NO
NO
F
Replace main PCB
G
Check and correct if necessary
1. Ignition electrode and lead
2. Electrode connection
3. Spark gap and position
230V at Main PCB - A1
connector across terminals
3 & 5. Check wiring
YES
NO
YES
H
YES
Check the burner setting pressure
(see Technical Data and Commissioning)
1.
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)
Replace gas valve
NO
Replace main PCB
2.
Fault Finding Solutions
Replace gas valve
electrical plug &
igniter assembly