Baxi System 35/60 Installation And Servicing Instruction page 42

G
1.
Check the burner setting pressure of
the gas valve
(see Section 9.2 of 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)
H
Check and correct if necessary
1. Ignition electrode and lead
2. Electrode connection
3. Spark gap and position
I
Ensure that mains input
terminal L is Live (230V) and
N is Neutral (0V)
YES
Check and correct if necessary
1. Flame sensing electrode and lead connections
2. Electrode position
Flame current should be 1 µA approx.
J
Overheat thermostat operated
or faulty, i.e. continuity across
thermostat terminals
YES
K
Check terminal 1 of On/Off/Reset selector is in
connection with PCB - A4 connector terminal 2
Check electrical continuity across terminals 1 & a
of On/Off/Reset selector when turned to position
42
230V at PCB - A1
YES
connector across terminals
3 & 5. Check wiring
YES
NO
Allow to cool. Continuity
NO
across thermostat terminals
more than 1.5 ohm
Replace
PCB
R
14.0 Fault Finding
YES
Replace gas valve
NO
Replace PCB
NO
Replace PCB
YES
Replace igniter
Replace PCB
Replace flame sensing electrode
YES
NO
Replace On/Off/Reset selector
YES
Replace PCB
Replace safety
thermostat