Chart 3. Motor runs Full Sequence Control produces ignition sparks, but gas does not ignite.
Is voltage between input and
neutral on each solenoid 230v?
Whilst control is sparking is
voltage at terminal 4 of control
unit 230V?
Check continuity of wiring
between 4 Way housing and
relevant solenoid also neutral
wiring. Check plug clean and
tight.
Does gas light?
Exchange Heater Assembly.
Does gas light?
Using the looping connections
on the terminal block on the
base at the rear, check that the
voltage to the solenoids is 230v
whilst the control is sparking
Remove plinth 199. Can gas be
lit manually?
Start
Check spark gap continuity of
H.T. lead and electrode not
cracked. Does burner light?
Exchange control unit. Does gas
light?
No
Yes
Yes
Does gas stay on?
Yes
No
Whilst control is sparking is
voltage at gas control relay PCB
terminal T1 230v?
Yes
No
Check gas control relay wiring.
Exchange if wired correctly. Does
gas light?
Yes
Check wiring between control
unit and 4 Way Terminal block. If
necessary exchange 143°C
inlet temperature limiter. Does
gas light?
Yes
Yes
Yes
No
Yes
No
No
No
Fault in gas system rectify as
necessary.
Yes
No
Exchange solenoid coils in turn.
Does gas light?
Yes
No
No
Yes
Refer to Chart 4
Machine operating. Instruct user
as necessary.
Yes
No
No
No
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