Chart 2.
Motor runs but full sequence control does not produce ignition spark
START
With timer ON (30 min) is voltage
between output C2 on timer and
TB-N 230v??
With red wire still disconnected is
voltage between output of heat
selector switch and TB-N 230V at
high heat setting and zero volts at
low setting.
Reconnect the red wire to the
exhaust thermostat. Is voltage
between brown wire in control box
multiway connector and TB-N
230V?
Check condition of ignition
electrode and spark gap is correct
by removing heater assembly.
Does control spark?
Check HT lead is connected to
control and electrode. Does
control spark?
Disconnect the red wire from the
exhaust thermostat.
CAUTION ! IT IS LIVE!
Is voltage between heat selector
switch and TB-N 230v?
Exchange both exhaust
thermostats (150 °C and 60°C)
and inlet thermostat 130 °C
(brown wires).Does control
spark?
Does control spark with high heat
selected?
Ja
No
No
No
No
No
No
No
Yes
Exchange timer. Does control
spark?
Does control spark with low heat
selected?
Change 50 °C exhaust
thermostat. Does control spark?
Exchange heat selector switch.
Does control spark?
Exchange full sequence control
unit. Does control spark?
Exchange full sequence control
unit. Does control spark?
Check continuity of red wire
between timer C2 and heat
selector switch. Are connections
clean and tight. Does control
spark?
No
No
Yes
Yes
Yes
Yes
Yes
Yes
No
No
Refer to
chart 3
Refer to
chart 4
Does gas light?
Does gas stay on?
Machine operating. Instruct users
as necessary.
Yes
Yes
No
No
Yes
Yes
Yes
Yes
No
Yes
No
Yes
Yes
Yes
9
