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Chart 2.
Motor runs but full sequence control
does not produce
ignition spark
START
With machine ON (30 min) is
voltage between
output HE on controller 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.
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 and clear of
other wires.Does control
spark?
Disconnect both red wires at heat
switch.
Reconnect only red wire with boot.
Caution the other red wire is live.Is
voltage between heat selector switch
and TB-N 230V?
Exchange both exhaust
thermostats (50°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 sensing controller,
Does gas 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?
Check continuity of red wire
between sensing control HE and
heat selector switch.Are
connections clean and tight.
Does control spark?
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
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
No
Yes
9
No
Yes
No
Yes
Содержание UC LOGIC 83AW
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