22
The setup & service menu
If a Service Key has been entered, a fifth option is displayed.
1>LED etc 5 Relays
2 V+T
3 KeyMatrix
4 OTA Raw
Selecting 5>Relays initiates a test cycle showing the
following screens in sequence
Relay Test
Gas
Gas FB= ON
Relay Test
Ignitor
Gas FB = OFF
Relay Test
Compressor
Gas FB = OFF
Relay Test
Fan
Gas FB = OFF
(2)
(3)
(1)
(4)
The Gas Solenoid is energised (Gas flows to Mixing
Chamber unless turned off at cylinder).
The Gas Solenoid is de-energised and the ignitor is activated for a
few seconds. Observe the igniter functioning through the
chimney inspection flap, ignition sparks should travel more often
to the centre of the burner than the edge.
If sparks travel to anywhere but the burner the igniter requires
replacement. Similarly, if a spark can be heard but not seen it is
likely the igniter requires replacement as insulation has possibly
broken down.
The Gas Solenoid remains de-energised, the igniter stops
functioning and the Compressor runs for a few seconds
(ensure Rear Panel switch is set to INT).
The Gas Solenoid, Igniter and compressor stop operating
and the Fan runs for a few seconds.
The test cycle repeats until the back/ STOP key is pressed.
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