9
INDICATOR LIGHTS
Mains electricity indicator:
OFF : No mains electricity to the appliance
ON : Mains electricity is connected to the
appliance
Central heating demand indicator:
OFF : No demand for heat to the central
heating circuit
ON :Central heating demand
FLASHING SLOW : Ignition lockout
(once per second)
FLASHING FAST : Appliance fault (other than ignition
(five times per second) lockout)
Domestic hot water demand indicator:
OFF : No demand for domestic hot water
ON : Domestic hot water demand
FLASHING FAST : Air flow fault.
(five times per second)
Central heating and domestic hot water demand indicators:
BOTH FLASHING SLOW : Overheat cut-off
(once per second)
Flame detection indicator:
OFF : Burner off
ON : Burner on
Fig. 3. Controls.
Operating
switch
Mains
electricity
indicator
Reset
button
Flame detection
indicator
DHW demand
indicator
Central heating
demand indicator
CH temp
control knob
DHW temp
control knob
System pressure
gauge
26CDi XTRA
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