9
INDICATOR LIGHTS
Mains electricity indicator:
OFF : No mains electricity to the contol
board
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 or autofrost 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
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