Indicator Lights; Controls - Bosch Worcester 28CDi User Instructions

Fig. 2. Controls.
Central heating
demand indicator
Mains
electricity
indicator
Operating
switch

INDICATOR LIGHTS

Mains electricity indicator:
Central heating demand indicator:
FLASHING SLOW : Ignition lockout
(once per second)
FLASHING FAST : Appliance fault (other than ignition
(five times per second)
Domestic hot water demand indicator:
FLASHING FAST : Air flow fault (RSF). Flue gas spillage
(OF)
(five times per second)
Central heating and domestic hot water demand indicators:
BOTH FLASHING SLOW : Overheat cut-off
(once per second)
Flame detection indicator:
DHW demand
indicator
Reset
button
CH temperature DHW temperature
control knob control knob
OFF : No mains electricity to the appliance
ON : Mains electricity is connected to the
appliance
OFF : No demand for heat to the central
heating circuit
ON : Central heating demand
lockout)
OFF : No demand for domestic hot water
ON : Domestic hot water demand
OFF : Burner off
ON : Burner on
Flame detection
indicator
Sealed system pressure
gauge
9