Codes	Description
Red LED on	Lockout – Low water pressure, Make sure pressure is above 1.5bar, reset boiler
Red LED flashing	DHW temperature control knob in service position – Turn DHW control knob into temperature range
Red LED flashing	Overheat – Check both overheat stats
Yellow LED flashing	Error – Turn DHW control knob into temperature range and turn CH temperature control knob into power (reset position) and wait for minimum of 30 seconds before turning into either summer or temperature position
Yellow LED on	Flame present on the burner
Green LED on	Boiler ready for operation
Green LED off	No power to boiler – Check for 230volts into the appliance, check fuse on pcb
Green LED flashing	Boiler in stand-by – Reset position

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