What the manual says
Manufacturer manualBoiler stand-by - NA - None
From this model's manual
Verified against the Vokera/Vokera Compact 28 Se installation & service manual, page 6.
DIY fix possible
Check that your thermostat or timer is set to call for heatEnsure the boiler power switch is set to the 'On' or 'Summer/Winter' positionVerify that the gas supply tap is in the open position
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All 20 fault codes on the Compact 28 SE
Seeing a different code? Every code this model can display, in one place.
ACF electronic fault alarmsAlarm high limit thermostatAlarm system water pressureAlternating flashingFault sensors CHFault sensors DHWFlameFlame lockoutFlame ONGreen fast flashingGreen flashingGreen flashing + red flashingLimit thermostat interventionNTC heating probePurge cycle mode activeRed LEDRed LED illuminatedService operationTemporary fault