Error Cause - Solution
Pressure switch error The pressure switch is not detected / defective
contact a service centre
Water sensor error Water sensor not detected / defective
contact a service centre
Sensor error. ue gases Flue gas sensor not detected / defective
contact a service centre
Firebox sensor error Firebox sensor not detected / defective
contact a service centre
No communication Communication between the boiler and IQ2 is interrupted.
Turn the IQ2 off and on again.
If the error persists, contact a service centre.
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