G Overview Of Fault Codes - Vaillant ecoCRAFT exclusive VKK GB 1206/3-E R1 Installation And Maintenance Instructions Manual

Appendix
Status code Meaning
S.23 Ignition
S.24 Burner on
S.26 Fan overrun after cylinder charging
S.27 Pump overrun
S.28 Burner anti-cycling time after cylinder charging (cycle suppression)
Special cases
S.30 Room thermostat (230/24 V) is blocking heating mode
S.31 Summer mode active or eBUS controller or built-in timer is blocking heating mode
S.32 Waiting period because of fan speed deviation (fan speed deviation still too high)
S.33 Pressure switch waiting period (pressure switch contact has not yet closed)
S.34 Frost protection mode active
S.35 Speed ramp waiting period (speed deviation at start of the ramp)
S.36 Target value for the eBUS control < 20 °C, i.e. the external control is blocking heating mode
S.39 Contact thermostat tripped
Limp home mode display active; product runs in restricted comfort protection mode. Corresponding fault code is dis-
S.40
played alternately with the status message
S.41 System pressure on the water side is too high
–
Feedback of the flue non-return flap blocks burner operation (only in conjunction with accessories)
S.42
–
Condensate pump defective -> Requirement is blocked
S.49 Siphon pressure switch has been triggered, waiting period
S.59 Minimum volume of circulation water not achieved (block temperature is too high)
S.60 Waiting period after the flame goes out
G Overview of fault codes
Code Meaning
F.00 Flow temperature sensor interruption
F.01 Return temperature sensor interruption
F.10 Flow NTC short circuit
F.13 Cylinder temperature sensor short circuit
F.20 Safety switch-off: Temperature limiter
F.22 Safety switch-off: Low water pressure
Temperature spread in the cast-iron heat ex-
F.23 changer is too high because the water circulation
volume is too low
The temperature increases too quickly at the
F.24
block or flow temperature sensor
F.27 "Secondary light"
F.28 Failure during start-up: Ignition unsuccessful
Failure during operation: Re-ignition unsuccess-
F.29
ful
Interruption of the floor-standing boiler temperat-
F.30
ure sensor
Short circuit in the floor-standing boiler temperat-
F.31
ure sensor
Speed deviation too great, fan speed outside of
F.32
the tolerance
F.33 Pressure switch does not switch on
Pressure switch does not switch off (if there is a
F.34
fan)
F.37 Speed deviation during operation
38
Cause
Cable interrupted, cable not plugged in, sensor defective
Cable interrupted, cable not plugged in, sensor defective
Cable short-circuited to earth or sensor defective
Cable short-circuited to earth or sensor defective
Air in the heat exchanger, combined with F.00 "Flow temperature sensor
defective"
Water pressure below 0.03 MPa (0.3 bar)
Pump blocked or defective
Pump does not have enough power
Installation throttled without low loss header
Pump blocked or defective
Pump does not have enough power
Installation throttled without low loss header
Flame is detected when the gas valve is closed, electronics fault
Gas supply missing, electrodes bent, defective or dirty, gas valve defect-
ive
Fault in the gas supply, gas valve defective, flue pipe not installed cor-
rectly (flue gas recirculation)
Cable interrupted, cable not plugged in, sensor defective
Cable short-circuited to earth or sensor defective
Cable harness fault, fan fault
Burner is heavily soiled; supply-air filter is heavily soiled
Pressure switch defective, condensate in the measuring hose
Fan defective, or there is an electronics fault
Installation and maintenance instructions ecoCRAFT exclusive 0020149561_01