54
Installation and maintenance instructions ecoTEC exclusive 0020193968_05
Status code
Parameter
Meaning
S.42
Flue non-return flap closed
Flue non-return flap response blocks burner operation
(only in conjunction with accessory VR40) or condensate
pump defective; heat requirement is blocked
S.46
Comfort protection: Minimum load, loss of flame
Comfort protection mode, flame loss at minimum load
S.53
Waiting time: Water shortage
Product is within the waiting period of the modulation
block/operating block function as a result of water defi-
ciency (flow/return spread too large)
S.54
Waiting time: Water shortage
Product is within the waiting period of the operating
blocking function as a result of water deficiency
(temperature gradient)
S.55
Waiting time: CO sensor
Waiting period: CO sensor
S.56
Waiting time: CO limit value exceedance
Waiting period: CO limit value exceedance
S.57
Waiting time: Measuring program
Calibration unsuccessful. Waiting period, comfort protec-
tion mode
S.58
Burner modulation limitation
Modulation limitation due to noise/wind
S.59
Waiting time: Water circulation vol.
Minimum circulation water volume
S.76
Service message: Check water pressure
System pressure too low. Top up water.
S.86
Service message: Check vortex sensor
Service message: Check vortex sensor
S.88
Purging programme is running
Purging programme is running
S.92
Water circulation volume self-test
Water circulation volume self-test
S.93
Flue gas measurement not possible
Flue gas analysis not possible because not all measur-
ing programmes have yet run
S.96
Return temperature sensor self-test
Return sensor test running, heating demands are
blocked.
S.97
Water pressure sensor self-test
Water pressure sensor test running, heating demands
are blocked.
S.98
Flow/return temperature sensor self-test
Flow/return sensor test running, heating demands are
blocked.
S.99
Vaillant self-test
Self-test
E
Overview of fault codes
Note
Since the code table is used for various products, some codes may not be visible for the product in question.
Code
Parameter
Possible causes
F.00
Interruption: Flow sensor
NTC plug not plugged in or has come loose, multiple plug on the PCB
not plugged in correctly, interruption in cable harness, NTC defective
F.01
Interruption: Return sensor
NTC plug not plugged in or has come loose, multiple plug on the PCB
not plugged in correctly, interruption in cable harness, NTC defective
F.02
Interruption: DHW outlet sensor
Only in conjunction with F.91
NTC defective, NTC cable defective, defective plug connection on NTC,
defective plug connection on the
actoSTOR
electronics
F.03
Interruption: Cylinder sensor
Only in conjunction with F.91
NTC defective, NTC cable defective, defective plug connection on NTC,
defective plug connection on the
actoSTOR
electronics
F.10
Short circuit: Flow sensor
NTC defective, short circuit in cable harness, cable/housing
F.11
Short circuit: Return sensor
NTC defective, short circuit in cable harness, cable/housing
F.12
Short circuit: DHW outlet sensor
Only in conjunction with F.91
NTC defective, short circuit in cable harness, cable/housing
F.13
Short circuit: Cylinder sensor
Combination product: Warm start sensor/cylinder sensor short circuit
Combination product with actoSTOR: Short circuit cylinder sensor (NTC)
only in combination with F.91
NTC defective, short circuit in cable harness, cable/housing
