E Overview Of Fault Codes - Vaillant ecoTEC exclusive 835 Installation And Maintenance Instructions Manual

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