Appendix
0020186710_06 ecoTEC exclusive Installation and maintenance instructions
41
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/operation block function as a result of low water
pressure (flow/return spread too large)
S.54
Waiting time: Water shortage
Product is within the waiting period of the operation
blocking function as a result of low water pressure
(temperature gradient)
S.55
Waiting time: CO sensor
Waiting time: CO sensor
S.56
Waiting time: CO limit value exceedance
Waiting time: CO limit value exceedance
S.57
Waiting time: Measuring program
Calibration unsuccessful. Waiting period, comfort safety
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.85
Service message: Check water circulation volume
Service message: Check water circulation volume
S.86
Service message: Check vortex sensor
Service message: Check vortex sensor
S.87
Service message: Check differential pressure sensor
Service message: Check differential pressure 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 measurement not possible because not all
measuring programs 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
S.105
Unit not purged
Unit not purged (D.130 = 0: No bypass valve)
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
