D Overview Of Fault Codes - Vaillant ecoTEC plus Installation And Maintenance Instructions Manual

Appendix
Status code Meaning
S.30 Room thermostat (RT) is blocking heating
mode
Summer mode active or no heat requirement
S.31
from eBUS controller
S.32 Waiting period because of fan speed devi-
ation
S.34 Frost protection mode active
S.39 "Burner off contact" has responded (e.g. con-
tact thermostat or condensate pump)
Comfort protection mode is active: Product
S.40
running with limited heating comfort
S.41 Water pressure > 2.8 bar
S.42 Flue non-return flap return signal blocks
burner operation (only in connection with VR
40 accessories) or condensate pump faulty,
heat requirement is blocked
S.46 Comfort protection mode, flame loss at min-
imum load
S.53 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 Product is within the waiting period of the
operation blocking function as a result of low
water pressure (temperature gradient)
S.57 Waiting period, comfort safety mode
S.58 Modulation limitation due to noise/wind
S.61 Gas family check unsuccessful: The coding
resistance on the PCB does not match the
entered gas group (see also F.92).
S.62 Gas family check unsuccessful: CO/CO₂ val-
ues at limit. Check combustion.
S.63 Gas family check unsuccessful: Combustion
quality outside permissible range (see F.93).
Check combustion.
S.76 System pressure too low. Top up water.
S.96 Return sensor test running, heating demands
are blocked.
S.97 Water pressure sensor test running, heating
demands are blocked.
S.98 Flow/return sensor test running, heating de-
mands are blocked.
D Overview of fault codes
Code Meaning
F.00 Flow temperature sensor interruption
F.01 Return temperature sensor interruption
F.02 Interruption cylinder charging sensor
actoSTOR (NTC) only in combination with
F.91
F.03 Interruption cylinder sensor actoSTOR
(NTC) only in combination with F.91
F.10 Flow NTC short circuit
F.11 Return NTC short circuit
48
Cause
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
NTC defective, NTC cable defective, defective plug connection on NTC,
defective plug connection on actoSTOR electronics
NTC defective, NTC cable defective, defective plug connection on NTC,
defective plug connection on actoSTOR electronics
NTC defective, short circuit in cable harness, cable/casing
NTC defective, short circuit in cable harness, cable/casing
Installation and maintenance instructions ecoTEC plus 0020209593_01