0020244998_04 ecoTEC plus Installation and maintenance instructions
57
Statuscode
Meaning
S.46 Comfort protection: Min-
imum load, loss of flame
Comfort protection mode for flame loss at minimum load is activated.
S.53 Waiting time: Water
shortage
The product is within the waiting period of the modulation block/operating block function as a result of
a water deficiency (flow/return spread too large).
S.54 Waiting time: Water
shortage
Product is in the waiting period of the operation blocking function as a result of low water pressure
(temperature gradient).
S.57 Waiting time: Measuring
program
The product is within the waiting period as a result of the measuring programme.
S.58 Burner modulation limit-
ation
The burner modulation limitation is activated.
S.61 Fault: Incorrect gas type
The coding resistor on the PCB does not match the entered gas group (see also F.92).
S.62 Adjust CO2
Set the CO
2
content.
S.63 Fault: Check gas route
A fault message is activated. Check the gas route.
S.76 Service message: Check
water pressure
A service message is activated. Check the water pressure.
S.88 Purging programme is
running
The purge programme is activated.
S.92 Water circulation volume
self-test
The self-test for the water circulation volume is activated.
S.93 Flue gas measurement
not possible
Flue gas analysis is not currently possible.
S.96 Return temperature
sensor self-test
The self-test for the return temperature sensor is activated.
S.97 Water pressure sensor
self-test
The self-test for the water pressure sensor is activated.
S.98 Flow/return temperature
sensor self-test
The self-test for the flow/return temperature sensor is activated.
S.99 Vaillant self-test
The Vaillant self-test is activated.
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.
Message
Possible cause
Measure
F.00
Interruption: Flow sensor
Flow temperature sensor de-
fective or not connected
▶
Check: Flow temperature sensor, plug, cable harness, PCB.
F.01
Interruption: Return sensor
Return temperature sensor de-
fective or not connected
▶
Check: Return temperature sensor, plug, cable harness, PCB.
F.02
Interruption: DHW outlet
sensor
Cylinder temperature sensor for
the shift-load cylinder defective
or not connected
▶
On the shift-load cylinder, check (only in conjunction with
F.91): Plug, cable harness, temperature sensor.
F.03
Interruption: Cylinder
sensor
Temperature sensor for the
shift-load cylinder defective or
not connected
▶
On the shift-load cylinder, check (only in conjunction with
F.91): Temperature sensor plug, temperature sensor, PCB
plug, cable harness.
F.10
Short circuit: Flow sensor
Flow temperature sensor de-
fective or has short-circuited
▶
Check: NTC plug, cable harness, cable/housing, PCB, NTC
sensor.
F.11
Short circuit: Return
sensor
Return temperature sensor de-
fective or has short-circuited
▶
Check: NTC plug, cable harness, housing, PCB, NTC sensor.
F.12
Short circuit: DHW outlet
sensor
Cylinder temperature sensor
defective or has short-circuited
▶
Check (only in conjunction with F.91): NTC plug, cable har-
ness, NTC sensor, PCB.
F.13
Short circuit: Cylinder
sensor
Warm start sensor/cylinder tem-
perature sensor defective or not
connected
1.
Check: NTC plug, earth connection, cable harness, NTC
sensor, PCB.
2.
Check the following on the shift-load cylinder (in conjunction
with F.91): NTC plug, earth connection, cable harness, NTC
sensor, connection to the PCB.
F.20
Safety switch-off: Temper-
ature limiter
Maximum temperature at the
flow/return temperature sensor
is too high when the safety cut-
out function is operating using
the NTC
▶
Check: Flow temperature sensor (correct thermal connection),
cable harness, sufficient purging.