Vaillant VUW 246/5-3 (H-GB), Installation And Maintenance Instructions Manual

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Installation and maintenance instructions ecoTEC pro 0020244995_04
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.
D 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.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.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.
F.22 Safety switch-off: Low wa-
ter pressure
No/insufficient water in the
product or the water pressure is
too low 1. Check: Plug, cable to heating pump or water pressure
sensor, water pressure sensor, heating pump.
2. Activate and purge check programme P.0.
F.23 Safety switch-off:
Temp.spread too large
Temperature spread too great.
Water circulation too low
▶
Check: Plug, cable to heating pump/water pressure sensor,
air/insufficient water in the heating circuit, flow and return tem-
perature sensor inverted, strainer in the hydraulic block, water
pressure sensor, heating pump (sufficient circulation, level 2:
D.19, D.14, non-return valve). Activate check programme P.0.
F.24 Safety switch-off: Temp.
incr. too fast
Temperature increase too fast
▶
Check: Plug, cable to the heating pump, air/insufficient water
in the heating circuit, internal air vent (function), heating pump
(system pressure too low, temperature gradient too great on
heating flow, non-return valve). Activate check programme P.0.