D Overview Of Fault Codes - Vaillant ecoFIT pure Series Installation And Maintenance Instructions Manual

D Overview of fault codes
Code Meaning
F.00 Flow temperature sensor interruption
F.01 Return temperature sensor interruption
F.10 Flow temperature sensor short circuit
F.11 Return temperature sensor short circuit
F.13 Warm start sensor/cylinder sensor short circuit
F.22 Safety shutdown: Water deficiency
F.23 Safety shutdown: Temperature spread too great
F.24 Safety shutdown: Temperature rise too fast
F.25 Safety shutdown: Flue gas temperature too high
F.27 Safety shutdown: Flame simulation
F.28 Failure during start-up: Ignition unsuccessful
F.29 Failure during operation: Re-ignition unsuccess-
ful
F.32 Fan fault
F.49 Fault: eBUS
F.61 Fault: Gas valve assembly actuation
F.62 Fault: Gas valve assembly switch-off delay
F.63 Fault: EEPROM
F.64 Fault: Electronics/NTC
F.65 Fault: Electronics temp.
F.67 Fault: Electronics/flame
F.68 Fault: Unstable flame signal
F.70 Invalid device specific number (DSN)
F.71 Flow temperature sensor fault
F.72 Flow and/or return temperature sensor fault
F.73 Water pressure sensor signal in the wrong range
(too low)
F.74 Water pressure sensor signal outside correct
range (too high)
0020230535_07 ecoFIT pure Installation and maintenance instructions
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, short circuit in cable harness, cable/housing
NTC defective, short circuit in cable harness, cable/housing
NTC defective, short circuit in cable harness, cable/housing
No or insufficient water in the product, water pressure sensor defective,
cable to pump or water pressure sensor loose/not connected/defective
Pump blocked, insufficient pump output, air in product, flow and return
NTC connected the wrong way round
Pump blocked, insufficient pump output, air in product, system pressure
too low, non-return valve blocked/incorrectly installed
Break in plug connection for optional flue gas safety cut-out (SCO),
break in cable harness
Moisture on the electronics, electronics (flame monitor) defective, gas
solenoid valve leaking
Gas meter defective or gas pressure switch has triggered, air in gas, gas
flow pressure too low, thermal cut-out has triggered, condensate route
blocked, incorrect gas injector, incorrect spare gas valve assembly, fault
on the gas valve assembly, multiple plug on PCB incorrectly plugged
in, break in cable harness, ignition system (ignition transformer, ignition
cable, ignition plug, ignition electrode) defective, ionisation flow interrup-
ted (cable, electrode), incorrect earthing of product, electronics defective
Gas supply temporarily stopped, flue gas recirculation, condensate route
blocked, defective earthing of product, ignition transformer has spark
failure
Plug on fan not correctly plugged in, multiple plug on PCB not correctly
plugged in, break in cable harness, fan blocked, Hall sensor defective,
electronics defective
Short circuit on eBUS, eBUS overload or two power supplies with differ-
ent polarities on the eBUS
–
Short circuit/short to earth in cable harness for the gas valve as-
sembly
–
Gas valve assembly defective (coils shorted to earth)
–
Electronics defective
–
Delayed shutdown of gas valve assembly
–
Delayed extinguishing of flame signal
–
Gas valve assembly leaking
–
Electronics defective
Electronics defective
Flow or return NTC short circuited, electronics defective
Electronics overheating due to external influences, electronics defective
Implausible flame signal, electronics defective
Air in gas, gas flow pressure too low, incorrect air ratio, condensate
route blocked, incorrect gas injector, ionisation flow interruption (cable,
electrode), flue gas recirculation, condensate route
If spare parts fitted: Display and PCB replaced at same time and DSN
not reset, incorrect or missing output coding resistor
Flow temperature sensor signalling constant value:
–
Flow temperature sensor incorrectly positioned on the flow pipe
–
Flow temperature sensor defective
Flow/return NTC temperature difference too great → flow and/or return
temperature sensor defective
Interruption/short circuit of water pressure sensor, interruption/short
circuit to GND in supply line to water pressure sensor or water pressure
sensor defective
Line to water pressure sensor has a short circuit to 5 V/24 V or internal
fault in the water pressure sensor
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