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Installation and maintenance instructions ecoFIT pure 0020230531_06
Fault code
Meaning
Possible cause
F.67
Value sent back by ASIC is incorrect
(flame signal)
Implausible flame signal, electronics defective
F.68
Fault: Unstable flame (analogue input)
Air in gas, gas flow pressure too low, incorrect air ratio, incorrect gas in-
jector, ionisation flow interruption (cable, electrode)
F.70
Invalid product code (DSN)
Display and PCB replaced at same time and Device Specific Number not
reset, wrong or missing output coding resistor
F.71
Fault: Flow/return temperature sensor
Flow temperature sensor signalling constant value: Flow temperature sensor
incorrectly positioned on flow pipe, flow temperature sensor defective
F.72
Fault: Deviation in the water pressure
sensor/return temperature sensor
Flow/return NTC temperature difference too great
→
flow and/or return tem-
perature sensor defective
F.73
Fault: Water pressure sensor not con-
nected or has short-circuited
Interruption/short circuit of water pressure sensor, interruption/short circuit
to GND in supply pipe to water pressure sensor or water pressure sensor
defective
F.74
Fault: Electrical problem in the water
pressure sensor
Line to water pressure sensor has a short circuit to 5 V/24 V or internal fault
in the water pressure sensor
F.75
Fault: Pressure sensor
Pressure switch defective
F.76
The safety cut-out in the primary heat
exchanger is defective
Safety cut-out feedback does not match the gas valve assembly feedback
F.77
Fault: Condensate or smoke
No response, flue non-return flap defective
F.78
Interruption to DHW outlet sensor at
external control
UK link box is connected, but domestic hot water NTC not bridged
F.83
Fault: Dry fire
When the burner starts, the temperature change registered at the flow or
return temperature sensor is non-existent or too small: Insufficient water
in the product, the flow or return temperature sensor is not in the correct
position on the pipe
F.84
Fault: Flow/return temperature sensor
Values not consistent, difference < -6 K
Flow and return temperature sensors signalling implausible values: Flow and
return temperature sensors have been inverted, flow and return temperature
sensors have not been correctly installed
F.85
Fault: Temperature sensor
The flow and/or return temperature sensors have been installed on the same
pipe/incorrect pipe
Temperature sensor not connected or is connected incorrectly
F.86
Fault: Underfloor heating contact
Underfloor heating contact open, sensor disconnected or defective
F.87
Fault: Electrodes
Electrodes not connected or they are connected incorrectly, short circuit in
the cable harness
F.88
Fault: Gas valve assembly
Gas valve assembly not connected or it is connected incorrectly, short circuit
in the cable harness
F.89
Fault: Pump
Pump not connected or it is connected incorrectly, incorrect pump connec-
ted, short circuit in the cable harness
Connection
No communication between the main
PCB and the user interface
Electronics defective
