Appendix
44
Installation and maintenance instructions ecoTEC plus 0020134823_07
Code
Meaning
Cause
F.32
Fan fault
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
F.34
Safety shutdown: Pressure monitoring
Flue pressure switch: Cable break, blocked flue gas route Water pres-
sure switch: Hydraulic leakage, air in the heating circuit
F.35
Fault: Air/flue pipe
Air/flue pipe blocked
F.49
Fault: eBUS
Short circuit on eBUS, eBUS overload or two power supplies with differ-
ent polarities on the eBUS
F.61
Fault: Gas valve assembly actuation
–
Short circuit/short to earth in cable harness for the gas valve as-
sembly
–
Gas valve assembly defective (coils shorted to earth)
–
Electronics defective
F.62
Fault: Gas valve assembly switch-off delay
–
Delayed shutdown of gas valve assembly
–
Delayed extinguishing of flame signal
–
Gas valve assembly leaking
–
Electronics defective
F.63
Fault: EEPROM
Electronics defective
F.64
Fault: Electronics/NTC
Flow or return NTC short circuited, electronics defective
F.65
Fault: Electronics temp.
Electronics overheating due to external influences, electronics defective
F.67
Fault: Electronics/flame
Implausible flame signal, electronics defective
F.68
Fault: Unstable flame signal
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
F.70
Invalid device specific number (DSN)
If spare parts were integrated: Display and PCB replaced at the same
time and Device Specific Number not reset; incorrect cable harness;
liquefied petroleum gas coding resistor and DSN do not match
F.73
Water pressure sensor signal in the wrong range
(too low)
Interruption/short circuit of water pressure sensor, interruption/short
circuit to GND in supply line to water pressure sensor or water pressure
sensor defective
F.74
Water pressure sensor signal outside correct
range (too high)
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: No pressure change detection when start-
ing pump
Water pressure sensor and/or pump defective, air in the heating installa-
tion, insufficient water in the product; check adjustable bypass, connect
external expansion vessel to the return
F.76
Overheating protection on primary heat ex-
changer has responded
Cable or cable connections for safety fuse in primary heat exchanger or
primary heat exchanger defective
F.77
Fault: Flue non-return flap/condensate pump
No response from flue non-return flap or condensate pump defective
Commu-
nication
fault
No communication with the PCB
Communication fault between display and PCB in the electronics box
F.83
Fault: Flow and/or return temperature sensor
temperature change
When the burner starts, the temperature change registered at the flow
and/or return temperature sensor is non-existent or too small
–
Insufficient water in product
–
Flow/return temperature sensor not installed correctly
F.84
Fault: Flow/return temperature sensor temperat-
ure difference implausible
Flow/return temperature sensors returning implausible values
–
Flow/return temperature sensor not installed correctly
Содержание ecoTEC plus VU GB 5-5 Series
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