Ariston Fi7 16L FF, Service Manual

Page: 54 / 57

Technical Manual for DGI
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37 Drift of parameters of main control board Adjust
38 Fault of main control board Replace
99 Other causes Other causes
01 Run out of fuel gas Explain and give directives
02 Output pressure of reducing valve is on low
side
Explain and give directives
03 Too large throttle Adjust
04
Non-conforming air source (too much air
and less fuel gas)
Change another air source
Squeaking
99 Other causes Other causes
01
Irrational ratio of water volume, fuel gas
volume, air volume and flue gas, which may
cause resonance
Adjust
02 Irrational parameters of main control board Replace
03 Insecure installation Readjust
Shaking-
resonance
during running
99 Other causes Other causes
01
Unstable air pressure
Apply air pressure
stabilizing device
02 Unstable water pressure Apply water pressure
stabilizing device
03
Insufficient fuel gas pressure (type
Gi7S/Fi7)
Check air pipe or apply air
pressure booster
Instable water
temperature
99 Other causes Other causes
01
Excessive water intake temperature in
summer, demand of user is lower than the
min. heat load, no firepower segment
Explain and give directives
02 Low water pressure Explain and give directives
03 Water pipe blocked Explain and give directives
04
Water valve is not completely open, which
causes low water flow
Explain and give directives
05 Excessive air pressure Explain and give directives
06
Water volume detected by sensor is larger
than actual value
Replace
07
Parameters of main control board is on the
high side
Re-adjust
DG water
temperature is
too high
08 Adjust