Error Codes - Ariston C Operating Instructions Manual

19. Error Codes

In case of an error, or when the boiler has to display a message, the display flashes 2 digits. Please refer to the table below to
diagnose the default.
For default 01 and 03, A appears on the display, the boiler is locked and the red button lights (28). To reset the boiler press key
28.
Overheating lock out
FAULT
Fault description
Code
Overheat lockout
A 01
No flame detected within allowed time
A 03
Flue pipe too high temperature
A 36
CPU fault
A 37
PCB fault 1
A 39
PCB fault 2
A 40
Fan error
A 41
No Circulation (check pump and water pressure)
E 02
No flame detection
E 04
Anti-freeze system, pump only
E 05
Anti-freeze system, pump and burner
E 06
No water circulation in primary circuit
E 07
No water in the primary circuit
E 08
Flow sensor open circuit
E 11
Flow sensor short circuit
E 12
Return sensor open circuit
E 13
Return sensor short circuit
E 14
Outdoor sensor open circuit (where fitted)
E 15
Outdoor sensor short circuit (where fitted)
E 16
Flame lift
E 18
Flame detected with gas valve off
E 20
Faulty air pressure switch
E 22
Low fan speed
E 23
Tank sensor open circuit
E 25
Tank sensor short circuit
E 26
Tank fault warning
E 27
Room sensor open circuit
E 29
Room sensor short circuit
E 30
Under floor heating thermostat open circuit
E 33
Flue pipe sensor open circuit
E 34
Flue pipe sensor short circuit
E 35
Flue pipe too high temperature
E 36
Communication problem with the main PCB
E 37
Reset pressed 5 times within 15 minutes
E 38
56
Fig. 107
28