Fault Finding Using The Total Check System - Ariston EuroCombi A/23 MFFI Servicing Instructions

2.2 Fault Finding Using the
Total Check System
Boiler Off
1
Auto diagnostic state
2
Spark ignition state
3
Boiler functioning normally
4
Lockout
5
Boiler thermostat satisfied
6
Room thermostat/clock no demand or
selector in summer setting
Pump fed
Main flow switch closed
Air pressure switch N.O.
Flame detected
Water at required temperature
Room thermostat/clock no demand or
selector in summer setting
Auto diagnostics faulty
D.H.W. exchanger efficiency control
Heating circuit efficiency control
Heating temperature control
D.H.W. temperature control
B029
Supplied By www.heating spares.co Tel. 0161 620 6677
Signalling
Malfunction
A
Faulty ventilation system
b
Air pressure switch stuck in N.O. position
C
Faulty reset switch
d
Faulty main circuit flow switch
E
Faulty flame detection
F
Faulty overheat thermostat
G
Faulty exhaust fumes sensor
I
Faulty heating sensor (N.T.C.)
m
Faulty D.H.W. sensor (N.T.C.)
25