53
In case of problem, or when the boiler has displayed an error code, the display flashes 2 digits. Please refer to the table below
to diagnose the fault.
For faults 01 and 03,
A appears on the display, the boiler is locked and the reset button illuminates (28). To reset the boiler
press the reset button 28.
28
Fig. 107
O
verheating lock out
FAULT
19. Incorrect function
C
ode
Fault description
A
01
Overheat lock out
A 03
No flame after safety time
A 36
Flue pipe too high temperature
A 37
CPU fault
A 39
MCU fault 1
A 40
MCU fault 2
A 41
Fan error
E 02
Pump protect
E 04
No flame detection
E 05
Anti freezing system, pump on
E 06
Anti freezing system, pump and burner on
E 07
No water circulation in primary circuit
E 08
No water in the primary circuit
E 09
DHW sensor open circuit
E 10
DHW sensor short circuit
E 11
Flow sensor open circuit
E 12
Flow sensor short circuit
E 13
Return sensor open circuit
E 14
Return sensor short circuit
E 15
Outdoor sensor open circuit (if fitted)
E 16
Outdoor sensor short circuit (if fitted)
E 18
Flame lift
E 20
Flame detect with gas valve off
E 22
Fault air pressure switch
E 23
Low fan speed
E 29
Room thermostat open circuit
E30
Room thermostat short circuit
E33
Floor heating thermostat open circuit (if fitted)
E 37
Communication problem with the main PCB
E 38
Reset button pressed 5 times in 15 minutes
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