Operational Faults - Alpha InTec 26C User Instructions

8

OPERATIONAL FAULTS

The InTec range of boilers are fitted with a fault code display feature.
If a fault occurs a fault code will be displayed in the LCD display screen (item 14 in Fig. 1), indicated with an alternating
flashing E followed by the fault code. A list of fault codes are given in the table below.
In the event of a fault occurring firstly check that the gas and electricity supplies are on and that any external controls fitted
are set and working correctly.
Press the reset button (item 3 in Fig. 1) on the control panel to restart the boiler if the fault occurs again, make a note of the
fault code and contact your installer or Alpha technical Helpline for further advice.
Error Fault
code
01 Ignition failure
02 Overheat boiler lock
out
03 High flue thermostat
temperature
04 Gas valve electrical
connection fault
05 Heating flow sensor
fault
06 DHW sensor fault
(InTec C, X, GS only)
08 Maximum number of
resets
10 Primary system
pressure low
12 Cylinder sensor fault
(InTec S and
FlowSmart only)
15 Internal wiring error
16 Fan fault
Fault description
Flame not detected during ignition sequence
Overheat thermostat or thermal fuse has operated
Flue thermostat intervention (flue temperature
over 113°C)
Gas valve wiring circuit fault detected
Incorrect flow sensor resistance value
DHW sensor resistance value is incorrect
Maximum number of resets reached (5)
Primary pressure switch has operated
Incorrect cylinder sensor resistance
Incorrect wiring configuration detected
Fan wiring fault or fan faulty
Possible causes
Gas supply
Check pressure tubes
Ignition electrode gap
Flame sensor electrode gap
Ignition generator or lead
Flame sensor electrode lead
Gas valve setting
Gas valve
PCB
Pump or flow problem
Blocked heat exchanger
Air in heat exchanger
Overheat thermostat
Thermal fuse (if open circuit then replace
primary heat exchanger)
Blocked or restricted primary flow
Heat exchanger air flow blocked
Flue restriction
Flue sensor fault
Gas valve lead connection fault
Faulty gas valve
Faulty PCB
Flow sensor wire connections
Flow sensor faulty
DHW sensor wiring connection
DHW sensor faulty
Refer to fault history codes (INFO menu d9)
Check expansion vessel pressure (1 bar)
Leak in system
Expansion relief valve operated
Primary pressure switch
Cylinder sensor wiring connections
Cylinder sensor faulty
Check internal wiring connections to PCB
Combination boiler DHW sensor X4
System boiler link X14
Refer to wiring diagram
Check fan wiring connections
Fan fault
PCB fault
Alpha InTec C, X and GS
5