Error Codes And Fault Finding - Alpha InTec2 26CE Installation And Servicing Instructions

Error Fault
code
36
BUS connection fault
37 Low supply voltage
38 Loss of flame
rectification
43 Loss of flame
rectification
44 Safety lock out
Low supply voltage
45 High flow and return
temperature difference
detected
The heat output is
limited to prevent
damage to the heat
exchanger
46 Optional external
safety sensor
intervention
47 Reduced burner
output
51 Climatic RF
communication fault
59 Mains supply voltage
frequency block
60 Pump fault
61 Air in the pump
62 Full boiler calibration
required
72 Fast calibration
required
73 High flow NTC and
safety NTC difference
detected
74 Safety flow sensor
anomaly
77 Anomaly on the gas
78 valve control
79
48
Alpha InTec² 26E, 30CE and 35CE - Error Codes and Fault Finding
Fault description
Not used on this model
Insufficient supply voltage to operate boiler
Flame detected but signal lost. Ignition retries
after fan purge
Repeated loss of flame signal during operation
This fault can occur if the flue is exposed to high
wind conditions (shown as E38 in the fault code
history in the INFO menu)
The boiler has attempted to fire repeatedly for the
maximum time limit
The temperature difference between the flow and
return sensors is too high
When the temperature difference returns to a
normal level the boiler will operate normally
No continuity on external sensor circuit
Check link is present in external connections
14 and 15 or if fitted external safety device has
activated
Flue thermostat has sensed high flue gas
temperature (110°C) and reduced the burner
output to prevent damage
If the temperature continues to rise the boiler will
lock out and E03 will be displayed
Error between communication of the Climatic
transmitter and boiler receiver
The PCB detects an incorrect mains supply
voltage frequency
The pump is stuck or there is an electrical pump
fault
Restricted CH flow due to air or a circuit restriction
This may occur when the PCB is replaced or if
the parameters are altered in the air/gas section
The PCB detects that some parameters have
been altered
The board detects an anomaly in the temperature
readings difference between the flow NTC and
safety NTC sensors
The PCB detects an anomaly on the safety NTC
sensor
An anomaly on the gas valve control is detected
Possible causes
Check mains power supply
Check for bad cable connections etc
Check flame sensing electrode and lead
Check for flue gas recirculation
Check the gas valve
Check flue system and termination
Check gas supply/working pressure
Check/adjust combustion settings
Check as above for error code 38
Check external control (room thermostat)
requests
Rapid on/off tap requests
Check the primary flow is sufficient and not
restricted
Check the pump settings are appropriate for the
system requirements
Faulty return sensors (incorrect readings)
Check external sensor and cable are not
damaged or wet
Check continuity of external sensor and circuit
Check connections 14 and 15 on connection
panel
Air in heat exchanger
Restricted primary flow
Heat exchanger air flow blocked
Flue restriction
Flue sensor fault
Pump fault
Batteries require replacing
Check mains power supply
Faulty PCB
Check the pump operation, it may be necessary
to free the pump shaft (refer to Section 2.4)
Check the pump wiring
Replace the pump
Check Flow and Return valves are open
Check for correct system pressure
Check the system is purged properly
Carry out full calibration process as described in
Section 5.13
Carry out fast calibration process as described
in Section 5.13
Faulty flow or safety NTC sensor
Check resistance reading on the sensors
Poor system circulation or blockage
Faulty safety NTC sensor
Check resistance reading on sensor
Replace the safety NTC sensor
Check the electrode condition, replace if
necessary
Check the inlet gas pressure is correct and carry
out a full calibration process as described in
Section 5.13
If the fault persists replace gas valve