29
LED CODE
FAULT/EFFECT
REASON
ACTION
G
Check no air is in heat exchanger/CH system
G
Check external pump operation
1
Overheated appliance
Water temperature greater than 105 °C
G
Check PCB/X1C connector
G
Check flow thermistor
2
Water flow failure or
Sensor temperature differential incorrect
G
Check water pressure
Differential check faulty/
G
Check external pump/CH system blockage
Flame for a short period
G
Check no air is in heat exchanger/CH system
only
G
Check flow, and return sensors
G
Check wires to sensors not crossed
G
Check gas supply
3
No gas or Lockout flame
Low gas pressure.
G
Check gas service cock
signal/No flame, Lockout
No flame signal on ignition,
G
Check gas valve and lead
after 5 attempts
or loss of signal during ignition
G
Check detection electrode lead
G
Check PCB/X2A & X2B connectors
G
Check spark generator/spark electrode
G
Check mains earth lead continuity
G
Check flue sensor
4
Flue gas sensor/
Flue gas temperature greater than 95 °C
G
Check flue system
No flame
G
Check no air is in heat exchanger/CH system
G
Check pump
G
Check PCB/PCB connectors
RESET LOCK-OUT CODES
5
Defective sensor/No flame
Defective flow, return or flue sensor
G
Check flow, return and flue sensors
G
Check wiring to sensors
G
Check PCB/X6 & X8 connectors
6
Defective gas valve/
5 sec flame signal after
G
Check gas valve and lead
Flame continues after
burner is switched off
G
Check PCB
demand ends
G
Check fan
G
Check mains fan lead & connector
7
Defective fan/No flame
Missing or Erroneous RPM signal
G
Check low voltage fan lead & connector
G
Check PCB/X3 connector
A
PCB error/No flame
Internal error
G
Check PCB
Activate BCC/No flame
New BCC
G
Turn CH control knob to reset twice
to activate
C
Safety system failure/
Failure of internal self checking system
G
Check PCB
No flame
G
Check BCC is initialised
E
BCC error/No flame
Incorrect /missing BCC
G
Reseat or replace BCC
No flame
No demand/Faulty connector
G
Check PCB/X1A connector
O
Differential check faulty/
G
Check water pressure
Flame for 15 seconds
Water flow rate too low
G
Check external pump/CH system blockage
G
Check no air is in heat exchanger/CH system
G
Check flow, and return sensors
G
Check wires to sensors not crossed
P
Error in power supply/
Low mains voltage
G
Check mains voltage
No flame
G
Check PCB connectors
G
Check power supply
No light indication
Defective power supply
G
Check PCB/X1B connector
G
Check PCB fuse
BLOCKING CODES
NOTE:
RPM SIGNAL - FAN SPEED SIGNAL IN REVOLUTIONS PER MINUTE
BCC - BOILER CHIP CARD (A SMALL MICROCHIP THAT PUSH FITS ONTO THE CONTROL PCB AND ALTERS OPERATING PARAMETERS)
(ONLY FITTED TO CERTAIN MODELS)
FAULT CODES 1-4 CAN BE RESET BY FOLLOWING THE PROCEDURE IN SECTION 5.4. HOWEVER, IF ANY OTHER FAULT CODE IS
SHOWING PLEASE CONTACT YOUR INSTALLER OR THE HALSTEAD GLEN DIMPLEX SERVICE HELPLINE: 0844 371 1111.
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