Supplied By www.heating spares.co Tel. 0161 620 6677
LED CODE FAULT/EFFECT
REASON
ACTION
Check flow, return and flue sensors
5
Defective sensor or
Defective flow, return or flue sensor
Check wiring to sensors
thermal fuse blown
or heat exchanger reached maximum
Check PCB/X6 & X8 connectors
safe working temperature
CHECK THERMAL FUSE IS OPEN CIRCUIT.
IF THAT IS THE CASE THE HEAT EXCHANGER
HAS TO BE REPLACED - SEE SECTION 9.8
Defective gas valve/
5 sec flame signal after burner
Check gas valve and lead
6
Flame continues after
is switched off
Check PCB
demand ends
Check fan
7
Defective fan/No flame
Missing or Erroneous RPM signal
Check mains fan lead & connector
Check low voltage fan lead & connector
Check PCB/X3 connector
A
PCB error/No flame
Internal error
Check PCB
Activate BCC/No flame
New BCC (If required)
Turn to reset to activate
Safety system failure/
Failure of internal self checking system
Check PCB
No flame
E
BCC error/No flame
Incorrect /missing BCC
Reseat or replace BCC (if fitted)
Check CH flow and return
Water flow failure
Check pump
O
Flame for a short period
Sensor temperature differential
Check no air is in heat exchanger/CH system
only
incorrect
Check pipe connections
Check wires to flow and return sensors are not crossed
P
Power supply error/
Low mains voltage
Check mains voltage into boiler
No flame
Check PCB connectors
Check DHW flow switch & lead
DHW cold
Defective DHW thermistor
Check Diverter valve & lead
or open circuit
Check PCB/X4 connector
Check filter in flow switch
(No display) No light indication
Defective power supply
Check power supply
Check PCB/X1B connector
Check PCB fuse
BLOCKING CODES
NOTE: FAULT CODES 1 TO 4 CAN BE RESET BY FOLLOWING THE PROCEDURE ABOVE, HOWEVER IF ANY
OTHER FAULT CODE IS SHOWING PLEASE CONTACT YOUR INSTALLER OR HALSTEAD BOILERS LTD. SERVICE
HELP LINE: 08450 710780.
Note:
All Lock-out and Blocking codes will flash if displayed.
A flashing '
C
' indicates that the boiler is in Service Mode and that the boiler will fire continuously at minimum input.
This setting is for the convenience of the Service engineer ONLY.
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