LED CODE
FAULT/EFFECT
REASON
ACTION
●
Check flow
, return and flue sensors
Defective flow, return or flue sensor,
●
Check wiring to sensors
Defective sensor or
or heat exchanger reached maximum
●
Check PCB/X6 & X8 connectors
5
ther
mal fuse gone
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 er
ror/No flame
Internal error
●
Check PCB
Activate BCC/No flame
New BCC (If required)
●
T
urn to reset to activate
Safety system failure/
Failure of internal self checking system
●
Check PCB
No flame
E
BCC er
ror/No flame
Incorrect /missing BCC
●
Reseat or r
eplace BCC (if fitted)
●
Check CH flow and r
eturn
Water flow failure
●
Check pump
O
Flame for a shor
t period
Sensor temperature differential
●
Check no air is in heat exchanger/CH system
only
incorrect
●
Check pipe connections
●
Check wir
es to flow and return sensors are not crossed
P
Power supply er
ror/
Low mains voltage
●
Check mains voltage into boiler
No flame
●
Check PCB connectors
Lock out
Faulty Low Voltage Harness
●
Replace Low V
oltage Harness
(No display) No light indication
Defective power supply
●
Check power supply
●
Check PCB/X1B connector
●
Check PCB fuse
BLOCKING CODES
29
NOTE: F
AULT 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: 01926 834834.
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 Ser
vice engineer ONLY.
