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Fault Finding
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Project Heat -
Installation and Servicing
67 FaULT FINDINg ChaRT MaIN MENU
aLTERNaTINg ‘L’ and ‘1’
gO TO FRaME 68 -
FLOW TEMpERaTURE OVERhEaT LOCKOUT
aLTERNaTINg ‘L’ and ‘2’
aLTERNaTINg ‘L’ and ‘6’
aLTERNaTINg ‘F’ and ‘2’
aLTERNaTINg ‘F’ and ‘3’
aLTERNaTINg ‘F’ and ‘4’
aLTERNaTINg ‘F’ and ‘5’
In order to assist fault finding the boiler has a 7 segment display. The key to the display codes is as follows:
aLTERNaTINg ‘F’ and ‘6’
aLTERNaTINg ‘F’ and ‘7’
aLTERNaTINg ‘F’ and ‘9’
aLTERNaTINg ‘F’ and ‘0’
aLTERNaTINg ‘c’ and ‘0’
gO TO FRaME 69 -
IgNITION LOCKOUT
gO TO FRaME 70 -
FaLsE FLaME LOCKOUT
gO TO FRaME 71 -
FLaME LOss
gO TO FRaME 72 -
FaN FaULT
gO TO FRaME 73 -
FLOW ThERMIsTOR FaULT
gO TO FRaME 74 -
RETURN ThERMIsTOR FaULT
gO TO FRaME 75 -
OUTsIDE sENsOR FaULT
LOW MaINs VOLTagE -
CONTaCT ELECTRICITy pROVIDER
pCB FaULT -
**REpLaCE pCB
BCC NOT FITTED
REsET BOILER
NO Ch
NO DhW
gO TO FRaME 79
gO TO FRaME 80
**If PCB replaced as a spare ensure that the BCC (boiler chip card - small plastic part) is fitted to the PCB otherwise replace PCB.
aLTERNaTINg ‘L’ and ‘5’
5 REsETs WIThIN 15 MINs -
TURN pOWER OFF aND ON
REsET pROCEDURE
- To reset boiler, turn mode knob to reset position and immediately turn knob back to required setting.
aLTERNaTINg ‘c’ and ‘2’
gO TO FRaME 78 -
BCC FaULT (BOILER ChIp CaRD)
Note that production boiler PCBs are factory pre-set to operate for boiler range and output, but when ordering Primary PCB as a
spare, an additional Boiler Chip Card (BCC) MUST also be purchased for your specific boiler range and output.
aLTERNaTINg ‘F’ and ‘a’
gO TO FRaME 76 -
FLOW/RETuRN REVERSED
aLTERNaTINg ‘F’ and ‘d’
gO TO FRaME 77 -
NO WaTER FLOW
NO DIspLay
gO TO FRaME 81