Fault Finding; Initial Checklist - Grant Vortex Pro Internal Combi Series Installation And Servicing Instructions

12 faULt finDinG

12.1 initiaL ChECKLiSt - fOR inStaLLERS OR SERViCE EnGinEERS
12.1.1 if thE BOiLER faiLS tO LiGht
First follow the procedure below
Power supply
Heating system controls
Boiler controls
Burner
If burner still fails to light
12.1.2 fOR hOt WatER - aLL thE fOLLOWinG inDiCatOR LiGhtS MUSt BE Lit
POWER
DHW PUMP
FLOW
DEMAND
BURNER
NOTE: There may be a delay before the 'burner' indicator is lit when the store is up to temperature
12.1.3 fOR niGht tiME hOt WatER fUnCtiOn - aLL thE fOLLOWinG inDiCatOR LiGhtS MUSt BE
Lit
POWER
DHW PUMP
FLOW
DEMAND
BURNER
NOTE: The 'DHW PUMP' indicator may be lit if the boiler is operating to heat the store which has priority over the central heating operation.
There may be a delay before the 'BURNER' indicator is lit when the store is up to temperature.
For further guidance, refer to Section 12.2 (main fault finding procedures).
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Check that the fused spur for the heating system is switched on.
Check that the fuse has not blown.
Check that the electricity supply has not failed; check circuit breaker in consumer unit.
Check that the timer or programmer is working and set to an 'ON' period.
Check that all thermostats are set to the required temperature and are 'calling' for heat.
Check that the boiler 'ON/OFF' switch is set to 'ON'.
Check that the 'POWER' deman indicator on the control panel is lit.
Check that the 'DEMAND' indicator is lit.
Check if the burner lockout reset button (on front face of burner) is lit.
If YES: press in the reset button to start the burner.
If burner fails to light and goes to lockout again, refer to Section 12.4.
Follow the 'burner not operating' procedure in Section 12.2 (C).
If not lit, this indicates a problem with the power supply to the boiler - switched off or
possibly blown a fuse.
If flashing, this indicates either a 'store' thermistor or PCB fault.
Refer to the 'is the DHW PUMP idicator flashing' procedure in Section 12.2 (B).
If not lit when a hot tap is opened, this indicates either a lack of water flow or possible
flow switch problem.
If not lit, this indicates either timer/programmer is not 'calling' for hot water or 'hot water'
switch is not set to 'constant'.
If flashing, this indicates a PCB fault.
Refer to the 'is the burner indicator lit' procedure in Section 12.2 (B).
If not lit, this indicates a problem with the power supply to the boiler - switched off or
possibly blown a fuse.
If flashing, this indicates either a 'store' thermistor or PCB fault.
Refer to the 'is the DHW PUMP indicator flashing' procedure in Section 12.2 (B).
If not lit when a hot tap is opened, this indicates either a lack of water flow or possible
flow switch problem.
If not lit, this indicates either timer/programmer is not 'calling' for hot water or 'hot water'
switch is not set to 'constant'.
If flashing, this indicates a PCB fault.
Refer to the 'is the burner indicator lit' procedure in Section 12.2 (B).
Section 12: fault finding