Instruction manual

FAULT FINDING
BOILER LOCKOUT :
Indicated by the illumination of the 'Loc
kout'
indicator on the burner.
T
o reset, wait 2 minutes then press the lockout
reset button.
Also refer to fault finding logic on page 46.
U
NDER NO CIRCUMSTANCES MUST A
APPLIANCE BE LEFT TO OPERATE WITH
ANY CONTROL LINKED OUT OR
OVE
R
R
I
DDEN.
FAULT FINDING
INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER GREENSTAR CAMRAY EXTERNAL 12/18-18/25-25/32
8 716 112 700a (02.07)
44
F
A
ULT FINDING
& DIAGRAMS
PROBLEM CAUSE REMEDY
LOCKOUT:
Pulsation on start CF - Flue draught incorrect CF - Check flue draught
Combustion settings incorrect Set up as in installation instructions
Faulty nozzle Replace nozzle
Intermittent lockout Bad electrical connection Check control box/electrical connections
Intermittent flame detection fault See flame detection fault
CF down draught CF Extend flue or fit an anti down
draught cowl
Burner motor fails to
operate
Faulty motor or electrical supply
to motor
Check for 230V to motor during startup
period
Control box fault Replace control box
Flame detection
fault
Photocell filmed over (dirty) Clean
Photocell faulty Replace
Control box faulty Replace
Incorrect CO
2
Air adjustment fault Set up as in installation instructions
Oil pressure incorrect Set up as in installation instructions
No oil from nozzle No oil at pump Check and refill oil tank/bleed oil line
Check and clean filters & valves from oil
tank to boiler
Air in pump Bleed pump
Nozzle blocked Replace nozzle
Faulty pump or drive coupling Replace
Ignition failure Electrode settings incorrect Set up as in installation instructions
Faulty ignition transformer Replace control box
Open circuit ignition Check and replace electrodes or high
tension leads if necessary
Faulty control box or electrical
connections not properly made
Correct electrical control box
connections or replace control box
BURNER FAILS
TO START:
No power to boiler Check electrical / control circuit
Faulty boiler thermostat Check by temporarily linking out high
limit and control thermostats
Programmer open circuit Check by temporarily linking out the
programmer
Faulty control box Replace control box
HIGH SMOKE
NUMBER:
Air intake/flue blocked Check & clear air intake/flue
Incorrect combustion settings Set up as in installation instructions
Oil pressure incorrect Adjust to correct pressure
Incorrect components used on
combustion head
Check with installation instructions
Faulty nozzle Replace nozzle