Fault Finding & Diagnosis; Fault Finding - Worcester Greenstar Heatslave 12/18 Instruction Manual

8 716 106 252f 30/3/10 12:56
PROBLEM
LOCKOUT:
Pulsation on start
Intermittent lockout
Burner motor fails to
operate
Flame detection
fault
Incorrect CO
2
No oil from nozzle
Ignition failure
BURNER FAILS
TO START:
HIGH SMOKE
NUMBER:
48

FAULT FINDING

Page 48
CAUSE REMEDY
CF - Flue draught incorrect CF - Check flue draught
Combustion settings incorrect Set up as in installation instructions
Faulty nozzle Replace nozzle
Bad electrical connection Check control box/electrical connections
Intermittent flame detection fault See flame detection fault
Down draught Extend flue or fit an anti-downdraught
cowl (CF only)
Faulty motor or electrical supply Check for 230V to motor during startup
to motor period
Control box fault Replace control box
Photocell filmed over (dirty) Wipe clean
Photocell faulty Replace
Control box faulty Replace
Air adjustment fault Set up as in installation instructions
Oil pressure incorrect Set up as in installation instructions
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 Replace
Faulty mechanical shut off valve Clean or replace
(12/18 & 18/25 only)
Electrode settings incorrect Set up as in installation instructions
Faulty ignition transformer Replace
Open circuit ignition Check and replace electrodes or high
tension leads if necessary
Faulty control box or electrical Correct electrical control box
connections not properly made connections or replace control box
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 8 & 9 on
the connector
Faulty control box Replace
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 Check with installation instructions
combustion head
Faulty nozzle Replace nozzle
INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER GREENSTAR HEATSLAVE 12/18-18/25-25/32
FAULT FINDING
BOILER LOCKOUT :
Indicated by the illumination of the 'Lockout'
indicator on the fascia.
To reset, wait 2 minutes then press the lockout
reset button.
Also refer to fault finding logic on pages
51 and 52
UNDER NO CIRCUMSTANCES MUST AN
APPLIANCE BE LEFT TO OPERATE WITH
ANY CONTROL LINKED OUT OR
OVERRIDDEN.
8 716 106 252f (03/2010)