Fault finding and diagrams
Greenstar Utility
ErP -
6 720 821 751 (2018/04) 41
8 Fault finding and diagrams
8.1 Fault finding
WARNING: Under no circumstances must an appliance
be left to operate with any control linked out or
overridden.
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
Combustion settings incorrect Set up as in installation instructions
Intermittent flame detection fault
See flame detection fault
Down draught
Extend flue or fit an anti-down draught cowl (CF only)
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) Wipe clean
Photocell faulty
Replace
Control box faulty Replace
Incorrect CO2 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 appliance
Air in pump
Bleed pump
Nozzle blocked
Replace nozzle
Faulty pump or drive
Replace
Ignition failure 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 connections not properly
made
Correct electrical control box connections or replace
control box
BURNER FAILS TO START: No power to appliance Check electrical / control circuit
Programmer open circuit Check programmer
Faulty appliance thermostat
Check by temporarily linking out high limit and control
thermostats
Faulty control box
Replace
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
FAULTY APPLIANCE OPERATION
Noisy operation Pump noise from air in pump or worn pump Bleed air from pump or replace pump
Worn motor bearings Replace motor
Fan out of balance
Replace fan
Boiling No primary water circulation Check system / circulating pump
Short circuit appliance thermostat Temporarily take out of circuit to check
Thermostat bulb not fully home in pocket
Ensure bulb is pushed fully home
Faulty appliance thermostat
Replace if necessary
Short Cycling External controls not operating correctly Check and correct external controls
Appliance thermostat differential incorrect
Replace appliance thermostat
Burner rating incorrect
Correct burner rating
OIL SMELLS: Blocked flue, fumes on startup CF - Check flue with gauge and check seals/gaskets
RS - Check seals/gaskets
Oil soaked appliance, faulty burner operation, numerous
lockouts
Rectify burner operation and lockouts
Odour in appliance room, oil leaks from pipework,
flexible hoses connections
Rectify oil leaks, replace components if necessary
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