21
troubleshooting
Problem
Possible Case
Solution
Heater does not start
No power
Check main distribution board
and power supply line
Faulty cable/connections
Check/have cable replaced by a
qualified electrician
Burnt fuse
Check and replace if required
Room thermostat set too
low
Set room thermostat on a higher
temperature
Room thermostat socket
cap not inserted
Insert cap into the thermostat
socket
Heater in lock-out mode
Reset
Heater starts, flame
ignites but then heater
locks out
Dirty or faulty flame sensor
Clean or replace
Faulty burner control unit
Contact service personnel
Heater starts, flame
does not ignite and
then heater locks out
Clogged nozzle
Clean or replace
Flame sensor receives an
external light signal during
ignition sequence
Check for external lights (sun,
lamps, etc.)
Faulty burner control unit
Contact service personnel
No fuel
Fill tank
Ignition fault, dirty or
incorrectly spaced
electrodes
Clean electrodes, contact
service personnel if required
Heater starts, but
combustion is not good
Dirty or blocked nozzle
Clean or replace
Clogged filters
Clean or replace
Leaks in fuel circuit
Check and eventually replace
Oil pump provides low
pressure
Contact service personnel
Insufficient combustion air
Wrong air lock setting
Insufficient ventilation air
Contact service personnel
Heater stops as the
air pressure switch
functions
The appliance has
overheated
See page 14
Faulty pressure switch
Contact service personnel
Troubleshooting
TROUBlESHOOTING CHART
