Instruction manual DXB heater
page 20
Cause 1:
Within 5 sec flame, then flames failure.
•
The flame is not detected. Check the Photo cell. (resistances photo cell: no flame >2M
Ω
,
flame ± 10k
Ω
)
•
The heater has electrically a poor earth.
•
The print board is defective.
Cause 2:
•
There is not enough oil pressure.
•
The burner pressure is too low, adjust the pump pressure
•
The oil valve does not open, check during ignition on 230V on the valve.
•
Check whether the ignition electrode sparks, replace cable, electrode or ignition
transformer.
Cause 3:
not applicable
Cause 4:
not applicable
Cause 5
: Too many flame failures while burning
•
Bad earth connection on the heater
•
Oil pump pressure fluctuates, is too low.
check the oil supply.
•
Check the photo cell resistance value, see cause 1.
•
CO2 concentration is too high (lack of oxygen)
Cause 6
: System Fan is not running
•
The vane switch is not in the rest position at start.
•
The Fan has no power or is blocked.
•
Check the fan motor relay
Cause 7
: System fan runs
•
Check if the fan is dirty
•
Check if the vane switch can move freely
•
Check the wiring from the vane switch
•
Check if the heater is extremely dirty
•
Check if the supply voltage to the heater is sufficient
•
Check the fan motor relay
Case 8
: Selection resistance error
•
Check the appliance recognition part, replace if necessary
Case 9
: Reset button error
•
Too many switches on reset button in a short period of time. These error will disappear
after some time, or if the main power is disconnected for a while.
Case 10
: flame safety
•
Check the LDS photocell and wiring, the resistance of the photocell > 2M
Ω
.
•
(Sun)light reach the photocell
check / avoid light into burner chamber.
Heater starts but other problems.
a) Check the heater by firing it up with the reset/service button. Push it for 5 seconds and the
heater fires up, push it again (2 seconds) and the heater stops. If the reset/service button is
pushed for 7 seconds (“t” in the display), the system Fan will run. Push it again and the
heater stops. Try to operate the heater wit another room thermostat.
