Operating instructions

Diagnosis in the Event of a Fault Shutdown of Thermo 90

Check fuses and electrical connections.

If the heater is activated by the switch or the timer with 3

time settings, the different types of malfunctions are indi-

cated by coded flashing signals via the operation indicator

light during the after-run period of the heater.

After five short signals have been emitted, the long flash-

ing pulses can be counted:

1x No start (after 2 start-up attempts)

2x Flame extinction (recurrent >5)

3x Undervoltage

4x Premature flame detection

5x Flame detector interruption or

flame detector short circuit

6x Temperature sensor interruption or

temperature sensor short circuit

7x Metering pump interruption or

metering pump short circuit

8x Blower motor interruption or

blower motor short circuit

blower motor incorrect speed

9x Pencil-type glow plug interruption or

pencil-type glow plug short circuit

Thermo 90 / Thermo 90 S