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5.2 Start by using the service button
By pressing the S1 button (reset / start) while around 10 seconds, the appliance will start a heating
cycle, the display of the control board will show alternatively L (Low) and the operation code:
1 = 30 sec of pre-ventilation
2 = 5 sec of ignition of the burner
b = 15 sec of flame stabilization
b = heating at low power
By pressing a second time on the S1 button, the appliance will operate at its full power, the display will
indicate alternatively H (High) and the operation code as described above.
By pressing a third time the S1 button, the appliance will operation under normal condition which
means according to the MULTITHERM heat demand.
5 minutes after the last impulsion on the S1 button, the service mode will be automatically deactivated.
5.3 Start by using the MULTITHERM thermostat
Create a heat demand on the MULTITHERM by setting a comfort temperature greater than the
measured temperature. The heating cycle will start:
pre-purge (30 sec), ignition (5 sec), flame stabilization (15 sec) and heating mode.
A heating cycle last at least 4 minutes.
5.4 Simulation du défaut de flamme et réarmement
After shutting the gas valve, the unit shall go in safety state:
Post-ventilation (P)
Pre-purge (1)
Ignition (2)
Post-ventilation (P)
The display on the control board and the MULTITHERM show A 1.
The red lamp of the unit is ligthing.
Check, by opening the gas valve and pressing the S1 button that the heating cycle restarts.
5.5 Control board display
Table of the operation codes of the warm air heater:
Display State Description
Stand-by The unit is ready to start
Pre-purge The control board measure the difference of pressure into the
exchanger and activate the pre-ventilation while 30 seconds.
Ignition Sparkling for 5 secondes, gas valve opening. Flame
detection while 5 seconds.
Heating After 15 seconds of flame statilization, the warm air heater
operates at the asked capacity. The appliance operates for 4
minutes at least.
Post-ventilation After stop of the burner, the exchange is cooled for 3 minutes
at small speed. Le pre-mix fan is still turning while1 minute.
Summer ventilation Only the main fan is operating during the summer ventilation
mode (activation using MULTITHERM thermostat)
Destratification fan
mode
The main fan is operating at its low speed during the
destratification fan mode.
and 1 (or 2 or b)
Low speed mode
Heating in low speed by pressing the
board.
and 1 (or 2 or b)
High speed mode
Heating in high speed by pressing the
control board.
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