Valeo THERMO E+ 120 Betriebs- Und Wartungsanweisung Seite 9

Variants to reset the heater after a fault lock-out:
1. Switch off the heater and then turn it on again
2. Reset the control device, e.g. through disconnecting it from the power supply
3. „Off" and „On" switching" via the S-Bus diagnostic interface
4. Erase the data in the fault memory by means of the diagnostic tool.
Additional to the fault lock-out a heater lock-out occurs if safety related components are
affected. The fault code 12 will be displayed (see para. "Flash code").
If a heater lock-out has occurred, the heater must be maintained and released by Valeo
trained personnel.
Flash code
The kind of malfunction is indicated from the operating indication light through a flash code
or if the pre-selection timer is used in the display (operation display). The flash code is
immediately generated after detection of the malfunction and will be kept until the heater
is freed.
The flash code comprises of a burst (sequence) of 5 short flashes depicting the break and a
defined number of long pulses corresponding to the malfunction number, which are to be
counted. After that the cycle starts with 5 short flashes again and so on.
The meaning of the number of long pulses is shown in the table below.
Table: Flash codes
No. of
Description of malfunction
long pulses
0 Control device defective
1 No start within the safety time
2 Flame interruption, restart failed
3 Low voltage / overvoltage
4 Extrinsic light before starting or within the purge cycle
5 Flame guard defective
6 Temperature sensor / overheat protection defective
7 Solenoid valve defective
8 Combustion air fan motor / nozzle block pre-heater defective
9 Circulating pump defective
10 Overheat protection has been triggered
11 Electronic ignition unit defective
12 Heater lock-out activated
Thermo E+
120/200/320