Bedienungsanleitung Valeo Thermo S (Seite 6 von 8) (Englisch)

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During all active operating phases of the heater, all components, the operating voltage

and functional irregularities are monitored and recorded.

Sole exception is the component test status in which the components are not monitored

for faults.

A malfunction causes the heater to terminate its operation by a fault shutoff and to go

into the fault lock-out mode to prevent the heater from an automatic combustion

restart. At the same time the operation indication begins to flash with a specific code.

The fault lock-out occurs:

low voltage during a defined period

if combustion was not established during start-up

if the flame extinguishes during operation

extrinsic light

if the control device itself has failed or peripheral components are defective

if the counter threshold is reached because of a repeated reduction of the

lower switching threshold to extend the heating duration (minimum

combustion time)

Variants to reset the heater after a fault lock-out:

1. Switch off the heater and then turning it on again.

2. „Off“ and „On” switching“ via the W-Bus S diagnostic interface

3. Reset the control device, e.g. through disconnecting it from the power supply.

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 heater lock-out occurs:

overheat protection has been activated, is disconnected or defective

water temperature sensor is defective

solenoid valve is defective

flame guard is defective

repeated malfunctions

repeated flame interruptions

flame within the purge cycle

control device malfunction or program error

Malfunction

Flash code

The kind of malfunction is indicated from the operating indication light through a flash

code or if the standard 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

Long Description of malfunction

pulses

0 Control Device malfunction (faulty checksum or no EOL programming)

1 No start within the safety time

2 Flame interruption, restart failed

3 Low voltage

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 defective

9 Circulating pump defective

10 Overheat protection has been activated

11 Electronic ignition unit defective

12 Heater fault lock-out, caused by several malfunctions or flame

interruptions

13 Nozzle pre-heater defective

14 Minimum combustion time was not reached several times

15 Revolution signal faulty

Subject to modification

Thermo S

160/230/300/350/400

If a heater lock-out has occurred, the heater must be maintained and released by

Spheros trained personnel.

Operating and

service instructions

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