CA11-130 Manual
Description of function - Troubleshooting
The thermostat (4) is controlled via a thermo-sensor (18) mounted at the outlet of
the heaiting coil.
In the switchbox (below the operating panel), a fuse (F1) is installed on the board
protecting the motor (11) of the fuel pump and the ventilator. If the motor is overloaded
the fuse trips. This may happen if the fuse pump is blocked or sluggish - the same
applies if the ventilator is blocked or sluggish or in case of an electrical malfunction.
Another fuse (F2) on the board trips, if the ignition transformer (17) is faulty.
There is a thermosensor (21) in the waste gas tube, which controls an excess
temperature relay with trigger function (19), i.e. when the exhaust gas temperature
in the chimney increases above 230 °C, this relay triggers. To activate it again,
you must wait until the combustion unit has cooled down, i.e. approximately 15
minutes. Then, you can press the button under the cover (19) again. The excess
temperature relay can trigger when the machine is operated over a longer period
in the highest steam level, or when there is lots of soot on the heating coil due to
poor combustion, or when the inside of the heating coil is calcied, so that there is
no ventilation (cooling).
As further safety function, the burner is also switched off, when the water tempe-
rature exceeds 147 °C.
The appliance is equipped with a visual ame monitoring device. A photo cell (16)
is installed above the burning chamber, switching off the fuel supply if the ame is
extinguished.
To avoid an overheating of the burning chamber a ow indicator (10) is installed in the
high pressure system between the high pressure pump (6) and the burning chamber
enabling a fuel supply only if water streams through the heating coil at the same time.
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Control board (p. 28-29)
The control board is equipped with two LEDs for trouble shooting.
L1: - illuminated, if the burner has been released but the ame is not burning. If
the ame starts burning within 2 seconds, the LED goes out.
If the LED does not go out the combustion has to be checked. If the LED is
not illuminated at all, the ame sensor has to be checked.
Nevertheless the cleaner can be used as a cold water high pressure cleaner
even if the burner is switched off.
L2: - permanently illuminated, if the overcurrent release has tripped.
- blinking, if the fuel ow valve detects only a low quantity of fuel in the tank or
if it is defctive.