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6.1.4
Functional test of ATMOS S 351 Natal: Vacuum extraction
The functional test of the unit shall be done with the supply voltage (
±
10%) given on the description plate and with the given mains
frequency:
•
for 230 V ac
207 V ac should be set
•
for 100 V ac
90 V ac should be set
•
for 115 V ac
103 V ac should be set
•
for 127 V ac
114 V ac should be set
The following functions must be checked:
The Natal accessories shall be connected to the unit for the functional test. The extraction cup is replaced by a piece of hose of
the same length. The unit is set to VE fully automatic (see Service 1 Menu).
Function increase/decrease vacuum
The end of the suction hose is open.
•
Switch off/switch on: A beep must be heard.
•
The display must be clearly visible. There must be no dirt particles visible and no pixel must be missing.
•
The pump runs continuously the green LED fl ashes, the heading ‘VE Auto’ can be seen in the display. Connect the end of the
suction hose to the vacuumgauge.
•
An audible signal sounds when the indicated vacuum value is 200 mbar (start beep).
•
Observe automatic vacuum increase. Counter (upper left) counts from 120 downwards.
•
Accelerate vacuum increase by pressing the ‘>’ key. While the ‘>’ key is kept depressed a continuous peep sound can be
heard. When the counter fi gure is about 10s release ‘>’ key and observe the end phase of the automatic vacuum increase.
•
After the end of the vacuum increase two signal peeps can be heard one after another. Note the value of the fi nal vacuum
achieved. The target value (upper right in the display) is -800 mbar.
•
Simulate a mains failure by switching off the unit. No vacuum decrease occurs. After about 5 seconds switch on the device
again. The vacuum is maintained.
•
Start the ventilation procedure by pressing the END key and check the vacuum decrease time (typically 20 seconds). The
counter (upper left) counts from 20 downwards.
•
After the vacuum decrease time the system is completely ventilated.
Function of Semi-Automatic Mode:
•
Switch off unit. While starting change into Service 1 Menu by pressing the "extraction cup" key. In the VE Automatic menu
select ”VE Semi-Automatic’ and confi rm with the Max key.
•
Switch unit off/on. The heading ‘VE semi’ can be seen in the display. The unit creates about -200 mbar vacuum and gives an
acoustic sign simultaneously with the fl ashing of the LED.
•
Automatic creation of vacuum is started with the pressing of the extraction cup key (beginning from about 200 mbar).
•
Ventilate by pressing the END key.
•
Set VE Fully Automatic in Service 1 Menu and confi rm with the Max key.
•
Switch unit off/on. The heading ‘VE Auto’ must be visible in the display.
•
Ventilate by pressing the END key.
6.0 Maintenance and repair
