Weinmann BiLevel-ST VENTImotion WM 24800, Service And Repair Instructions

Page: 19 / 64

Test the device 19
VENTI power is working correctly if its displays
comes on after approx. 4 seconds and the
therapy device starts working again.
4. Now restore the mains power supply to the
therapy device. VENTI power is working cor-
rectly if its displays go out, in other words, if
VENTI
power switches to standby mode.
5. Switch off both devices.
4.14 Test noise
Note
This test is not needed, as it can only be performed
on a Weinmann test bench.
4.15 Test all keys, the rotary knob and 115 V mode
1. Plug the red drying adapter into the device
outlet.
2. Connect the device to a 115 V power source
and switch on the device.
Requirement:
the device must start working.
3. Press all the keys and the rotary knob to test
their function.
4. Turn off the device.
Note
If the keys do not work properly, perform the fol-
lowing measures in sequence and test again in
each case.
• Check fascia film and replace if necessary
(see "7.12 Replace fascia film" on page 45).
• Replace the control board (see "7.8 Replace
control board/display" on page 39).
Note
If the rotary knob does not work properly, perform
the following measures in sequence and test again
in each case:
• Change the encoder (see "7.11 Replace en-
coder (dial)" on page 44).
• Replace the control board (see "7.8 Replace
control board/display" on page 39).
Note
if 115 V mode does not work properly, replace
the mains supply unit (see "7.4 Replace mains sup-
ply unit" on page 33).