23
5.3.1
Replace fan module
To get access to the fan module:
•
open the top cover;
•
remove the HEPA H14 main filter (see section 7.2
Replace the main HEPA filter
of the i-air Pro®
user manual).
The fan is switched ON via the control menu of the main PCB. For each fan speed level a particular
PWM value is assigned. The fan speed depends on the speed level selected. The PWM value can be
edited in service menu. Changing a parameter affects the value of air flow for a given fan level.
Other corrective maintenance tasks:
•
supply voltage control;
•
check the electrical installation;
•
control the control module;
•
check that the sensor is positioned in the axis of the hole.
5.4
Electronic module
The electronic module (Figure 17) is located in the upper part of appliance. It is replaced as one unit.
The electronic module consists of:
1.
Dust sensor
2.
VOC PCB
3.
Encoder PCB
4.
Control PCB with display
Figure 17
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