Operating and installation instructions
M-WRG-II P-T (-F, -FC), M-WRG-II E-T (-F, -FC) ventilation units
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Meltem Wärmerückgewinnung GmbH & Co. KG
Am Hartholz 4 · D-82239 Alling
[email protected] · www.meltem.com
VENTILATION THE RIGHT WAY
V E N T I L A T I O N & H E A T R E C O V E R Y
7.1.2 LED indicators on the ventilation unit
7.1.2.1 Selected ventilation program indicator
When a ventilation program is activated on the membrane touch pad, the corresponding
LED lights up (see Fig. 12 on page 23) for 10 seconds and then goes out again.
7.1.2.2 Status indicators
An LED that lights up continuously or flashes indicates one of the following ventilation unit
states:
Status
LED 1 lights up continuously
Air filter change required
LED 2 lights up continuously
Unit fault (e.g. faulty sensor or motor)
LED 3 flashes for 10 s
The absolute atmospheric humidity of the supply air is
greater than the absolute atmospheric humidity of the
extract air
LED 4 flashes for 10 s
The VOC value of the supply air is greater than
1500 ppm for 10 minutes (factory setting, only for units
with the M-WRG-II O/VOC-AUL option)
LED 5 flashes for 10 s
Ventilation unit in frost protection mode