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
14 Troubleshooting
Error
Cause
Remedy
Ventilation unit is not
running
Ventilation unit is in safe
mode after an EMC fault
Switch the ventilation unit off,
wait 15 seconds, then switch
on
Installation error
Have the wiring checked by a
qualified electrician
Faulty switch, motor or
controller
Check by a qualified
electrician
LED 2 lights up
continuously
Unit fault
Contact Meltem
The ventilation unit
frequently activates the
frost protection function
Filter change interval
exceeded
Change air filters (see “12.3
Operating noise of the
ventilation unit increases
in volume
Air filter is very dirty
Table 4: Troubleshooting